TY - JOUR A1 - Klaffke, Dieter T1 - Reibung und Verschleiß untersuchen - Prüftechnische Aspekte beim Schwingungsverschleiß KW - Reibung KW - Verschleiss KW - Schwingungsverschleiss PY - 1996 SN - 0025-5300 VL - 38 IS - 1-2 SP - 30 EP - 34 PB - Carl Hanser Verlag CY - München AN - OPUS4-660 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - On the repeatibibliy of friction and wear results and on the influence of humidity in oscillating sliding tests of steel - steel pairings KW - Reibung KW - Verschleiss KW - Reproduzierbarkeit PY - 1995 SN - 0043-1648 VL - 189 SP - 117 EP - 121 PB - Elsevier CY - Amsterdam AN - OPUS4-597 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter T1 - Wear of multiphase SiC based ceramic composites containing free carbon N2 - Ceramics are of increasing interest for application in many branches of technique. In order to improve the tribological performance of ceramic materials, composites on the basis of silicon carbide with different amounts of titanium carbide, boron carbide, titanium diboride and free carbon in the form of graphite were manufactured by a reaction sintering process. The friction and wear behaviour of these composites was investigated with oscillating sliding motion in unlubricated tests at room temperature on different levels of relative humidity. Additional tests were performed under water lubrication, revealing the superior behaviour of composites for special test conditions. A major influence of the free carbon on friction or wear behaviour was not observed. The tribological behaviour in air as well as under water is mainly dependant on the amount of titanium phases. KW - Siliziumkarbid KW - Verbundwerkstoffe KW - Tribooxidation KW - Silicon carbide KW - Ceramic composites KW - Humidity water KW - Lubrication PY - 2001 DO - https://doi.org/10.1016/S0043-1648(01)00566-X SN - 0043-1648 VL - 249 SP - 220 EP - 228 PB - Elsevier CY - Amsterdam AN - OPUS4-900 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Berger, Georg A1 - Hartelt, Manfred T1 - Tribologische Untersuchungen an anorganischen Implantatwerkstoffen PY - 2002 SN - 1616-0177 SN - 0011-8656 VL - 3 IS - 1 SP - 42 EP - 47 PB - Verl. Neuer Merkur CY - München AN - OPUS4-1332 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - Influence of Normal Force and Humidity on the Friction and Wear of Unlubricated Reciprocating Sliding Steel / Steel Couples KW - Reibung KW - Verschleiß KW - Normalkraft KW - Luftfeuchte KW - Reciprocating sliding KW - Stainless steel KW - Role reversal KW - Normal force KW - Relative humidity KW - Friction KW - Wear PY - 2004 SN - 1354-4063 SN - 1557-685X VL - 10 SP - 311 EP - 325 PB - Coppin CY - Deal AN - OPUS4-3764 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Berger, Georg A1 - Hartelt, Manfred T1 - Tribologische Untersuchungen an Ti-6Al-4V mit und ohne Calciumtitanat-Reaktionsschicht KW - Reibung KW - Verschleiß KW - Ti-6Al-4V KW - Calciumtitanat KW - Friction KW - Wear KW - Calcium titanate PY - 2004 SN - 1616-0177 SN - 0011-8656 VL - 5 IS - 2 SP - 67 EP - 70 PB - Verl. Neuer Merkur CY - München AN - OPUS4-3684 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Klaffke, Dieter T1 - Friction and Wear Behaviour of Hard Coatings in Vibrating Contacts N2 - The friction and wear behaviour of thin hard coatings, such as TiN and the promising class of C-based coatings (a-C, a-C:H, and diamond for example), are compared under oscillating and reciprocating sliding conditions. The typical effects of test parameters, such as stroke, frequency, normal force, relative humidity and test duration, are described as a basis for the proper selection of test conditions or, conversely, for the selection of suitable coatings for particular practical applications. Friction and wear data from over 1000 vibrating tests using thin hard coatings against 100Cr6 and against Al2O3 have been compiled in a database. This allows easy manipulation and comparison of test results. Using selection criteria and filter procedures (e. g., lifetime of coatings, friction limits, and critical wear rate), suitable coating systems for different test conditions can be chosen from the database. The effects of test parameters on friction and wear behaviour and changes have anyway to be known for meaningful tribotesting, as well as for the selection of coatings. KW - Tribotesting KW - Vibrating contacts KW - Friction KW - Wear KW - Running in KW - Hard coatings KW - TiN KW - Diamond-like carbon KW - DLC KW - Diamond KW - Operational parameters KW - Relative humidity KW - Surface analysis KW - Database PY - 1999 DO - https://doi.org/10.1002/tt.3020060206 SN - 1354-4063 SN - 1557-685X VL - 6-2 SP - 171 EP - 192 PB - Coppin CY - Deal AN - OPUS4-839 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - On the influence of some test parameters on the results of oscillating sliding tests N2 - The friction and wear behaviour of materials is often characterised in laboratory tests using a simple ball-on-flat configuration. From this type of test can be derived information useful in guiding the development of tribomaterials and in helping select candidate materials for specific applications. A large variety of tribotesting methods exists, and indeed several are not yet standardised. One of these methods is the oscillating sliding test, where a ball moves in relation to a disc, usually with small strokes. This method is almost non-destructive and can be applied to very small specimens. One of the most important parameters in laboratory tests is the humidity of the surrounding air. Experimental results on the friction and wear characteristics of different ceramics tested against different ball materials at room temperature in oscillating sliding contact are presented here and discussed, taking into account the effects of the test duration, relative humidity, and counterbody material. KW - Oscillating Sliding KW - Reibung KW - Verschleiß KW - Counterbody material KW - Ceramics KW - Testdauer KW - Feuchte PY - 1999 DO - https://doi.org/10.1002/tt.3020060104 SN - 1354-4063 SN - 1557-685X VL - 6-1 SP - 29 EP - 49 PB - Coppin CY - Deal AN - OPUS4-716 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Zeiler, E. A1 - Hiltner, K. A1 - Grögler, T. A1 - Rosiwal, S. A1 - Singer, R. T1 - Tribological performance of mechanically lapped chemical vapor deposited diamond coatings N2 - Polycrystalline diamond layers were deposited onto the titanium alloy Ti–6Al–4V via microwave plasma chemical vapor deposition (CVD). It is shown that the diamond film reduces wear and friction immensely compared with uncoated titanium/titanium tribo systems. An additional polishing process of the CVD-diamond layer improves the wear behavior even further. An influence of air humidity is found. In addition, different ceramic materials (Al2O3, SiC, Si3N4, ZrO2) were tested against as-deposited and polished CVD-diamond layers. Al2O3 and Si3N4 exhibit very good wear behavior accompanied by very low friction against as-deposited CVD-diamond. SiC and ZrO2, however, show somewhat inferior wear and friction behavior. Suggestions are made to explain the different performance. Again, a wear increase is found with increasing humidity. Polishing of CVD-diamond layers improves the tribological performance further. KW - CVD KW - Diamond KW - Polishing KW - Tribology PY - 1999 DO - https://doi.org/10.1016/S0257-8972(99)00136-X SN - 0257-8972 VL - 116-119 SP - 599 EP - 608 PB - Elsevier Science CY - Lausanne AN - OPUS4-721 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter T1 - Ceramic particulate composites in the system SiC-TiC-TiB2 sliding against SiC and Al2O3 under water N2 - The tribological behaviour of SiC, SiC-TiC and SiC-TiC-TiB2 was determined in oscillating sliding against SiC and -Al2O3 in water at room temperature. The tribo-systems with the composite materials containing TiC and TiB2 differ significantly from the systems with the single phase SiC: The wear is reduced and the friction is increased. The wear reduction up to a factor of 10 is mainly due to the formation of an oxide film containing titanium oxides which is soft, stable in water and well adhering to the bulk material. This oxide film is transferred to the alumina ball but not to the silicon carbide ball. KW - Silicon carbide KW - Titanium carbide KW - Titanium boride KW - Ceramic KW - Particulate composites KW - Oscillating sliding KW - Water lubrication KW - Friction KW - Wear PY - 1999 DO - https://doi.org/10.1016/S0301-679X(99)00033-X SN - 0301-679X VL - 32 IS - 4 SP - 197 EP - 206 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-1440 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Witke, Klaus A1 - Klaffke, Dieter A1 - Skopp, André A1 - Schreckenbach, J.P. T1 - Laser-Induced Transformation as a Tool for Structural Characterization of Materials by Raman Spectroscopy PY - 1998 SN - 0377-0486 SN - 1097-4555 VL - 29 SP - 411 EP - 415 PB - Wiley CY - Chichester AN - OPUS4-2308 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Klaffke, Dieter T1 - Aspects of tribological testing of diamond coatings PY - 1998 SN - 0257-8972 VL - 98 SP - 1027 EP - 1037 PB - Elsevier Science CY - Lausanne AN - OPUS4-2423 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Skopp, André T1 - Are thin hard coatings (TiN, DLC, diamond) beneficial in tribologically stressed vibrating contacts? - Effects of operational parameters and relative humidity PY - 1998 SN - 0257-8972 VL - 98 SP - 953 EP - 961 PB - Elsevier Science CY - Lausanne AN - OPUS4-2424 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Klaffke, Dieter A1 - Buchkremer-Hermanns, H. A1 - Ren, H. A1 - Weiß, H. T1 - Tribological behavior of MW PACVD diamond coatings in vibrating contacts KW - Diamond coatings KW - Chemical vapour deposition KW - MW PACVD KW - Vibrating contacts KW - Steel/diamond pairings KW - Running-in KW - Wear KW - SEM KW - EDX KW - LRS KW - AFM KW - Surfaces KW - Wear scar KW - Transfer layer KW - Debris PY - 1997 SN - 1354-4063 SN - 1557-685X VL - 4-1 SP - 3 EP - 27 PB - Coppin CY - Deal AN - OPUS4-2429 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Hartelt, Manfred T1 - Reibungs- und Verschleißuntersuchungen an Ti-6Al-4V in Wasser PY - 2003 SN - 0724-3472 VL - 50 IS - 1 SP - 24 EP - 29 PB - Expert Verlag CY - Renningen AN - OPUS4-2510 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 - JOUR A1 - Klaffke, Dieter A1 - Wäsche, Rolf A1 - Yarim, Rasim T1 - Tribological Behaviour of SiC-TiC-TiB2 Composites under Unlubricated Sliding Conditions KW - Silicon carbide KW - Titanium carbide KW - Titanium diboride KW - Alumina KW - Oscillating sliding KW - Relative humidity PY - 2003 SN - 1354-4063 SN - 1557-685X VL - 9-3 IS - 9 SP - 185 EP - 195 PB - Coppin CY - Deal AN - OPUS4-2486 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter A1 - Troczynski, T. T1 - Tribological performance of SiC and TiB2 against SiC and Al2O3 at low sliding speeds N2 - The friction and wear behaviour of a new developed, pressureless sintered TiB2 ceramic was studied in comparison to SiC against SiC and Al2O3 balls under unlubricated conditions at room temperature. Special attention was paid to the influence of relative humidity on friction and wear results. For both ceramics the coefficient of friction against both ball materials decreases with increasing humidity and is higher in tests against alumina than against SiC. The wear rate is affected significantly by humidity and decreases by one order of magnitude for Al2O3/SiC system and by 2 orders of magnitude for SiC/SiC system. For TiB2 wear rates are nearly not affected by humidity against both ball materials and are much smaller than for SiC. KW - Titanium diboride KW - Friction KW - Wear KW - Relative humidity KW - Counter body material PY - 2004 DO - https://doi.org/10.1016/S0043-1648(03)00444-7 SN - 0043-1648 VL - 256 SP - 695 EP - 704 PB - Elsevier CY - Amsterdam AN - OPUS4-3481 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - Fundamentals of Tribotesting N2 - Tribology is an experiment-oriented branch of a complex, interdisciplinary science, in which testing plays a major role in the solution of technical problems, in the field as well as in the development of tribomaterials. Various test methods are used for this purpose, and the results are sensitive to the choice of test method and test conditions. In this paper, the effects of test parameters on friction and wear results are considered, some selected results of model tests with different types of materials are presented, and guidelines are derived, that help improve the reliability and level of confidence of tribological tests performed in laboratories. KW - Friction KW - Wear KW - Test methods KW - Parameter effects KW - Humidity PY - 2000 DO - https://doi.org/10.1002/tt.3020060406 SN - 1354-4063 SN - 1557-685X VL - 6 IS - 4 SP - 373 EP - 385 PB - Coppin CY - Deal AN - OPUS4-1004 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Hartelt, Manfred T1 - Stick-Slip-Untersuchungen an keramischen Werkstoffen PY - 2000 DO - https://doi.org/10.1002/1521-4052(200008)31:8<790::AID-MAWE790>3.0.CO;2-4 SN - 0933-5137 SN - 1521-4052 IS - 31 SP - 790 EP - 793 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-996 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Yarim, Rasim A1 - Wäsche, Rolf T1 - Effect of Pre-oxidation on Friction and Wear Behaviour of a SiC-TiC-TiB2 composite PY - 2003 VL - 22 SP - 12 EP - 20 PB - Metallilaboratorio CY - Espoo AN - OPUS4-2517 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - Test Concept for Tribological Characterisation of Implant Materials Prone to Fretting PY - 2003 VL - 22 SP - 3 EP - 11 PB - Metallilaboratorio CY - Espoo AN - OPUS4-2518 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Yarim, Rasim A1 - Wäsche, Rolf T1 - Einfluss einer Voroxidation auf das tribologische Verhalten keramischer Komposits KW - SiC KW - TiC KW - TiB2 KW - Kompositkeramik KW - Reibung KW - Schwingungsverschleiß KW - Randzone KW - Luftfeuchte PY - 2003 SN - 0724-3472 VL - 50 IS - 2 SP - 34 EP - 39 PB - Expert Verlag CY - Renningen AN - OPUS4-2536 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - Influence of Test Parameters on Friction and Wear Results Obtained in Oscillating Sliding Tests with 100Cr6 Steel against SiC-based Materials KW - Friction KW - Wear KW - Steel KW - Silicon carbide KW - Frequency KW - Load KW - Stroke KW - Relative humidity PY - 2003 SN - 1354-4063 SN - 1557-685X VL - 10-1 IS - 10 SP - 19 EP - 32 PB - Coppin CY - Deal AN - OPUS4-3130 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter A1 - Yarim, Rasim A1 - Santner, Erich T1 - Tribological Tayloring of Ceramic Composites N2 - With respect to their excellent material properties ceramics are of interest as candidate materials for tribological applications. The friction and wear behaviour of ceramics is often superior to that of metallic materials. Furthermore, an essential improvement of tribological performance will be possible by tailoring of ceramics in the process of powder preparation and sintering technique. Silicon Carbide (SiC) shows interesting friction and wear behaviour at room temperature, even under unlubricated running conditions but is very sensitive against effects of environmental humidity and shows high friction and high wear in the absence of water vapour. The tribological performance of SiC can be improved considerably by adding substantial amounts of TiC and TiB2 to the microstructure thus creating ceramic particulate composite materials. Various composites in the quasi ternary system SiC-TiC-TiB2 were prepared by a ceramic manufacturing process including sintering temperatures up to 2180 °C. Comparative tribo tests were performed under unlubricated oscillating sliding motion in dry, normal, and moist air and under water lubrication with SiC balls and Al2O3 balls as counter bodies. The friction is affected by the relative humidity (RH) but barely at all by the composition of the composites. The wear resistance of the composites was found to be improved considerably by addition of TiB2 in the range from 20 to 60 %. The highest wear resistance of the system wear was found when Al2O3 was used as counter body material. PY - 2003 DO - https://doi.org/10.1002/mawe.200300688 SN - 0933-5137 SN - 1521-4052 VL - 34 IS - 10/11 SP - 1008 EP - 1013 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-3132 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Hartelt, Manfred A1 - Brand, J. A1 - Brand, C. A1 - Wittorf, R. T1 - Reibungs- und Verschleißverhalten von a-C:H-Schichten unter mediengeschmierten Bedingungen KW - Reibung KW - Verschleiß KW - Kohlenstoffschichten KW - Schmierstoff PY - 2004 SN - 0724-3472 VL - 51 IS - 3 SP - 25 EP - 29 PB - Expert Verlag CY - Renningen AN - OPUS4-3782 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Sander, Harro A1 - Hartelt, Manfred T1 - Influence of Temperature and Relative Humidity on the Friction and Wear of Unlubricated Reciprocating Sliding Steel / Steel Couples KW - Reibung KW - Verschleiß KW - Temperatur KW - Schallemission KW - Elektrischer Widerstand KW - Luftfeuchte KW - Friction KW - Wear KW - Reciprocating sliding KW - Relative humidity KW - Temperature KW - Steel couples PY - 2004 SN - 1354-4063 SN - 1557-685X VL - 10-4 IS - 10 SP - 327 EP - 346 PB - Coppin CY - Deal AN - OPUS4-3783 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Witke, Klaus A1 - Klaffke, Dieter A1 - Schneider, Thomas A1 - Schreckenbach, J.P. T1 - Laser-damaging as a useful tool for materials characterization by Raman microscopy KW - Raman-Mikroskopie KW - Raman-Laser KW - Laserstrahlbearbeitung PY - 1999 SN - 0169-4332 SN - 1873-5584 VL - 151 IS - 1-2 SP - 33 EP - 39 PB - North-Holland CY - Amsterdam AN - OPUS4-709 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Hartelt, Manfred A1 - Koesling, Frank-Peter T1 - Keramische Werkstoffe tribologisch charakterisieren KW - Tribobeanspruchung bei reversierendem Gleiten PY - 1999 SN - 0025-5300 VL - 41 IS - 7-8 SP - 286 EP - 293 PB - Carl Hanser Verlag CY - München AN - OPUS4-793 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter T1 - High temperature tribological behaviour of particulate composites in the system SiC-TiC-TiB2 during dry oscillating sliding KW - Ceramic Composites KW - High temperatures KW - Tribo-oxidation KW - Dry-slidins KW - Friction KW - Wear PY - 1999 SN - 1225-9381 VL - 5 IS - 2 SP - 155 EP - 161 PB - Han'guk-Seramik-Hakhoe CY - Seoul AN - OPUS4-761 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Zeiler, E. A1 - Grögler, T. A1 - Hiltner, K. A1 - Rosiwal, S.M. A1 - Singer, R.F. T1 - Tribologische Untersuchungen an Mikrowellenplasma-CVD-Diamant-Beschichtungen auf Ti-6Al-4V im Kontakt mit Keramik KW - Tribologie KW - CVD KW - Diamant-Beschichtungen KW - Keramik KW - Polieren PY - 1999 SN - 0724-3472 N1 - Sprachen: Deutsch/Englisch - Languages: German/English VL - 46 IS - 5 SP - 45 EP - 49 PB - Expert Verlag CY - Renningen AN - OPUS4-722 LA - mul AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - Möglichkeiten und Grenzen von Reibungs- und Verschleißprüfungen PY - 2001 SN - 0016-4232 VL - 92 IS - 8 SP - 2192 EP - 2203 PB - Leuze CY - Saulgau, Württ. AN - OPUS4-1138 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Griepentrog, Michael A1 - Klaffke, Dieter T1 - Microstructural characterization of wear particles formed during tribological stressing of TiC and Ti(C,N) coatings N2 - An attempt was undertaken to obtain a better understanding of the tribological properties of two wear-resistant coatings on tool steel by structural and microchemical analysis of wear particles using a transmission electron microscope. Coatings were deposited by physical vapor deposition and plasma-assisted chemical vapor deposition techniques and tribological properties were derived from reciprocating sliding tests of the coatings against alumina balls. Three types of wear particles were identified by electron diffraction and energy dispersive X-ray spectroscopy: nanocrystalline rutile (TiO2), nanocrystalline graphite and microcrystalline graphite. Low coefficients of friction, of the order of 0.2, were attributed to the formation of solid lubricant films of sub-stoichiometric TiO2-x Magnéli phases and/or graphite. KW - Third body KW - Solid lubrication KW - Coating, debris KW - Wear particle KW - TEM PY - 2002 DO - https://doi.org/10.1023/A:1015491027710 SN - 1023-8883 SN - 1573-2711 VL - 12 IS - 4 SP - 229 EP - 234 PB - Springer Science Business Media B.V. CY - Dordrecht AN - OPUS4-1379 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter A1 - Czichos, Horst T1 - Wear behaviour of i-carbon coatings PY - 1992 SN - 0043-1648 VL - 153 SP - 149 EP - 162 PB - Elsevier CY - Amsterdam AN - OPUS4-1428 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Dück, Alexander A1 - Griepentrog, Michael A1 - Klaffke, Dieter T1 - Entwicklung und Charakterisierung von Mehrlagen-Schichtsystemen für die Trockenbearbeitung PY - 2001 SN - 0017-6583 SN - 0341-101X VL - 56 IS - 3 SP - 161 EP - 165 PB - Hanser CY - München AN - OPUS4-2369 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Skopp, André A1 - Lenke, I. T1 - Tribological characterization of coatings by oscillating sliding testing PY - 1995 SN - 0257-8972 VL - 74-75 SP - 877 EP - 883 PB - Elsevier Science CY - Lausanne AN - OPUS4-2416 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Klaffke, Dieter A1 - Buchkremer-Hermanns, H. A1 - Ren, H. A1 - Weiß, W. T1 - Tribotest journalTribological behavior of MW PACVD diamond coatings in vibrating contacts PY - 1997 SN - 1354-4063 SN - 1557-685X VL - 4-1 SP - 3 EP - 27 PB - Coppin CY - Deal AN - OPUS4-2420 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - Reibungs- und Verschleißuntersuchungen an Kohlenstoffschichten PY - 2004 SN - 0075-2819 VL - 60 SP - 226 EP - 239 PB - Leuze CY - Bad Saulgau AN - OPUS4-3627 LA - deu 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 - 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 - JOUR A1 - Klaffke, Dieter A1 - Brand, J. A1 - Brand, C. A1 - Wittorf, R. A1 - Hartelt, Manfred T1 - Tribologische Charakterisierung metalldotierter DLC-Schichten KW - Reibung KW - Verschleiß KW - Kohlenstoffschichten KW - Metalldotierung KW - Luftfeuchte PY - 2004 SN - 0724-3472 VL - 51 IS - 4 SP - 15 EP - 19 PB - Expert Verlag CY - Renningen AN - OPUS4-4399 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schneider, Thomas A1 - Klaffke, Dieter A1 - Hartelt, Manfred T1 - Einfluss verschiedener Prüfparameter auf das tribologische Verhalten von a-C:H-Schichten bei oszillierender Gleitbewegung KW - Reibung KW - Verschleiß KW - Normalkraft KW - Temperatur KW - Luftfeuchte PY - 2005 SN - 0724-3472 VL - 52 IS - 3 SP - 12 EP - 18 PB - Expert Verlag CY - Renningen AN - OPUS4-10538 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Hartelt, Manfred A1 - Brand, C. A1 - Brand, J. A1 - Wittorf, R. T1 - Einfluss der Temperatur auf das tribologische Verhalten von DLC-Schichten N2 - Diamantähnliche Kohlenstoffschichten (DLC) zeichnen sich durch ein sehr günstiges Reibungs- und Verschleißverhalten aus. Auf vielen Werkzeugen und hochbelasteten Bauteilen ist DLC daher bereits erfolgreich im Einsatz. In naher Zukunft wird die Bedeutung dieser Schichten als Oberflächenschutz in tribologischen Systemen weiter ansteigen. Wie viele Applikationsbeispiele zeigen, ist die Leistungsfähigkeit von DLC als Schicht zur Verringerung von Reibung und Verschleiß zwar groß, weist aber auch Grenzen auf. Vor allem bei höheren Temperaturen (> 300 °C) treten Strukturveränderungen oder sogar Oxidationsvorgänge auf, die auch die tribologischen Eigenschaften der Schichten verschlechtern können. Reibungs- und Verschleißuntersuchungen (Schwingungsverschleiß) von DLC-Schichten wurden im Temperaturbereich von 25 °C bis 250 °C durchgeführt und zeigen ein schnelleres Durchreiben der Schicht bei höheren Temperaturen. Die Lebensdauer der Schichten wird mit zunehmender Prüftemperatur reduziert. Einsatzgrenzen für DLC-Schichten können abgeleitet werden. T2 - DGM-Tagung "Reibung und Verschleiß" CY - Fürth, Deutschland DA - 2004-03-10 KW - Friction KW - Wear KW - DLC KW - Temperature KW - Thermal resistance PY - 2004 DO - https://doi.org/10.1002/mawe.200400795 SN - 0933-5137 SN - 1521-4052 VL - 35 IS - 10/11 SP - 936 EP - 941 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-4662 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Wäsche, Rolf A1 - Janakiraman, N. A1 - Aldinger, F. T1 - Tribological characterisation of siliconcarbonitride ceramics derived from preceramic polymers N2 - Amorphous SiCN ceramics were prepared in a laboratory scale as disk shaped specimens with 10 mm diameter and 0.3 mm thickness. The friction and wear behaviour was characterised in gross slip fretting tests under unlubricated conditions at room temperature against steel (100Cr6) and ceramic (Al2O3). Tests with a ball-on-disk contact were performed in laboratory air with different content of water vapour. The results show clearly that the relative humidity has a significant effect on friction and wear behaviour. All tests in dry air lead to higher friction and higher wear rate than in normal air. Improved friction and wear behaviour was observed with increasing pyrolysis temperature up to 1100 °C of the SiCN specimens. This is attributed to increasingly better mechanical properties and higher stiffness of the amorphous network due to the evaporation of gaseous organic species and the formation of free graphite like carbon. KW - Ceramics KW - Preceramic polymer KW - Siliconcarbonitride KW - Friction KW - Wear PY - 2006 DO - https://doi.org/10.1016/j.wear.2005.04.031 SN - 0043-1648 VL - 260 IS - 7-8 SP - 711 EP - 719 PB - Elsevier CY - Amsterdam AN - OPUS4-12302 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Maennig, W. A1 - Westphal, K. T1 - Wechselbiegeapparatur für die in situ-Untersuchung von Zerrüttungsvorgängen im Rasterelektronenmikroskop - Specimen Support for the in Situ Observation of Bending Fatigue PY - 1979 SN - 0161-0457 SN - 1932-8745 VL - 2 IS - 3 SP - 129 EP - 134 PB - Wiley CY - Hoboken, NJ AN - OPUS4-9146 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Maennig, W. T1 - Dynamische Untersuchung von Dauerschwingproben im Rasterelektronenmikroskop (Kurzfassung) PY - 1975 SN - 0025-5300 VL - 17 IS - 6 SP - 180 PB - Carl Hanser Verlag CY - München AN - OPUS4-8301 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Beck, Uwe T1 - Tribological and mechanical investigation of SiO2 and Si3N4 coatings on fused silica and borosilicate glass N2 - Amorphous SiO2 and Si3N4 plasma-enhanced chemical vapour deposited (PECVD) coatings were deposited on two different substrate materials (fused silica and borosilicate glass), with three coating thicknesses (0.1, 0.5, and 1.0 µm). The mechanical properties (hardness and elastic modulus) were determined by depth-sensing indentation, with loads from 700 mN down to 0.1 mN. Tribological behaviour was studied in instrumented oscillating sliding tests at room temperature with a ball-on-flat arrangement, in which the coated disc was tested against an alumina ball, at a load of 1 N. Interpretation of the measurement of hardness and modulus of the coatings has to take into consideration the influence of layer thickness and the effect of the substrate. Tensile film stress and crack generation were only observed for Si3N4 on fused silica above a threshold thickness. Friction and wear measurements show that the coating has an effect on friction, while wear is affected by the thin coatings only for a short running-in phase. The morphology of the wear scars indicates that the coatings have good adhesion. Despite crack generation, delamination effects were not observed. Indentation patterns similarly showed excellent lateral homogeneity of the mechanical properties over the entire film surface, and indicated that load-displacement curves may be used to characterise the system. KW - Mechanical properties KW - SiO2 coating KW - Si3N4 coating KW - Depth-sensing indentation KW - Oscillating sliding test KW - Friction KW - Wear KW - PECVD PY - 2001 DO - https://doi.org/10.1002/tt.3020080105 SN - 1354-4063 SN - 1557-685X VL - 8 IS - 1 SP - 57 EP - 72 PB - Coppin CY - Deal AN - OPUS4-25598 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Klaffke, Dieter A1 - Griepentrog, Michael A1 - Gross, U. A1 - Kranz, I. A1 - Knabe, Ch. T1 - Potential of wear resistant coatings on Ti-6Al-4V for artificial hip joint bearing surfaces N2 - Tribological screening tests (simple, reciprocating ball-on-flat tests) were performed with the objective to identify an appropriate coating for the articulating surfaces of artificial hip joints whose acetabular cups and femoral stems are made from Ti–6Al–4V alloy, which is appreciated for its light weight, good biocompatibility and elastic properties similar to those of natural bone. Standard coatings like TiN or CrN performed better than more complicated multi-layer systems, though not as good as different types of amorphous carbon coatings, generally referred to as diamond-like carbon or DLC coatings. Among the latter, hydrogenated amorphous carbon (a-C:H) displayed the best properties, especially if the hydrogen content was increased by reducing the bias voltage during PA-CVD-deposition. The optimised a-C:H coating revealed the most promising wear behaviour under the applied testing conditions, i.e. the increase of linear wear with the number of cycles was close to zero. Regarding the materials examined in this study, correlation of wear with mechanical properties obtained by nano-indentation revealed that high hardness was not an adequate criterion for selecting appropriate coatings. A high ratio of hardness and elastic modulus (H/E) proved to be more important. Microstructural and micro-analytical investigations revealed transformation of TiN and CrN to TiO2 and Cr2O3, respectively, and amorphous carbon was, at least partly, transformed to graphite. Furthermore, incorporation of Al2O3 from the ball was observed at a very fine scale. The wear debris of favourable coatings always formed agglomerates of nano-scale particles. It was shown that commercial nano-particles of Al2O3, Cr2O3 and carbon black are comparable to particles generated by the tribological tests. However, it is uncertain whether they are comparable to those formed during simulator studies or in vivo. Furthermore, the performance of the favourable coating has to be tested in a hip joint simulator before its potential for application in prostheses can be assessed. KW - Coating KW - Implant KW - Titanium alloy KW - DLC KW - Wear debris KW - Nano-particles PY - 2008 DO - https://doi.org/10.1016/j.wear.2007.04.001 SN - 0043-1648 VL - 264 IS - 7-8 SP - 505 EP - 517 PB - Elsevier CY - Amsterdam AN - OPUS4-16711 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Santner, Erich A1 - Spaltmann, Dirk A1 - Woydt, Mathias T1 - Influences on the tribological behaviour of slip-rolling DLC-coatings N2 - Diamond like carbon (DLC)-coatings are applied very successfully on computer discs. Sliding friction tests confirm their high performance as dry lubricants with friction coefficients (COFs) below 0.1. In contrast to sliding tests, until very recently most of the DLC-coatings failed in slip-rolling test after fewer cycles than uncoated samples. However, present tests with DLC-coatings of seven different suppliers show a more promising tribological behaviour under slip-rolling conditions. The DLC-coatings were deposited onto steel 100Cr6, HRC 60, with a thickness of 2–3 ?m. The counter bodies were uncoated, grinded or polished 100Cr6 discs with 30 mm radius of curvature. The tests were performed on a twin disc testing rig (Amsler type) with paraffin oil under boundary/mixed lubrication and rolling with 10% slip. The initial, average Hertzian contact pressure was adjusted to Pm = 1.0, 1.25, and 1.5 GPa. The failure criterion was defined as the occurrence of a single damaged area larger than 1 mm2, which was controlled by optical microscopy (OM). An acoustic emission (AE) measurement system was installed as an additional online control for coating failure. The stressed coatings and the chipping areas were analyzed by OM, SEM, EDX, AFM and Raman spectroscopy. Until now, the results reveal that a large scatter in lifetime of coatings occurs not only between samples of different coaters but also between the samples of one single batch. The highest lifetime reached by a DLC-coating under these testing conditions is 10 × 106 cycles. That is the highest life time for a coating tested under the testing conditions above in our laboratory so far. The following factors were identified to influence the life time of the coatings: coating thickness, interlayer type, topography of the coatings, counter body roughness and mechanical properties. But the most important factor determining the life time of the coatings is that the coating process does produce homogenous layers free of faults. KW - DLC-coatings KW - Slip-rolling KW - Life time KW - Acoustic emission PY - 2005 DO - https://doi.org/10.1016/j.wear.2005.01.008 SN - 0043-1648 VL - 259 SP - 752 EP - 758 PB - Elsevier CY - Amsterdam AN - OPUS4-7557 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Maennig, Wolfgang-Werner A1 - Sander, Harro T1 - Magnetische und rasterelektronenmikroskopische Untersuchung von Zerrüttungsvorgängen - ein Beitrag zur interdisziplinären Bearbeitung von Schwingfestigkeitsproblemen PY - 1977 SN - 0025-5300 VL - 19 IS - 8 SP - 322 EP - 331 PB - Carl Hanser Verlag CY - München AN - OPUS4-8737 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Czichos, Horst A1 - Klaffke, Dieter A1 - Santner, Erich A1 - Woydt, Mathias T1 - Advances in tribology: the materials point of view PY - 1995 SN - 0043-1648 VL - 190 SP - 155 EP - 161 PB - Elsevier CY - Amsterdam AN - OPUS4-9560 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Gräber, H.-G. A1 - Klaffke, Dieter T1 - Tribologische Untersuchung zum Verschleißverhalten von keramischen Zahnersatzwerkstoffen KW - Dentalkeramik KW - Bearbeitbarkeit KW - Zwischenmedium KW - pH-Wert KW - Dental ceramic KW - Machinability KW - Liquid media KW - pH-value PY - 2007 SN - 0724-3472 VL - 54 IS - 3 SP - 29 EP - 32 PB - Expert Verlag CY - Renningen AN - OPUS4-15737 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kloß, Heinz A1 - Klaffke, Dieter T1 - Untersuchungen und Modellrechnungen für eine Verschleißprognose metallischer Werkstoffe KW - Metalle KW - Verschleißprognose KW - Kontaktmechanik KW - Oberflächentopographie KW - Scherenergiedichte PY - 2006 SN - 0724-3472 VL - 53 IS - 6 SP - 14 EP - 17 PB - Expert Verlag CY - Renningen AN - OPUS4-14798 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Urchegui, M.A. A1 - Hartelt, Manfred A1 - Klaffke, Dieter A1 - Gómez, X. T1 - Laboratory fretting tests with thin wire specimens KW - Wires KW - Fretting KW - Friction test KW - Unlubricated friction PY - 2007 SN - 1354-4063 SN - 1557-685X VL - 13 SP - 67 EP - 81 PB - Coppin CY - Deal AN - OPUS4-14781 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Maennig, W. T1 - Beobachtung und Orientierungsbestimmung der Oberflächenkristallite polykristalliner Al-99,999-Proben bei Biegewechselbeanspruchung PY - 1980 SN - 0025-5300 VL - 22 IS - 2 SP - 65 EP - 74 PB - Carl Hanser Verlag CY - München AN - OPUS4-9388 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Schultrich, B. A1 - Weihnacht, V. T1 - Tribological behaviour of ta-C coatings under water lubricated conditions KW - Friction KW - Wear KW - ta-C coatings KW - Water lubrication PY - 2005 UR - http://www.om.ugal.ro/AnnalsFasc8Tribology/pdf/2005/4-Annals2005-2-Klaffke.pdf SN - 1221-4590 SN - 1220-0824 SP - 24 EP - 28 CY - Gala¸ti AN - OPUS4-12361 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter A1 - Steinborn, Gabriele T1 - Tribological testing of Ca-Ba infiltrated zirconia KW - Friction KW - Wear KW - Ca-Ba fluoride KW - Infiltration KW - Porous zirconia PY - 2005 UR - http://www.om.ugal.ro/AnnalsFasc8Tribology/pdf/2005/9-Annals2005-3-Wasche.pdf SN - 1221-4590 SN - 1220-0824 SP - 53 EP - 59 CY - Gala¸ti AN - OPUS4-12365 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Maennig, Wolfgang-Werner T1 - Umformverhalten von Rein- und Reinstaluminium bei Biegewechselbeanspruchung (I) PY - 1982 SN - 0002-6689 VL - 58 IS - 4 SP - 221 EP - 225 PB - Giesel CY - Isernhagen AN - OPUS4-36321 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Maennig, Wolfgang-Werner T1 - Umformverhalten von Rein- und Reinstaluminium bei Biegewechselbeanspruchung (II) PY - 1982 SN - 0002-6689 VL - 58 IS - 5 SP - 271 EP - 276 PB - Giesel CY - Isernhagen AN - OPUS4-36322 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Santner, Erich A1 - Klaffke, Dieter A1 - Meine, Kerstin A1 - Polaczyk, Christoph A1 - Spaltmann, Dirk T1 - Demonstration of topography modification by friction processes and vice versa N2 - Contact formation and development are the basis of friction and wear modelling and understanding. Unanimously topography formation and development in friction contacts are regarded of highest importance for understanding and modelling friction processes. The frequently found running in behaviour of sliding contacts is—aside from the build up of reaction and transfer layers-at least partly caused by the topography development due to friction processes until a stable equilibrium state is reached. Experimental results of friction and topography measurements are presented which demonstrate the mutual modification of friction and contact topography. A special experimental set up with an AFM allowed to correlate the measured friction forces with the contact position and the topography at this point. In this way, friction force transitions and changes can be assigned to topography changes due to abrasion, adhesion and wear particle agglomeration. Contact surfaces with artificial regular structures have been prepared to avoid problems with topography and friction correlation due to the statistical nature of roughness on technical contact surfaces. The friction effects of roughness were simulated by etched ditches of defined width, depth and distance on silicon or metal surfaces. This allowed to explain the mutual influences of topography and friction. The effect of a single ‘asperity’ and of the 'roughness structures' could be demonstrated. Topography measurements with an AFM correlated with the friction force could help to understand friction changes without changing any parameter. KW - Friction KW - Roughness KW - Topography KW - Adhesion KW - Wear PY - 2006 DO - https://doi.org/10.1016/j.triboint.2005.04.029 SN - 0301-679X VL - 39 SP - 450 EP - 455 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-31744 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Klaffke, Dieter A1 - Wötting, G. T1 - Tribological behaviour of structural Si-based ceramics in fretting tests at room temperature N2 - The friction and wear behaviour of SiC, Si3N4 and SiC/Si3N4 composite ceramics were investigated with oscillating sliding (gross slip fretting) at room temperature. The influence of counter body material and the humidity of the surrounding air was studied with a ball-on-disc configuration with different ball materials (1000Cr6, Al2O3 SiC and Si3N4). The effect of RH on friction is marginal with exception of SiC (low friction) as counter body material. The wear behaviour, however, is strongly affected by humidity, showing inverse trends for different counter body materials. Consequently, the wear behaviour of a tribo couple can be improved by selecting an adequate mating material. The results reveal the necessity to control RH in tribological tests. For estimation of the performance of tribo couples under varying environmental conditions, a variation of RH is required. In tribo couples with single phase SiC, either as ball or disc, the tribological behaviour of the system is dominated by SiC. The friction behaviour of the composite material is in between the behaviour of the two single phase materials, Si3N4 and SiC, whereas the wear behaviour is very similar to that of single phase Si3N4. KW - Silicon carbide KW - Silicon nitride KW - Particulate composite KW - Fretting KW - Humidity KW - Mating material PY - 2009 DO - https://doi.org/10.1007/s11249-009-9413-y SN - 1023-8883 SN - 1573-2711 VL - 33 IS - 3 SP - 211 EP - 219 PB - Springer Science Business Media B.V. CY - Dordrecht AN - OPUS4-19000 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gemeinert, Marion A1 - Dörfel, Ilona A1 - Griepentrog, Michael A1 - Gross, U. A1 - Klaffke, Dieter A1 - Knabe, C. A1 - Kranz, I. A1 - Österle, Werner T1 - Biological response to micron- and nanometer-sized particles known as potential wear products from artificial hip joints: Part I: Selection and characterization of model particles KW - Hip joint endoprostheses KW - Wear products KW - Particle size distribution KW - Model particles KW - Dispersing behavior of particles PY - 2009 DO - https://doi.org/10.1002/jbm.a.31952 SN - 1549-3296 SN - 1552-4965 VL - 89A IS - 2 SP - 379 EP - 389 PB - Wiley CY - Hoboken, NJ AN - OPUS4-19345 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kranz, I. A1 - Gonzalez, J.B. A1 - Dörfel, Ilona A1 - Gemeinert, Marion A1 - Griepentrog, Michael A1 - Klaffke, Dieter A1 - Knabe, C. A1 - Österle, Werner A1 - Gross, U. T1 - Biological response to micron- and nanometer-sized particles known as potential wear products from artificial hip joints: Part II: Reaction of murine macrophages to corundum particles of different size distributions KW - Macrophages KW - Cytokines KW - Nanoparticles (NP) KW - Microparticles (MP) KW - Corundum PY - 2009 DO - https://doi.org/10.1002/jbm.a.32121 SN - 1549-3296 SN - 1552-4965 VL - 89A IS - 2 SP - 390 EP - 401 PB - Wiley CY - Hoboken, NJ AN - OPUS4-19346 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter T1 - Fretting wear of ceramic-steel - the importance of wear ranking criteria PY - 1985 SN - 0043-1648 VL - 104 SP - 337 EP - 343 PB - Elsevier CY - Amsterdam AN - OPUS4-34129 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Kuntze, Gerd T1 - Wechselbiegmaschine für Ermüdungsuntersuchungen ohne und mit Reibbeanspruchung PY - 1985 SP - 18 EP - 19 PB - GIT-Verl. CY - Darmstadt AN - OPUS4-34130 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Yarim, Rasim A1 - Klaffke, Dieter A1 - Hartelt, Manfred T1 - Oscillating sliding wear behaviour of SiC, TiC, TiB2, 59SiC-41TiB2 and 52SiC-24TiC-24TiB2 materials up to 750°C in air N2 - The tribological behaviour of different monolithic and composite ceramics was evaluated in the temperature range between room temperature and 750°C. The test method was oscillating sliding with a ball-on-disk arrangement in an SRV machine. Alumina balls were used as counter body. The friction behaviour was determined on-line, and the wear behaviour was determined from calculations on the basis of wear scar dimensions and profilometric measurements. The friction depends on temperature and shows an increase for most materials for increasing temperature; the smallest friction at all temperatures is found for monolithic TiC. The wear behaviour shows different trends for the different materials. In tests against SiC a maximum of wear is found at 500°C, for TiC at 200°C and for TiB2 at 750°C. The composite ceramics suffer the smallest wear of all materials in the range from 200°C to 500°C. PY - 2006 DO - https://doi.org/10.1002/tt.8 SN - 1354-4063 SN - 1557-685X VL - 12 SP - 99 EP - 111 PB - Coppin CY - Deal AN - OPUS4-32977 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -