TY - CONF A1 - Kloß, Heinz A1 - Skopp, André A1 - Woydt, Mathias ED - Bartz, Wilfried J. T1 - Wear prediction in ultra-high speed and high temperature applications PY - 2000 SN - 3-924813-44-2 VL - 3 SP - 1639 EP - 1646 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-2427 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Gienau, Michael A1 - Habig, Karl-Heinz T1 - Hochtemperaturtribometer für Reibungs- und Verschleißprüfungen bis 1000°C PY - 1987 SN - 0025-5300 VL - 29 IS - 7/8 SP - 197 EP - 199 PB - Carl Hanser Verlag CY - München AN - OPUS4-2438 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ketting, M. A1 - Tintrup, F. A1 - Halama, H. A1 - Woydt, Mathias A1 - Tomaszewski, J. T1 - Fahrerprobung gleitlackgeschmierter Kettenglieder T2 - TAE-Lehrgang "Festschmierstoffe" CY - Ostfildern-Nellingen, Deutschland DA - 2002-06-05 PY - 2002 SN - 0724-3472 VL - 49 PB - Expert Verlag CY - Renningen AN - OPUS4-2439 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Habig, Karl-Heinz T1 - Tribologisches Hochtemperaturverhalten keramischer Werkstoffe unter Festkörperreibungsbedingungen T2 - VDI-Werkstofftag CY - München, Deutschland DA - 1988-03-15 PY - 1988 SN - 3-18-090670-7 SN - 0083-5560 N1 - Serientitel: VDI-Berichte – Series title: VDI-Berichte IS - 670 SP - 683 EP - 697 PB - VDI-Verl. CY - Düsseldorf AN - OPUS4-2440 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Habig, Karl-Heinz T1 - Influence of Temperature and Sliding Speed on Friction and Wear of SiSiC and MgO-ZrO2 T2 - 12th Annual Conference on Advanced and Comp. Ceramics CY - Cocoa Beach, FL, USA DA - 1988-01-17 PY - 1988 IS - 9-10 SP - 1419 EP - 1430 AN - OPUS4-2441 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Chavanes, A. A1 - Pauty, E. A1 - Woydt, Mathias T1 - Titanium-Molybdenum Carbonitride as Light-Weight and Wear Resistant Monolithic Material N2 - This paper presents the friction and wear behaviour of monolithic titanium-molybdenum carbonitride and tungsten carbide. These materials have been tested sliding against themselves, carbons, fibre reinforced glasses and molybdenum coatings and compared to other ceramics and ceramics composites under unlubricated condition up to 800 °C and 6 m/s. Self-mated sliding couples of titanium-molybdenum carbonitride display, especially under high-temperature friction, a pronounced wear resistance compared to ceramics and ceramic–ceramic composites. This very good property is due to the tribo-oxidative formation of so-called “lubricious oxides”, e.g. Magnéli phases of rutile. They exhibit sliding wear rates under unlubricated friction up to 800 °C as known from mixed/boundary lubrication. Within the different test conditions, the wear rates of a variety of stationary monolithic materials samples sliding against rotating specimen of (Ti, Mo)(C, N) are always in the group with the lowest wear rates. The association of the wear resistance, mechanical strength, fracture toughness and low density makes the (Ti, Mo)(C, N) material a complete solution for complex customer demands. KW - Titanium-molybdenum carbonitride KW - Lubrication KW - Wear rate PY - 2004 DO - https://doi.org/10.1016/S0043-1648(03)00513-1 SN - 0043-1648 VL - 256 SP - 647 EP - 656 PB - Elsevier CY - Amsterdam AN - OPUS4-2442 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias T1 - Tribological characteristics of polycrystalline Magnéli-type titanium dioxides N2 - The results presented in this paper have clarified experimentally, that titania-based Magnéli-phases (Ti4O7/Ti5O9 and Ti6O11) with (121)-shear planes exhibit more anti-wear properties than lubricious (low-frictional) properties. The results for dry sliding indicate that the coefficients of friction lie in the range of 0.1–0.6 depending on sliding speed and ambient temperature. The COF decreased with increasing temperature (T= 22–800°C) and increasing sliding speed (?= 1-6 m/s). The dry sliding wear rate was lowest for the Al2O3 at 1 m/s at 800°C with values of 1.7 × 10-8 and 6.4 × 10-8 mm3/N m, comparable to boundary/mixed lubrication, associated with a high dry frictional power loss of 30 W/mm2. The running-in wear length and, more important, the wear rate decreased under oscillating sliding tests with increasing relative humidity. The contact pressure for high-/low-wear transition increased under oscillating sliding tests with increasing relative humidity. At room temperature and a relative humidity of 100% the steady-state wear rate under dry oscillating sliding for the couple Al2O3/Ti4O7–Ti5O9 was lower than 2 × 10-7 mm3/N m and therefore inferior to the resolution of the continuous wear measurement sensor. TEM of wear tracks from oscillating sliding revealed at room temperature a work-hardening as mechanism to explain the running-in behavior and the high wear resistance. The hydroxylation of titania surfaces favours the high-/low-wear transition. KW - Magnéli-phases KW - Shear planes KW - Planar defects KW - Ceramics KW - Dry friction KW - High temperature KW - Titania KW - Wear KW - Work-hardening KW - TEM KW - Humidity PY - 2000 DO - https://doi.org/10.1023/A:1019170831371 SN - 1023-8883 SN - 1573-2711 VL - 8 SP - 117 EP - 130 PB - Springer Science Business Media B.V. CY - Dordrecht AN - OPUS4-2443 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Czichos, Horst T1 - Entwicklungstendenzen tribotechnischer Werkstoffe für den Fahrzeugbau - Teil 1 PY - 1988 SN - 0001-2785 VL - 90 IS - 5 SP - 237 EP - 246 PB - Vieweg CY - Wiesbaden AN - OPUS4-2444 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Czichos, Horst T1 - Entwicklungstendenzen tribotechnischer Werkstoffe für den Fahrzeugbau - Teil 2 PY - 1988 SN - 0001-2785 VL - 90 IS - 7/8 SP - 415 EP - 421 PB - Vieweg CY - Wiesbaden AN - OPUS4-2445 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Habig, Karl-Heinz T1 - High temperature tribology of ceramics KW - Ceramics KW - Alumina KW - Zirconia KW - Friction KW - Wear KW - Sliding PY - 1989 SN - 0301-679X SP - 75 EP - 90 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-2446 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Steinmann, D. T1 - Keramische Werkstoffe für umweltgerecht gestaltete Tribosysteme PY - 1990 SN - 0026-0746 VL - 44 IS - 9 SP - 843 EP - 848 PB - Giesel Verlag GmbH CY - Isernhagen AN - OPUS4-2447 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Klaffke, Dieter A1 - Habig, Karl-Heinz A1 - Czichos, Horst T1 - Tribological transition phenomena of ceramic materials PY - 1990 SN - 0043-1648 VL - 136 SP - 373 EP - 381 PB - Elsevier CY - Amsterdam AN - OPUS4-2448 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Habig, Karl-Heinz ED - Ludema, K. C. T1 - High temperature sliding friction and wear of silicon infiltrated silicon carbide T2 - 7th International Conference on Wear of Materials CY - Denver, CO, USA DA - 1989-04-09 PY - 1989 SN - 0-7918-0304-X VL - 1 SP - 419 EP - 429 PB - American Soc. of Mechanical Engineers CY - New York, NY AN - OPUS4-2449 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Klaffke, Dieter A1 - Habig, Karl-Heinz T1 - Sliding and Fretting Wear of MgO-ZrO2 PY - 1988 SN - 0-87170-331-9 SP - 71 EP - 78 PB - ASM International CY - Gaithersburg AN - OPUS4-2450 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Habig, Karl-Heinz ED - Friedrich, K. T1 - Sliding friction and wear of Al2O3, ZrO2, SiC and Si3N4 PY - 1989 SN - 0-444-42524-1 SN - 0927-0108 N1 - Serientitel: Composite materials series – Series title: Composite materials series IS - 1 SP - 106 EP - 113 PB - Elsevier CY - Amsterdam AN - OPUS4-2451 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Spaltmann, Dirk A1 - Löhr, Manuel A1 - Effner, Ute ED - Bartz, Wilfried J. T1 - Der Einfluss des E-Moduls und des Grundöls auf das Wälzverhalten von DLC- und Diamantbeschichtungen T2 - 14th International Colloquium Tribology "Tribology and Lubrication Engineering" CY - Stuttgart, Germany DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - 1 SP - 583 EP - 591 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3423 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Spaltmann, Dirk A1 - Löhr, Manuel A1 - Woydt, Mathias ED - Bartz, Wilfried J. T1 - Gibt es eine Korrelation zwischen der Topographie von DLC-Schichten und ihrem Verhalten unter geschmierter Wälzbeanspruchung? T2 - 14th International Colloquium Tribology "Tribology and Lubrication Engineering" CY - Stuttgart, Deutschland DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - 1 SP - 631 EP - 639 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3424 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Effner, Ute A1 - Löhr, Manuel A1 - Spaltmann, Dirk A1 - Woydt, Mathias T1 - Überrollbeständige DLC-Schichten unter Wälzverschleißbedingungen bis 2 GPa? T2 - Tribologie-Fachtagung 2002 CY - Göttingen, Deutschland DA - 2002-09-23 PY - 2002 SN - 3-00-003404-8 VL - 1 SP - 17-1-17-11 PB - GfT CY - Moers AN - OPUS4-3422 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klaffke, Dieter A1 - Löhr, Manuel A1 - Spaltmann, Dirk A1 - Woydt, Mathias A1 - Santner, Erich ED - Franek, F. ED - Pauschitz, A. T1 - Zuverlässige Wälzsysteme durch DLC-Schichten? Bedeutung und Aufgaben von Schichtsystemen T2 - Symposium der Österreichischen Tribologischen Gesellschaft CY - Wien, Österreich DA - 2003-11-20 PY - 2003 SN - 3-901657-13-4 SP - 59 EP - 68 PB - ÖTG CY - Wien AN - OPUS4-3131 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gienau, Michael A1 - Kelling, Norbert A1 - Köhler, Norbert A1 - Woydt, Mathias T1 - Ultra-High-Temperature Tribometer up to 1600°C KW - Ultrahochtemperaturtribometer KW - Ultrahigh temperature tribometer KW - Body flap KW - Control surfaces KW - Friction and wear PY - 2004 SN - 0196-6219 SN - 1940-6339 VL - 25 IS - 4 SP - 333 EP - 334 PB - Wiley InterScience CY - Hoboken, NJ AN - OPUS4-3112 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kleemann, J. A1 - Woydt, Mathias T1 - Dry friction and wear rates as under liquid lubrication of ceramic/carbon couples up to 450°C N2 - In a high temperature tribometer, stationary carbon has been tested against different rotating ceramics (SiC, Si3N4, Al2O3, WC-6Ni, MgO-ZrO2, (Ti, Mo)(C, N)) and stainless steel (DIN 1.4876). The rotating discs were grinded, polished and/or lapped. For most material combinations, the wear morphology is known from available literature. A transfer film with a typical wear pattern was found on the rotating disc. The combination of antimony graphite EK3245 against MgO-ZrO2 did not form carbonaceous transfer layer. Through advanced variation of the roughness up to Rpk=0.011?µm, the wear rate has been reduced to Kv ˜ 3.5×10-8?mm3/N?m at a stable coefficient of friction in a “millirange” of µ~0.008 for a sliding distance of 20.000?m. KW - Tribology KW - Lubrication KW - Ceramics KW - Carbon KW - Liquids PY - 2004 DO - https://doi.org/10.1108/00368790410515371 SN - 0036-8792 VL - 56 IS - 1 SP - 38 EP - 51 PB - Peterson CY - Droitwich, Worcs. AN - OPUS4-3314 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Kelling, Norbert A1 - Buchmann, M. T1 - Thermisch gespritzte, keramische Zylinderlaufbahnen unter Misch-/Grenzreibung N2 - Einen großen Beitrag zur Gewichtseinsparung leistet die Substitution von Grauguss-Legierungen durch moderne Aluminiumlegierungen für Pkw Kurbelgehäuse. Zur Erhöhung der tribologischen und thermomechanischen Belastungsgrenzen von Aluminiumoberflächen kommen thermisch gespritzte Schichten in Frage. Zielsetzung nachfolgender Untersuchungen ist es außermotorisch unter Misch-/Grenzreibung das tribologische Potenzial von thermisch gespritzten keramischen Schichtwerkstoffen auf Basis der Stoffsysteme Cr2O3, Cr2O3/TiO2, Cr3C2/NiCr, TiO2, TiO2/Al2O3 im Vergleich zu aktuell serienmäßig eingesetzten Graugusswerkstoffen zu ermitteln. Die Oberflächentopographien und die Schmierstoffe determinieren gegenüber GG26Cr die Verschleißsenkungspotenziale der keramischen Schichten. Eine Reduzierung der Reibungszahlen wird nicht durch keramische Oberflächenbeschichtungen, sondern durch den Einsatz von Polyglykolen als Schmiermedium erzielt. T2 - DGM-Tagung "Reibung und Verschleiß", Deutsche Gesellschaft für Materialkunde e.V. (DGM) CY - Fürth, Deutschland DA - 2004-03-10 KW - Kolbenring KW - Zylinderlaufbahn KW - Tribometer KW - Mischreibung KW - Polyglykol KW - Thermisches Spritzen KW - Cr2O3 KW - Cr2O3/TiO2 KW - Cr3C2/NiCr KW - TiO2 KW - TiO2/Al2O3 KW - Piston ring KW - Cylinder liner KW - Mixed lubrication KW - Polyglycol KW - Thermal spraying PY - 2004 DO - https://doi.org/10.1002/mawe.200400799 SN - 0933-5137 SN - 1521-4052 VL - 35 IS - 10/11 SP - 824 EP - 829 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-3240 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Skopp, André A1 - Dörfel, Ilona A1 - Witke, Klaus T1 - Wear Engineering Oxides / Antiwear Oxides KW - Oxid KW - Hochtemperatur KW - Keramik KW - Reibung PY - 1999 SN - 1040-2004 SN - 1547-397X IS - 42,1 SP - 21 EP - 31 PB - Taylor & Francis CY - Philadelphia, Pa. AN - OPUS4-711 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Witke, Klaus A1 - Österle, Werner A1 - Skopp, André A1 - Woydt, Mathias T1 - Raman microprobe spectroscopy and transmission electron microscopy of thermal sprayed ZrO2 coatings before and after rub testing of outer air seals N2 - 8 wt% Y2O3-ZrO2 spray powder and thermally sprayed as thermal barrier coatings on outer air seals were characterized by Raman microprobe spectroscopy (RMS) and transmission electron microscopy to investigate the lateral distribution, composition, structure and grain size of ZrO2 phases and to separate ZrO2 and Y2O3. RMS of transfer layers on ZrO2-coated shrouds after rub tests against SiC laser-tipped metallic blades showed the formation of metallic oxides MeIMeII2O4 of spinel type. Wear tracks were partly covered by graphite and spinel-type oxides. In some cases, the latter were better detectable after laser enhanced cleaning by burning off the covering carbon layer. PY - 2001 DO - https://doi.org/10.1002/jrs.791 SN - 0377-0486 SN - 1097-4555 VL - 32 IS - 12 SP - 1008 EP - 1014 PB - Wiley CY - Chichester AN - OPUS4-1230 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias T1 - Influence des conditions d'essais sur les données tribologiques N2 - Plusieurs essais coopératifs multilaboratoires ont été effectués en 1997, 1998, 1999, 2000 et 2001 par le groupe de travail DIN 51834 Essais tribologiques dans l'appareil translation-oscillation. Il s'agit d'essais effectués sur des machines différentes et dans différents lieux. Pour simplifier, on les dénomme essais circulaires. L'analyse statistique des résultats a examiné l'influence du choix du solvant, du modèle de l'appareil et des paramètres sur les caractéristiques tribologiques des différentes huiles. Le coefficient de frottement et les taux d'usure peuvent être classés selon les dix différents solvants utilisés: l'isopropanol donne des coefficients de frottement plutôt bas et l'isoparaffine des coefficients plutôt élevés. La variation du coefficient de frottement selon le modèle de machine se situe entre 0,2 % et 0,9 % et les taux d'usure ne sont pas non plus affectés par les solvants. Le diamètre de l'empreinte est insuffisant pour caractériser la résistance à l'usure d'une huile. Le critère pour l'adhésion a du être redéfini. La répétabilité et la reproductibilité ont été améliorées. PY - 2001 UR - http://cat.inist.fr/?aModele=afficheN&cpsidt=13446760 SN - 0032-6895 SN - 1778-3771 VL - 89 IS - 9-10 SP - 3 EP - 9 CY - Paris AN - OPUS4-1178 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias T1 - Review on Lubricious Oxides and Their Practical Importance PY - 2004 SN - 0-9247-4872-7 SP - 59 EP - 77 PB - Dekker CY - New York AN - OPUS4-3582 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Skopp, André A1 - Habig, Karl-Heinz T1 - Einfluß von Temperatur und Gleitgeschwindigkeit auf Festkörpergleitreibung und -verschleiß von Si3N4 bis 1000°C PY - 1989 SN - 0173-9913 SN - 0196-6219 VL - 66 IS - 10 SP - 426 EP - 432 PB - Göller CY - Baden-Baden AN - OPUS4-2402 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Woydt, Mathias A1 - Habig, Karl-Heinz T1 - Tribological behavior of silicon nitride materials under unlubricated sliding between 22°C and 1000°C KW - Silicon nitride KW - Wear maps KW - High temperature KW - Tribology KW - T-maps KW - Ceramics composites PY - 1995 SN - 0043-1648 VL - 181-183 SP - 571 EP - 580 PB - Elsevier CY - Amsterdam AN - OPUS4-2417 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Woydt, Mathias T1 - Ceramic and ceramic composite materials with improved friction and wear properties PY - 1995 SN - 1040-2004 SN - 1547-397X VL - 38 IS - 2 SP - 233 EP - 242 PB - Taylor & Francis CY - Philadelphia, Pa. AN - OPUS4-2418 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Witke, Klaus A1 - Skopp, André A1 - Woydt, Mathias ED - Michel, B. T1 - Raman spectroscopic investigations in tribologically stressed contacts of (Ti,Mo)(C,N) ceramics T2 - 2nd International Conference and Exhibition Micro Materials CY - Berlin, Germany DA - 1997-04-16 PY - 1997 SN - 3-932434-05-6 VL - 1 SP - 1094 EP - 1096 PB - ddp Goldenbogen CY - Dresden AN - OPUS4-2421 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Skopp, André ED - Zambelli, G. ED - Vincent, L. T1 - Céramiques et Composites à Matrice Céramique PY - 1998 SN - 2-88074-338-9 N1 - Sprachen: Englisch/Französisch - Languages: English/French SP - 187 EP - 196 PB - Presses polytechniques et universitaires romandes CY - Lausanne AN - OPUS4-2422 LA - mul AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Woydt, Mathias A1 - Habig, Karl-Heinz T1 - Unlubricated sliding friction and wear of various Si3N4 pairs between 22°C and 1000°C PY - 1990 SN - 0301-679X VL - 23 IS - 3 SP - 189 EP - 199 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-2403 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Habig, Karl-Heinz A1 - Woydt, Mathias A1 - Skopp, André T1 - Dry friction and wear of self-mated sliding couples of SiC-TiC and Si3N4-TiN PY - 1991 SN - 0043-1648 VL - 148 SP - 377 EP - 394 PB - Elsevier CY - Amsterdam AN - OPUS4-2404 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Woydt, Mathias T1 - Charakterisierung des tribologischen Verhaltens von keramischen Gleitpaarungen mit moderner Oberflächenanalytik PY - 1991 SN - 0933-5137 SN - 1521-4052 VL - 22 IS - 8 SP - 289 EP - 300 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-2405 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Skopp, André ED - Bartz, Wilfried J. T1 - Keramik-Keramik-Verbundwerkstoffe mit verbesserten Reibungs- und Verschleißeigenschaften T2 - 8. Internationales Kolloquium. Technische Akademie Esslingen ; 8th International Colloquium. Technische Akademie Esslingen CY - Esslingen, Deutschland DA - 1992-01-14 PY - 1992 SN - 3-924813-28-0 N1 - Serientitel: Internationales Kolloquium / Technische Akademie Esslingen – Series title: Internationales Kolloquium / Technische Akademie Esslingen VL - 2 IS - 8 SP - 15.1-1-15.1-16 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-2407 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Skopp, André A1 - Wäsche, Rolf T1 - Ceramic-ceramic composite materials with improved friction and wear properties PY - 1992 SN - 0301-679X VL - 25 IS - 12 SP - 61 EP - 70 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-2408 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Skopp, André A1 - Wäsche, Rolf ED - Carlsson, R. T1 - Ceramic-ceramic composite materials with improved friction and wear properties T2 - 4th International Symposium Ceramic Materials and Components for Engines CY - Göteborg, Sweden DA - 1991-01-01 PY - 1992 SN - 1-85166-776-8 SP - 1219 EP - 1239 PB - Elsevier CY - London AN - OPUS4-2409 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Skopp, André A1 - Hantsche, Harald T1 - Ceramic wear track characterization by advanced X-ray diffraction PY - 1992 SN - 0913-543X VL - 9 IS - 2 SP - 9 EP - 16 PB - Rigaku-Denki-Kabushiki-Kaisha CY - T¯oky¯o AN - OPUS4-2410 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Skopp, André T1 - Keramik-Keramik-Verbundwerkstoffe PY - 1993 SN - 0724-3472 VL - 40 IS - 1 SP - 23 EP - 29 PB - Expert Verlag CY - Renningen AN - OPUS4-2411 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Woydt, Mathias A1 - Habig, Karl-Heinz A1 - Brückner, R. A1 - Klug, T. T1 - Friction and wear behaviour of C- and SiC-fibre-reinforced glass composites against ceramic materials PY - 1993 SN - 0043-1648 VL - 169 SP - 243 EP - 250 PB - Elsevier CY - Amsterdam AN - OPUS4-2412 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Skopp, André A1 - Kelling, Norbert A1 - Berger, L.-M. T1 - Tribological Characterization of Titanium Suboxide Coatings Prepared by VPS Spraying T2 - 4th International Tribology Conference "Tribology of Surface Layers and Coatings", PRAGOTRIB 2004 CY - Prague, Czech Republic DA - 2004-06-17 PY - 2004 AN - OPUS4-3637 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Skopp, André A1 - Kelling, Norbert A1 - Berger, L.-M. ED - Suchanék, J. T1 - Tribological Characterization of Titanium Suboxide Coatings Prepared by VPS Spraying T2 - 4th International Tribology Conference "Tribology of Surface Layers and Coatings" CY - Prague, Czech Republic DA - 2004-06-17 KW - Titanium oxide coatings KW - Thermal spraying KW - Unlubricated sliding wear KW - Lubricated sliding wear KW - Lubricants PY - 2004 SN - 80-2393123-7 PB - Czech Tribology Society CY - Prag AN - OPUS4-3638 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Tomaszewski, J. A1 - Halama, H. A1 - Tintrup, F. A1 - Ketting, M. T1 - Verschließschutz in Gleisketten mit harten oder weichen Oberflächen T2 - 1. Fachtagung Baumaschinentechnik 2003 CY - Dresden, Germany DA - 2003-03-20 PY - 2003 AN - OPUS4-4285 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Pauty, E. A1 - Chavanes, A. T1 - Titanium-molybdenum carbonitride as ligh-weight and wear resistant monolithic material T2 - 58th Annual Meeting Society of Tribologists and Lubrication Engineers CY - New York City, NY, USA DA - 2003-04-28 PY - 2003 AN - OPUS4-4276 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Chavanes, A. A1 - Pauty, E. T1 - Titanium-molybdenum carbonitride as ligh-weight and wear resistant monolithic material T2 - Tribologie-Fachtagung 2003 CY - Göttingen, Germany DA - 2003-09-22 PY - 2003 AN - OPUS4-4277 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Czichos, Horst A1 - Woydt, Mathias A1 - Klaffke, Dieter A1 - Lexow, Jürgen T1 - Durability of Ceramic Parts - Wear Behaviour PY - 1989 SN - 0032-6895 SN - 1778-3771 SP - 7 EP - 15 CY - Paris AN - OPUS4-9537 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Berger, L.-M. A1 - Woydt, Mathias A1 - Keller, H. A1 - Zimmermann, S. A1 - Schwier, G. A1 - Enzl, R. A1 - Thiele, S. T1 - Tribological behaviour of HVOF-sprayed Cr3C2-NiCr and TiC-based coatings under high temperature dry sliding conditions N2 - In the current study, the tribological properties of TiC-based coatings paired with polycrystalline alumina under unlubricated sliding conditions were investigated in order to demonstrate the technological and engineering potential of such coatings. (Ti,Mo)(C,N)-Co coatings were prepared from an agglomerated and sintered spray powder by HVOF spraying using JP-5000 equipment. Cr3C2-NiCr coatings were studied for comparison. Sliding wear tests were performed over the temperature range from 23°C to 800°C with sliding speeds in the range 0.3-3 m/s, a wear distance of 5000 m and a normal force of 10 N. Wear rates of coatings and sintered alumina counterparts were measured separately. Compared with Cr3C2-NiCr coatings, (Ti,Mo)(C,N)-Co coatings showed significantly lower total wear rates, corresponding to those found in the region of mixed/boundary lubrication. With few exceptions, the coefficients of friction were found to be lower for (Ti,Mo)(C,N)-Co coatings than for Cr3C2-NiCr coatings. After tests were performed, the coating microstructures were studied by optical microscopy and SEM. The oxide scales formed on the coating surfaces were investigated by SEM and X-ray diffraction. Comparison of the total wear rates of the couples consisting of sintered alumina and a (Ti,Mo)(C,N)-Co coating with those of other alumina-ceramic and hardmetal-hard metal tribological systems demonstrates the immense potential of TiC-based coatings for sliding wear applications. T2 - International Thermal Spray Conference & Exposition 2004 CY - Osaka, Japan DA - 2004-05-10 PY - 2004 SN - 3-87155-792-7 SP - 1(?) EP - 10(?) PB - DVS-Verl. CY - Düsseldorf AN - OPUS4-5123 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Kleemann, J. T1 - Tribological Concepts for High Temperature Steam Engines T2 - 28th International Cocoa Beach Conference and Exposition on Advanced Ceramics & Composites CY - Cocoa Beach, FL, USA DA - 2004-01-25 PY - 2004 AN - OPUS4-11063 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Köhler, Norbert A1 - Kelling, Norbert A1 - Gienau, Michael T1 - Ultrahigh-temperature tribometer T2 - 28th International Cocoa Beach Conference and Exposition on Advanced Ceramics & Composites CY - Cocoa Beach, FL, USA DA - 2004-01-25 PY - 2004 AN - OPUS4-11064 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Ti-O - Ein Stoffsystem mit erscheinungsreichen tribologischen Eigenschaften T2 - DGM-Tagung "Reibung und Verschleiß", Deutsche Gesellschaft für Materialkunde e.V. (DGM) CY - Fürth, Germany DA - 2004-03-10 PY - 2004 AN - OPUS4-11065 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Kelling, Norbert A1 - Buchmann, M. T1 - Thermisch gespritzte, keramische Zylinderlaufbahnen unter Misch-/Grenzreibung T2 - DGM-Tagung "Reibung und Verschleiß", Deutsche Gesellschaft für Materialkunde e.V. (DGM) CY - Fürth, Germany DA - 2004-03-10 PY - 2004 AN - OPUS4-11066 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Lifetime lubricated engines using triboreactive materials and alternative lubricants T2 - NATO Research and Technology Organization AVT-109 Specialists' Meeting on "The Control and Reduction of Wear in Military Platforms" CY - Williamsburg, VA, USA DA - 2004-06-07 PY - 2004 AN - OPUS4-11067 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Löhr, Manuel A1 - Spaltmann, Dirk A1 - Binkowski, Sigrid A1 - Santner, Erich A1 - Woydt, Mathias T1 - In situ Acoustic Emission for wear life detection of DLC coatings during slip-rolling friction N2 - Different diamond-like carbon (DLC) coatings on a steel substrate (100Cr6) were tested under slip-rolling friction conditions against uncoated counter bodies of the same steel. The initial maximum Hertzian pressure was varied in a range of P0 = 1.5–2.3 GPa. The friction tests were carried out under dry conditions and with an unadditivated paraffin oil as lubricant. It could be shown that the thickness of the coatings affects the respective wear life. Further, a very important factor for the wear life of a coating under lubricated slip-rolling conditions is the roughness of the surface of the respective counterbody. The wear life tests were monitored by recording in situ the Acoustic Emission (AE) signals. Some causes for a high AE activity could be identified. KW - Wear life KW - Slip-rolling friction KW - Diamond-like carbon (DLC) KW - Acousitc Emission KW - Lubircation KW - Roughness PY - 2006 DO - https://doi.org/10.1016/j.wear.2005.03.009 SN - 0043-1648 VL - 260 IS - 4-5 SP - 469 EP - 478 PB - Elsevier CY - Amsterdam AN - OPUS4-12064 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Klaffke, Dieter A1 - Woydt, Mathias A1 - Dörfel, Ilona T1 - Interface formation by tribo-oxidation in SiC based ceramics T2 - AIST-BAM Symposium on Materials Surface Technology in Twin Institute Programme CY - Tsukuba, Japan DA - 2003-02-18 PY - 2003 SP - 1 EP - 4 AN - OPUS4-12051 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter A1 - Woydt, Mathias A1 - Dörfel, Ilona T1 - Structure of the interface in SiC-based ceramic composites formed by tribo-oxidation under dry sliding conditions PY - 2004 SN - 1042-1122 VL - 146 SP - 401 EP - 407 PB - American Ceramic Society CY - Westerville, Ohio AN - OPUS4-12053 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Yarim, Rasim A1 - Wäsche, Rolf A1 - Woydt, Mathias A1 - Dörfel, Ilona T1 - Analysis of wear protecting oxide layers in the system SiC-TiC-TiB2 formed in-situ at high temperatures T2 - AIST-BAM Symposium on Materials Surface Technology in Twin Institute Programme CY - Tsukuba, Japan DA - 2003-02-18 PY - 2003 SP - 5 EP - 8 AN - OPUS4-12057 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Skopp, André A1 - Kelling, Norbert A1 - Berger, L.-M. T1 - Thermally sprayed TiO2-x coatings under mixed lubrication and unlubricated sliding conditions T2 - Tribologie-Fachtagung 2004 CY - Göttingen, Deutschland DA - 2004-09-27 KW - Thermisch gespritzte Schichten KW - TiOx KW - Magnéli-Phasen KW - Tribologische Prüftechnik KW - Reibung KW - Verschleiß KW - Kolbenring/Zylinderlaufbahn PY - 2004 SN - 3-00-015053-6 SP - 1(?) EP - 13(?) PB - Ges. für Tribologie CY - Moers AN - OPUS4-4396 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Binkowski, Sigrid A1 - Woydt, Mathias A1 - Dietrich, E. T1 - Ungewöhnliche Aufhärtung des 100Cr6 in einem geschädigten Keramik-Hybrid-Wälzlager KW - Hybrid KW - Spindel bearing KW - Si3N4 KW - Microhardness KW - White etching layers KW - Martensite PY - 2006 SN - 0724-3472 VL - 53 IS - 4 SP - 47 EP - 49 PB - Expert Verlag CY - Renningen AN - OPUS4-13761 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Binkowski, Sigrid A1 - Woydt, Mathias A1 - Dietrich, E. T1 - Außergewöhnliche Aufhärtung von 100Cr6 in einem ausgefallenen Keramik-Hybrid-Wälzlager N2 - An einem defekten Keramik-Hybrid-Wälzlager wurde eine Metallographische Schadensanalyse durchgeführt um die Ursache des plötzlichen Ausfalls zu bestimmen. T2 - 39. Metallographietagung 2005 CY - Erlangen DA - 2005-09-14 KW - 100Cr6 KW - Tribologie KW - Laufbahn KW - Präparation KW - Aufhärtung KW - Nanokristallin PY - 2005 UR - http://www.struers.com/resources/elements/12/79041/e-Structure%208T.pdf IS - e-8 SP - 2 EP - 5 PB - Struers CY - Willich AN - OPUS4-11179 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Binkowski, Sigrid A1 - Woydt, Mathias A1 - Dietrich, E. T1 - Ungewöhnliche Aufhärtung des 100Cr6 in einem ausgefallenen Keramik-Hybrid-Wälzlager T2 - 39. Metallographie-Tagung CY - Erlangen, Deutschland DA - 2005-09-14 PY - 2005 SN - 3-88355-343-3 SN - 0343-3579 N1 - Serientitel: Sonderbände der praktischen Metallographie – Series title: Sonderbände der praktischen Metallographie IS - 37 SP - 247 EP - 252 PB - Werkstoff-Informationsges. CY - Frankfurt AN - OPUS4-11180 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias T1 - Alternative Werkstoffe und Beschichtungen für die Kolbengruppe geschmiert von alternativen Motorenölen PY - 2006 SN - 3-87480-226-4 SP - 40 EP - 45 PB - Leuze CY - Bad Saulgau AN - OPUS4-13710 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Spaltmann, Dirk A1 - Löhr, Manuel A1 - Binkowski, Sigrid A1 - Kelling, Norbert A1 - Soltwedel, Rocco A1 - Woydt, Mathias A1 - Santner, Erich T1 - Schäden wälzbeanspruchter DLC-Schichten auf Stahlsubstraten unterschiedlicher Härte N2 - Paraffinöl geschmierte Wälztests wurden an extrem harten Diamantschichten auf hartem SSiC Substrat, unterschiedlichen, harten DLC-Schichten auf 100Cr6 Substraten (HRC60) sowie ausgewählten DLC-Schichten auf ungehärtetem Stahl (HRC 20) durchgeführt. Die Wälztests wurden in einem Zweischeibentribometer vom Typ Amsler bei einer anfänglichen, maximalen Flächenpressung nach Hertz von P0=2,3 GPa ausgeführt. Als Abbruchkriterium für die Tests wurde das Erreichen von n=1.000.000 Überrollungen (Langzeittests n=10.000.000 Überrollungen) oder das Auftreten einer Schädigung mit einer zusammenhängenden Fläche von A>1 mm2 festgelegt. Die Wälztests zeigten, dass das harte SSiC Substrat zwar eine stützende Wirkung auf die Diamantschicht hat, diese aber aufgrund von Rissen im Substrat versagte. Ferner gibt es wenigstens zwei DLC-Schichten, die, aufgebracht auf 100Cr6 Scheiben (HRC60), den Wälztests bis n=10.000.000 Überrollungen ohne nennenswerte Schäden widerstanden. Diese Schichten passten sich auch den Verformungen des weichen, stickstofflegierten Stahls (HRC20) an, ohne das es zu größeren Abplatzungen kam (A>1 mm2). KW - Slip-rolling KW - Lubrication KW - Hardness KW - DLC KW - Steel KW - Wälzen KW - Schmierung KW - Härte KW - DLC KW - Stahl PY - 2005 DO - https://doi.org/10.1002/mawe.200400850 SN - 0933-5137 SN - 1521-4052 VL - 36 IS - 2 SP - 62 EP - 68 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-7209 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias T1 - Triboaktive Werkstoffe für hohe Gleitgeschwindigkeiten bis 800 °C PY - 2005 SN - 0724-3472 VL - 52 IS - 4 SP - 5 EP - 12 PB - Expert Verlag CY - Renningen AN - OPUS4-11028 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Ketting, M. A1 - Tomaszewski, J. T1 - Soft coatings or hard materials for wear protection in running gears or tracked chains? T2 - NATO Research and Technology Organization AVT-109 Specialists' Meeting on "The Control and Reduction of Wear in Military Platforms" CY - Williamsburg, VA, USA DA - 2004-06-07 PY - 2004 AN - OPUS4-11055 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Skopp, André A1 - Kelling, Norbert A1 - Berger, L.-M. T1 - Thermally sprayed TiO2-x coatings under mixed lubrication and unlubricated sliding conditions T2 - Tribologie-Fachtagung 2004 der Gesellschaft für Tribologie CY - Göttingen, Germany DA - 2004-09-27 PY - 2004 AN - OPUS4-11061 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias T1 - Tribologie des céramiques N2 - Les ceramiques modernes sont differentes des ceramiques traditionnelles (carrelage, materiaux de construction, porcelaine); on les distingue par des adjectifs tels que « techniques », « industrielles » ou « thermomecaniques ». Les ceramiques industrielles sont caracterisees par leur caractere refractaire marque et de grandes duretes. Leur mediocre tenacite explique leur sensibilite ä la presence de defauts, d'oü leur reputation d'etre peu resistantes et cassantes. Les ceramiques techniques sont utilisees pour: • leurs proprietes electriques ou dielectriques; • leurs proprietes magnetiques et de supraconducteurs ; • leurs proprietes optiques; • leurs proprietes chimiques; • leurs proprietes biologiques; • leurs proprietes nucleaires. En outre, eiles sont employees pour leurs proprietes mecaniques, thermomecaniques et tribologiques, ainsi que pour leur tenue face ä la corrosion. Nous allons nous concentrer sur leur comportement tribologique. PY - 2013 N1 - Serientitel: Les sélections - Techniques de l'ingénieur – Series title: Les sélections - Techniques de l'ingénieur SP - TRI 4 550-1 EP - TRI 4 550-14 CY - Paris AN - OPUS4-28146 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Friction reduction in powertrains by polyglycols, alternative steels, alternative additives and/or thin films T2 - 68. Annual Meeting & Exhibition, Society of Tribologists and Lubrication Engineers CY - Detroit, MI, USA DA - 2013-05-05 PY - 2013 AN - OPUS4-28435 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Friction and wear of binderless niobium carbide T2 - 68. Annual Meeting & Exhibition, Society of Tribologists and Lubrication Engineers CY - Detroit, MI, USA DA - 2013-05-05 PY - 2013 AN - OPUS4-28436 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Manier, Charles-Alix A1 - Theiler, Geraldine A1 - Woydt, Mathias A1 - Ziegele, H. ED - Richard, C. ED - Bigerelle, M. ED - Mazeran, P.-E. ED - Bonis, M. T1 - Couches minces pour contacts lubrifies sous sollicitation en slip-rolling (glissement-roulement) et haute pression hertzienne initiale de contact T2 - Conception, fabrication et durabilité (JIFT 2009) CY - Compiègne, France DA - 2009-05-05 KW - Thin film coatings KW - DLC KW - Zr(CN) KW - ta-C KW - Slip-rolling KW - Mixed lubrication PY - 2012 SN - 978-2-911256-80-6 SP - 211 EP - 223 PB - TRANSVALOR - Presses des Mines AN - OPUS4-26011 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Nullverschleiß T2 - Tribologie-Kolloquium (TU Chemnitz) CY - Chemnitz, Germany DA - 2012-06-21 PY - 2012 AN - OPUS4-26031 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias T1 - Application des données tribologiques des matériaux PY - 2012 SN - 2114-2300 VL - 6 IS - BM 7 006v2 SP - 1 EP - 14 CY - Paris, France AN - OPUS4-26341 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - The potential of 36NiCrMo1-5-7 steel in applications demanding low slip rolling resistance and high load carrying capacity T2 - 2. International Symposium on Nb and Mo alloying in high performance steels CY - Jeju Island, South Korea DA - 2013-04-24 PY - 2013 AN - OPUS4-28270 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Mohrbacher, H. T1 - Tribological Profile of Binderless Niobium Carbide T2 - International Conference on Refractory Metals and Hard Materials CY - Reutte, Austria DA - 2013-06-03 PY - 2013 AN - OPUS4-28626 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias T1 - Biolubrifiants N2 - Un point de départ pour la mise en route des lubrifiants « neutre à l'environnement » ont été les huiles perdues et les fuites accidentelles, les lubrifiants perdus rejoignant les sols et les eaux (voir lac de Constance). Même en prenant en compte les voies du recyclage, la combustion dans les moteurs et les fuites connues, environ 30 % (entre 20 % et 40 %, selon les études) du volume de lubrifiants entre dans l'environnement par des voies non attribuables ou est probablement mis en décharge de manière illégale. Avec de tels chiffres publics, les arguments des lobbyistes de l'industrie pétrochimique, affirmant que, dans la plupart des applications, les fluides sont enfermés dans des réservoirs clos et étanches, ne convainquent pas les politiques. C'est aussi peut-être parce que, en Allemagne, environ 60 % des particuliers changent leur huile eux-mêmes. KW - Bioöle KW - Gesetzgebung KW - Ester KW - Polyglykole KW - Mineralöle KW - Toxikologie KW - Abbaubarkeit KW - Nachwachsend PY - 2011 SN - 2114-2300 IS - 9 SP - TRI 1 800-1-11, EP - Doc TRI 1 800-1 CY - Paris, France AN - OPUS4-24563 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Merryweather, St. A1 - Zweifel, D. T1 - Fuel economy through engine oils based on polyalkylene glycols T2 - Tribologie-Fachtagung 2011 CY - Göttingen, Germany DA - 2011-09-26 PY - 2011 AN - OPUS4-24531 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Scholz, Christian A1 - Woydt, Mathias T1 - Highly stressable and low friction slip-rolling contacts through thin film coatings, uncoated, alternative steels or lubricants N2 - OEMs perceive diamond-like carbon (DLC) coatings as part of a strategy for low frictional tribosystems. Especially the automotive industry anticipates a benefit in applying such coatings in association with the lightweight construction of mechanical parts, for instance in gears and engines. In previous investigations it was shown, that DLC, amorphous carbon (a-C) and tetragonal amorphous carbon (ta-C) coatings can be slip-rolling resistant at least up to ten million load cycles at Hertzian contact pressures P0max of 2.9 GPa lubricated by engine oil at 120°C, Further improvements in load carrying capacity up to P0mean of 2.62 GPa (FN= 5,000 N) were achieved with alternative, available Steel metallurgies as Substrates for thin film coatings. Additional factors, such as influences of the lubrication on the surface chemistry (additives and base oils), wear and friction behavior were investigated. T2 - International tribology conference 2011 CY - Hiroshima, Japan DA - 30.10.2011 KW - Slip-rolling KW - Additives KW - DLC KW - ZrCN KW - High toughness steel KW - High pressure PY - 2011 IS - B4-08 SP - 1 EP - 1 AN - OPUS4-24702 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Scholz, Christian A1 - Spaltmann, Dirk A1 - Woydt, Mathias T1 - Höchstbelastbare Wälzkontakte mit geringer Misch-/Grenzreibungszahl N2 - Leichtbaustrategien im Antriebsstrang erhöhen durch Downsizing die Hertz’schen Kontaktpressungen und die mechanischen Lasten. Dadurch müssen neben wälzbeständigen Stählen auch dazu passende reibungsmindernde Konzepte gefunden werden, in der vorliegenden Arbeit wurden alternative, hoch zähe Stähle mit einer Wälzbeständigkeit bis Pomax = 4,2 GPa untersucht, welche mit geeigneten Grundöl- und Additivkombinationen die Reibungszahlen herunter auf 0,025 reduzieren konnten. Diese alternativen Stahllegierungen erlauben nicht nur an der Zahnflanke sehr hohe Kontaktpressungen, sie bieten außerdem entsprechende Zähigkeits- und Festigkeitseigenschaften für den Zahnfuß. In vorangegangenen Untersuchungen wurde eine Vielzahl verschiedener Dünnschichten auf ihre Überrollbeständigkeit unter Extrembeanspruchungen validiert. Allerdings zeigte sich bei den meisten Dünnschichten ein Qualitätsunterschied von Charge zu Charge. Unter Verwendung verschiedener organischer, metallorganischer und anorganischer Additive konnten, sich daran anschließende Versuche, vielversprechende Ergebnisse erzielt werden. Sämtliche Versuche unter extremen Beanspruchungen wurden bei +120°C Öltemperatur auf Zwei-Scheiben-Tribometern vom Typ AMSLER und 2Disk von Optimol Instruments unter Misch-/Grenzreibungsbedingungen durchgeführt und die tribologischen Eigenschaften der neuartigen, unbeschichteten Stähle und in Relation zu leistungsstarken DLC-/ZrCN Dünnschichten gesetzt. T2 - 52. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß - Forschung und praktische Anwendungen CY - Göttingen, Deutschland DA - 26.09.2011 KW - Hochzähe Stähle KW - DLC KW - ZrCN KW - Dünnschichten KW - Extrembeanspruchung KW - Polyglykole KW - Additive PY - 2011 SN - 978-3-00-035439-7 VL - I SP - 11/1 EP - 11/16 AN - OPUS4-24611 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Merryweather, St. A1 - Zweifel, D. T1 - Fuel economy through engine oils based on polyalkylene glycols T2 - 18. Int. Colloq. Tribology - Industrial and Automotive Lubrication CY - Ostfildern, Germany DA - 2012-01-10 PY - 2012 AN - OPUS4-25342 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gili, F. A1 - Igartua, A. A1 - Luther, R. A1 - Woydt, Mathias T1 - The impact of biofuels on engine oil performance N2 - The dilution of biogenic fuels into lubricating engine oils often leads to a shortening of the recommended oil drains (between 30% and 60%) and an increase in wear. The large number of overlapping and influencing factors, of which dilution and polymerization of fuel components in the engine oil are emphasised, makes it difficult to find a uniform solution to prevent failures in the various applications. Insofar single solutions for the different types of biofuels are needed. The contribution of base oil chemistry and additives as well as triboactive materials is featured to deal with the adverse effects of biofuels. In the frame of the European Commission (EC)-funded project 'cleanengine', tentative engine oils based on esters with a content of renewables and polyglycols are formulated to increase the lubricant's tolerance in engines fuelled with biofuel-based blends, with the aim of ensuring required lubricating and wear protection performance while keeping oil drain intervals unchanged. The present paper focuses on four-stroke diesel applications, fuelled by biodiesel (fatty acid methyl ester — FAME) as well as by rapeseed oil and Jatropha oil (pure vegetable oils, triglycerides), together with relevant blends of those biofuels and conventional diesel fuel. This paper screens the functional profile (in particular rheological, toxicological, bio-compatibility, tribological and biofuels affinity) of lube families with respect to biofuel contamination. Moreover, this is followed by the contributions of piston ring and liner materials as well as thin film coatings. KW - Lubricants KW - Engine oil KW - Additives KW - Biofuel KW - Ester KW - Polyglycol KW - Thin film coatings KW - Slip-rolling KW - DLC KW - Dilution KW - FAME KW - Jatropha KW - Rapeseed KW - Stem valve KW - Piston ring PY - 2011 DO - https://doi.org/10.1002/ls.158 SN - 0954-0075 SN - 1557-6833 VL - 23 IS - 7 SP - 313 EP - 330 PB - Leaf Coppin Publ. Ltd. CY - Deal AN - OPUS4-24831 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gili, F. A1 - Igartua, A. A1 - Luther, R. A1 - Woydt, Mathias T1 - The impact of biofuels on engine oil's performance T2 - 17th International colloquium tribology CY - Esslingen, Germany DA - 2010-01-19 KW - Lubricants KW - Engine oil KW - Additives KW - Bio-fuel KW - Ester KW - Polyglycol KW - Thin film coatings KW - Slip-rolling KW - DLC KW - Dilution KW - FAME KW - Jatropha KW - Rape seed KW - Stem valve KW - Piston ring PY - 2010 SP - 17_Woydt_Biofuels_Plenary, 1 EP - 13 AN - OPUS4-24832 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Scholz, Christian A1 - Manier, Charles-Alix A1 - Brückner, A. A1 - Weihnacht, V. T1 - Slip-rolling resistance of ta-C and a-C coatings up to 3,000 MPa of maximum Hertzian contact pressure N2 - The slip-rolling resistances of hard and stiff thin films under high Hertzian contact pressures can be improved by optimizing the 'coating/substrate systems'. It is known from former investigations that the so-called 'egg-shell' effect is no general hindrance for high slip-rolling resistance of thin hard coatings. The coating stability depends more on specific deposition process and coating/substrate interface design. In this article it is experimentally shown, that pure amorphous carbon thin films with hardness between 15 and 63 GPa can be slip-rolling resistant several million load cycles under a maximum Hertzian contact pressures of up to 3.0 GPa. Whereas all coatings were stable up to 10 million load cycles in paraffin oil at room temperature, reduced coating lifetime was found in SAE 0W-30 engine oil at 120°C. It was shown how the coating hardness and the initial coating surface roughness influence the running-in process and coating lifetime. No clear correlation between coating hardness and coating lifetime could be observed, but friction coefficients seem to be reduced with higher coating hardness. Very low friction down to ~0.03 in unmodified engine oils was found for the hardest ta-C film.------------------------------------------------------------------------------------------------------------------------------------------------ Die Wälzbeständigkeit von harten und steifen Dünnschichten unter hohen Hertzschen Kontaktpressungen kann durch die Optimierung des 'Beschichtung/Substrat Systems' deutlich verbessert werden. Aus vorangegangenen Untersuchungen ist bekannt, dass der so genannte 'Eierschaleneffekt' kein generelles Hindernis für eine hohe Wälzbeständigkeit für harte Dünnschichten darstellen muss. Die Stabilität der Beschichtungen hängt vielmehr von dem spezifischen Prozessparametern und dem Schicht/Substrat Grenzflächendesign ab. In diesem Artikel wird experimentell nachgewiesen, dass reine amorphe Kohlenstoffdünnschichten mit Härtewerten zwischen 15 und 63 GPa für mehrere Millionen Lastzyklen unter maximalen Hertzschen Kontaktpressungen bis 3.0 GPa überrollbeständig sein können. Während alle Beschichtungen bis 10 Millionen Lastzyklen in Paraffinöl bei Raumtemperatur keine Defekte aufweisen wurde unter Verwendung eines SAE 0W-30 Motorenöls bei 120°C eine Verringerung der Überrollbeständigkeit nachgewiesen. Es wurde nachgewiesen, wie die Schichthärte und ursprüngliche Oberflächenrauheit der Beschichtung den Einlaufprozess und die Lebensdauer beeinflussen. Es konnte keine offensichtliche Korrelation zwischen Schichthärte und Lebensdauer festgestellt werden, allerdings wurde eine scheinbare Reduktion des Reibwertes mit steigender Schichthärte beobachtet werden. Dabei zeigte die härteste ta-C Schicht unter Verwendung des Motorenöls sehr geringe Reibwerte mit ~0.03. KW - ta-C KW - a-C KW - Friction KW - Wear KW - Slip-rolling KW - Rolling contact fatigue KW - Reibung KW - Verschleiß KW - Wälzen KW - Rollkontaktermüdung PY - 2012 DO - https://doi.org/10.1002/mawe.201200956 SN - 0933-5137 SN - 1521-4052 VL - 43 IS - 12 SP - 1019 EP - 1028 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-27602 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Woydt, Mathias ED - Tung, S.C. ED - Totten, G.E. T1 - Nonpetroleum-based, no/low-sulphur, ash, and phosphorus, and bio-no-toxicity engine oil development and testing PY - 2012 SN - 978-0-8031-7036-0 IS - Chapter 18 SP - 317 EP - 329 CY - West Conshohocken, PA, USA AN - OPUS4-27605 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Reibverhalten alternativer Stähle und dünner kohlenstoffhaltiger Beschichtungen - ein Gleit-Roll-Benchmark T2 - OilDoc Conference & Exhibition. Lubricants Maintenance Tribology CY - Rosenheim, Germany DA - 2013-01-22 PY - 2013 AN - OPUS4-27609 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Biolubes - Legal situation and trends T2 - Seminar on eco-friendly and highly loaded tribosystems CY - Tokyo, Japan DA - 2013-02-13 PY - 2013 AN - OPUS4-27714 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Slip-rolling tests of KYB DLC coatings T2 - Seminar on eco-friendly and highly loaded tribosystems CY - Tokyo, Japan DA - 2013-02-13 PY - 2013 AN - OPUS4-27716 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Wäsche, Rolf A1 - Köhler, Norbert A1 - Nakase, Takuya A1 - Kato, Sh. T1 - Dry sliding couples with nearly zero wear - DLC vs. different ceramics T2 - Seminar on eco-friendly and highly loaded tribosystems CY - Tokyo, Japan DA - 2013-02-13 PY - 2013 AN - OPUS4-27717 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - International Standardisation of the SRV-Testing-Techniques T2 - Tokyo Univeristy of Science CY - Tokyo, Japan DA - 2013-02-12 PY - 2013 AN - OPUS4-27718 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Progris, R. A1 - Robbe-Valloire, F. A1 - Richard, J. A1 - Aye, J. A1 - Woydt, Mathias T1 - Biolubrifiants PY - 2013 SN - 978-2-85059-309-3 N1 - Serientitel: Techniques de l'ingénieur – Series title: Techniques de l'ingénieur SP - 139 EP - 152 PB - Editons TI CY - Paris AN - OPUS4-25589 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tamura, T. A1 - Hosohata, S. A1 - Nakase, T. A1 - Kato, S. A1 - Scholz, Christian A1 - Woydt, Mathias T1 - High wear resistance DLC film under high pressure contact T2 - 12. Machine design and tribology division meeting in JSME CY - Ehime-ken, Japan DA - 2012-04-23 KW - Diamond-like carbon KW - Slip-rolling test PY - 2012 SN - 1348-3919 N1 - Sprachen: Japanisch/Englisch - Languages: Japanese/English VL - 12-14 SP - 101 EP - 102 AN - OPUS4-25923 LA - mul AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Merryweather, St. A1 - Zweifel, D. T1 - DOW PAG engine oil - Fuel economy through engine oils based on polyalkylene glycols T2 - 3. Int. Exhaust Emissions Symposium and Celebrations to mark BOSMAL's 40th anniversary CY - Bielsko-Biala, Poland DA - 2012-05-24 PY - 2012 AN - OPUS4-25912 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Igartua, A. A1 - Fernandez, X. A1 - Woydt, Mathias A1 - Luther, R. A1 - Illarramendi, I. ED - Lakshminarayanan, P.A. ED - Nayak, N.S. T1 - Tribological tests to simulate wear on piston rings N2 - In order to reduce experimental effort, tribological tests are performed for coating selection, simulating the friction, wear and scuffing behaviour between the piston ring and cylinder liner, as well as lubricant evaluation. The creation of test standards in piston ring/cylinder liner simulation is discussed. PVD coatings, HVOF coatings and nitriding treatments have been applied to piston rings as alternative for chromium coatings. CrN/TiN coating seems very effective for increasing the wear and scuffing resistance. Biodegradable engine oils based on esters and polyglycols reduce friction and exceed the wear resistance of reference engine oils based on hydrocarbons for the new generation engines with high cylinder pressures. KW - Friction KW - HVOF KW - Chromium KW - CrN/TiN KW - Scuffing KW - Wear KW - Resistance KW - Tribo-system KW - Piston ring KW - Cylinder liner KW - SRV Test KW - Schwingung KW - Reibung KW - Verschleiß KW - Oscillation KW - Friction and Wear KW - Extreme pressure test KW - Coating KW - Physical vapour deposited coating (PVD) KW - High Pressure–High Velocity Oxi-fuel coating (HP-HVOF) KW - Friction coefficient KW - Wear scar KW - Lubricant KW - Bio-degradable lubricant KW - Ester KW - Glycol KW - Viscosity index KW - Viscosity grade KW - Thematic piston ring PY - 2011 SN - 978-0-470-82882-3 DO - https://doi.org/10.1002/9780470828847.ch11 IS - Chapter 11 SP - 167 EP - 195 PB - John Wiley & Sons AN - OPUS4-26253 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Scholz, Christian A1 - Spaltmann, Dirk A1 - Woydt, Mathias T1 - Höchstbelastbare Wälzkontakte mit geringer Misch-/Grenzreibungszahl KW - Hochzähe Stähle KW - Getriebekomponenten KW - DLC KW - ZrCN KW - Extrembeanspruchung KW - Dünnschichten KW - Polyglykole KW - Additive KW - Slip-rolling KW - High toughness steels KW - High pressure KW - Thin film coatings KW - Polyglycols KW - Additives PY - 2012 SN - 0724-3472 VL - 59 IS - 3 SP - 41 EP - 47 PB - Expert Verlag CY - Renningen AN - OPUS4-26232 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - The ways/paths to low friction, low wear and high load carrying capacities in gear and engines T2 - 7. Asia-Pacific Base Oil, Lubricant & Grease Conference CY - Bangkok, Thailand DA - 2013-03-11 PY - 2013 AN - OPUS4-27801 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Löhr, Manuel A1 - Spaltmann, Dirk A1 - Binkowski, Sigrid A1 - Woydt, Mathias T1 - Einfluss der Topographie von DLC-Schichten auf deren Verhalten unter geschmierter Wälzbeanspruchung KW - Diamant DLC KW - 100Cr6 KW - Wälzen KW - Paraffinöl KW - Topographie KW - Rasterkraftmikroskop PY - 2004 SN - 0724-3472 VL - 51 IS - 6 SP - 18 EP - 26 PB - Expert Verlag CY - Renningen AN - OPUS4-5142 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Spaltmann, Dirk A1 - Löhr, Manuel A1 - Binkowski, Sigrid A1 - Kelling, Norbert A1 - Woydt, Mathias T1 - Können harte DLC-Schichten die Wälzbeständigkeit von weichen Stählen erhöhen? T2 - Tribologie-Fachtagung 2004 CY - Göttingen, Deutschland DA - 2004-09-27 PY - 2004 SN - 3-00-015053-6 SP - 1(?) EP - 10(?) PB - Ges. für Tribologie CY - Moers AN - OPUS4-5143 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias T1 - Application de données tribologiques des matériaux PY - 2004 SN - 0399-4104 CY - Paris AN - OPUS4-5146 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias T1 - Ti-O - Ein Stoffsystem mit erscheinungsreichen tribologischen Eigenschaften N2 - Das ungeschmierte tribologische Verhalten von verschiedenen Stoichiometrien und mit unterschiedlichen Verfahren hergestellten Schichten und Werkstoffen im System Ti-O wird vorgestellt. Der Phasenreichtum geht einher mit dem gleichen Erscheinungsreichtum im tribologischen Verhalten. Obwohl aus den Stoffeigenschaften kaum erkennbar, offenbart das System Ti-O eine phasenweise herausragende Verschleißbeständigkeit, allerdings wurden Reibungszahlen von 0,2 kaum unterschritten. T2 - DGM-Tagung "Reibung und Verschleiß", Deutsche Gesellschaft für Materialkunde e.V. (DGM) CY - Fürth, Deutschland DA - 2004-03-10 PY - 2004 DO - https://doi.org/10.1002/mawe.200400800 SN - 0933-5137 SN - 1521-4052 VL - 35 IS - 10/11 SP - 817 EP - 823 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-5147 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Lifetime lubricated engines using triboreactive materials N2 - By means of an analysis of future trends in engine oil specifications with the associated consequences for the functional properties performed by base oils and individual additives, the need and potential application of alternative fluids and triboactive materials or lubricious oxides will be displayed. Oxidation resistance and low volatility represent key elements to assure long drains or lifetime lubrication in order to minimize or avoid manual or automatic top-ups. The intrinsic properties of base oils and the additive package define the oxidation resistance and related oxidative volatility. The overall engine oil consumption is also related to design (clearances, thermal stability of geometries, seals,...) and bore surface finishing and are not regarded here. Lubricious oxides or triboactive materials and/or polar base oils substitute the EP and AW properties realized by the additives, thus enabling long drains and responding to "eco-tox" or "bio-no-tox" requirements as well as restrictions from the "chemical box". T2 - RTO Applied Vehicle Technology Panel (AVT) specialists' meeting CY - Williamsburg, VA, USA DA - 2004-06-07 PY - 2004 N1 - Serientitel: RTO meeting proceedings : AVT – Series title: RTO meeting proceedings : AVT IS - 109 PB - NATO Research & Technology Organisation CY - Neuilly-sur-Seine AN - OPUS4-5150 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Ketting, M. A1 - Halama, H. A1 - Tomaszewski, J. T1 - Solid bonded films or monolithic ceramics in tracked chains of construction equipments for wear management N2 - Unlubricated tracked chains were realized using soft solid bonded films for the inner wear of the tribosystem of bushing/pin and monolithic ceramic bushings for the outer wear of the tribosystem bushing/sprocket. Both novel approaches were tested on D6 22-to. dozers. Selected solid bonded films and specific monolithic ceramics, offer a potential for simplifying the design, reducing weight and designing a dry-running longlife chain. These results can be further transferred to high-speed running gears or belt drives. T2 - RTO Applied Vehicle Technology Panel (AVT) specialists' meeting CY - Williamsburg, VA, USA DA - 2004-06-07 PY - 2004 UR - http://www.stormingmedia.us/93/9342/A934244.html N1 - Serientitel: RTO meeting proceedings : AVT – Series title: RTO meeting proceedings : AVT IS - 109 PB - NATO Research & Technology Organisation CY - Neuilly-sur-Seine AN - OPUS4-5151 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias ED - Kollenberg, W. T1 - Tribologisches Verhalten PY - 2004 SN - 3-8027-2927-7 SP - 76 EP - 85 PB - Vulkan CY - Essen AN - OPUS4-5154 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -