TY - CONF A1 - Wäsche, Rolf T1 - Experimental study on wear of dental ceramic materials - tests in artificial saliva T2 - 17. International Colloquium on Tribology CY - Filderstadt, Germany DA - 2010-01-19 PY - 2010 AN - OPUS4-22873 LA - deu 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 - Wäsche, Rolf A1 - Paulick, Carl A1 - Steinborn, Gabriele A1 - Richter, V. A1 - Werner, M. T1 - Joining of ceramic components in the green state via LPIM N2 - It has been successfully demonstrated that ceramic materials can be joined in the green state without a second phase by using low pressure injection molded parts. The investigation of the joining interface revealed that a high quality interface can be achieved by carefully adjusting the different manufacturing steps. The use of monomodal particle size distribution in the used powder CT3000SG is inferior to a broader particle size distribution obtained by replacing 33% of the finer alumina powder by coarser CT1200SG. In this way the dewaxing process is significantly improved when the wall thickness of the part exceeds 3 mm. The investigation of the mechanical properties of the joined and sintered parts revealed, that the bending strength of the joined specimens achieved about 80 % of the unjoined, monolithic specimens. T2 - 4th International Conference on Advanced Materials and Processing CY - Hamilton, New Zealand DA - 2006-12-10 KW - Joining KW - Ceramics KW - Green state KW - Interface KW - Bending strength KW - Low pressure injection molding PY - 2005 UR - http://www.scientific.net/3-908453-89-5/207/ SN - 1022-6680 SN - 1662-8985 VL - 29-30 SP - 207 EP - 210 PB - Trans Tech Publ. CY - Zurich AN - OPUS4-19001 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Hartelt, Manfred A1 - Wäsche, Rolf T1 - Volumetrische Verschleiß-Berechnung an gekrümmten Kontaktgeometrien T2 - 50. Tribologie-Fachtagung - Reibung, Schmierung und Verschleiß - Forschung und praktische Anwendung CY - Göttingen, Deutschland DA - 2009-09-21 KW - Verschleißberechnung KW - Calculation of wear volume PY - 2009 SN - 978-3-00-028824-1 VL - I SP - 3-1 - 3-9 CY - Aachen AN - OPUS4-20023 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Hartelt, Manfred A1 - Weihnacht, V. T1 - Influence of counterbody material on wear of ta-C coatings under fretting conditions at elevated temperatures N2 - The high temperature tribological performance of tetrahedral amorphous carbon coatings has been analyzed at elevated temperatures up to 250 °C in air against three different counterbody materials-steel 100Cr6, a-alumina and silicon nitride. The results show that the counterbody material influences the friction and wear behavior and therefore coating life time strongly. This effect is well known for these coatings at room temperature under dry environmental conditions, equivalent to conditions above 100 °C when water molecules desorb from the surface. However, the sharp difference in tribological performance between silicon nitride on the one hand and alumina and steel on the other hand cannot be understood in this context. Analyzing the friction behavior during the running-in phase, it is evident that only alumina and steel form a stable interface with constant low friction and relatively low wear rates. Silicon nitride forms an unstable interface with fluctuating COF and relatively high wear rates due to its own inherent tendency to tribo-oxidation. KW - Fretting KW - Hard carbon coatings KW - ta-C KW - High temperature KW - Counterbody influence PY - 2009 DO - https://doi.org/10.1016/j.wear.2009.08.041 SN - 0043-1648 VL - 267 IS - 12 SP - 2208 EP - 2215 PB - Elsevier CY - Amsterdam AN - OPUS4-20344 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Hartelt, Manfred A1 - Gräber, H.G. T1 - Experimental study on wear of dental ceramic materials - tests in artificial saliva T2 - 17th International colloquium tribology - Solving friction and wear problems CY - Stuttgart/Ostfildern, Germany DA - 2010-01-19 KW - Fretting KW - Life science KW - Wear KW - Dental materials PY - 2010 SN - 3-924813-80-9 IS - Special aspects of tribology SP - 1 EP - 7 AN - OPUS4-21070 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Wäsche, Rolf T1 - The history of the Stribeck curve and ball bearing steels: The role of Adolf Martens N2 - The historical development on the discoveries of lubrication regimes for lubricated sliding contacts has been reviewed from the very beginning. It was found that the functional relationship between the coefficient of friction and the product of sliding speed and viscosity divided by the normal load well known as the Stribeck curve has been experimentally explored much earlier by Adolf Martens in 1888 long before Richard Stribeck did his pioneering measurements in 1902. However, basic work in this field of experimental hydrodynamics was done and results were published even earlier than that back in 1854 by Gustave A. Hirn, in 1879 by Robert H. Thurston and in 1883 by Beauchamp Tower. KW - Stribeck curve KW - Martens KW - Stribeck KW - Thurston KW - Gümbel KW - Hirn PY - 2010 DO - https://doi.org/10.1016/j.wear.2010.02.015 SN - 0043-1648 VL - 268 IS - 11-12 SP - 1542 EP - 1546 PB - Elsevier CY - Amsterdam AN - OPUS4-21180 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Cruzado, A. A1 - Hartelt, Manfred A1 - Wäsche, Rolf A1 - Urchegui, M.A. A1 - Gómez, X. T1 - Fretting wear of thin steel wires. Part 1: Influence of contact pressure N2 - Different fretting tests of thin steel wires under different conditions (loads, strokes, number of cycles and mean pressures) were performed. The wires used had 0.45 mm in diameter and the material was a cold-drawn eutectoid carbon steel (0.8% C) with a tensile strength over 2800 MPa. The tests were carried out with 90° "crossed cylinders" configuration varying the stroke, normal load and testing time (number of cycles). Afterwards the volumetric wear was obtained using surface profilometry with diamond stylus. With a classical study of the coefficient of wear with respect to the sliding distance, the results show that the wear coefficient increases with normal load and stroke, consequently, for the same sliding distance, the wear produced was higher when the load and/or stroke is increased. In this work, the coefficient of wear is decreasing continuously as the test is running. In order to analyze better the wear behaviour, another method, in which the volumetric wear is compared with respect to the Archard's loading factor, is proposed. As result of this method, two distinctive behaviours were detected; one corresponds to the running-in period with a more aggressive wear behaviour and the second one to the stable steady state period. In all the tests the running-in period was similar with regard to the wear rates but in the stable period the wear rates were increasing with higher loads or strokes. KW - Fretting KW - Wear KW - Wires KW - Contact pressure KW - Unlubricated tests PY - 2010 DO - https://doi.org/10.1016/j.wear.2010.02.017 SN - 0043-1648 VL - 268 IS - 11-12 SP - 1409 EP - 1416 PB - Elsevier CY - Amsterdam AN - OPUS4-21181 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hartelt, Manfred A1 - Wäsche, Rolf A1 - Djahanbakhsh, Mohammad A1 - Österle, Werner T1 - Vergleich von Standard-Modell- und HIP-Simulator-Untersuchungen an Verschleißschutzschichten für Metall-Keramik-Paarungen bei Endoprothesen KW - Beschichtung KW - Reversierender Gleitverschleiß KW - HIP-Simulation KW - Coating KW - Reciprocating sliding KW - HIP-Simulation PY - 2008 SN - 0724-3472 VL - 55 IS - 1 SP - 21 EP - 25 PB - Expert Verlag CY - Renningen AN - OPUS4-17133 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Tribotesting with small loads and amplitudes - how does it compare to normal conditions in oscillating sliding? T2 - 27th Meeting of the International Research Group on Wear of Engineering Materials CY - Berlin, Germany DA - 2008-09-30 PY - 2008 AN - OPUS4-18215 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Tribological behavior of hard carbon coatings sliding against aluminum oxide, silicon nitride and steel up to 250 °C in air T2 - NORDTRIB 2008, 13th Nordic Symposium on Tribology CY - Tampere, Finland DA - 2008-06-10 PY - 2008 AN - OPUS4-18217 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Physikalisch-chemische Grundlagen der Festschmierstoffe T2 - TAE Esslingen: Lehrgang: Reibungs- und Verschleißminderung durch Festschmierstoffe CY - Ostfildern, Germany DA - 2008-03-31 PY - 2008 AN - OPUS4-18316 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Grundlagen der Schwingungsverschleißprüfung T2 - TAE Esslingen + GfT: Seminar: Reibung und Verschleiß von Werkstoffen, Bauteilen und Konstruktion CY - Ostfildern, Germany DA - 2008-04-08 PY - 2008 AN - OPUS4-18317 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Verschleißprüfung als Werkzeug für die keramikbezogene Werkstoffentwicklung T2 - Hannover-Messe 2008: Werkstoff-Forum CY - Hanover, Germany DA - 2008-04-25 PY - 2008 AN - OPUS4-18318 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Djahanbakhsh, Mohammad A1 - Hartelt, Manfred A1 - Wäsche, Rolf T1 - Reasons for inferior performance of ceramic on a-C:H-coated Ti-6Al-4V in hip simulator testing compared to ball on flat reciprocating sliding tests N2 - The tribological performance of a hydrogenated amorphous carbon coating on Ti–6Al–4V against ceramic balls was checked by simple reciprocating sliding tests and by more complicated tests in a hip joint simulator. 3 of 4 joints failed during hip simulator testing already after approximately 100 × 10³ cycles and possibly due to coating failures caused by insufficient polishing of the metallic acetabular cups prior to coating deposition. Since such failures occurred only occasionally, the problem was not revealed by reciprocating sliding tests which are stressing a much smaller surface area compared to the tests in the hip joint simulator. Another type of failure, pits of 1–2 µm in diameter distributed randomly at the coating surface, was frequently observed by Scanning Electron Microscopy and analyzed comprehensively by Focused Ion Beam technique in combination with Transmission Electron Microscopy in one case. Although not necessarily affecting wear, such small failures might cause long-term problems in vivo, by providing access of body fluid to the substrate–coating interface making it susceptible to corrosion. KW - Hip simulator KW - Reciprocating sliding test KW - A-C:H KW - Coating failure KW - Artificial hip joint PY - 2008 DO - https://doi.org/10.1016/j.wear.2008.04.008 SN - 0043-1648 VL - 265 IS - 11-12 SP - 1727 EP - 1733 PB - Elsevier CY - Amsterdam AN - OPUS4-18439 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Tribological characterisation with crossed cylinders - comparison of methods and application examples T2 - TAE Esslingen: 16. International Colloquium Tribology 2008 CY - Ostfildern, Germany DA - 2008-01-15 PY - 2008 AN - OPUS4-18463 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - The interface as key to unclustard ceramic tribology T2 - SRV Workshop und Normungstagung CY - Nagoya, Japan DA - 2008-03-11 PY - 2008 AN - OPUS4-18464 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Influence of deposition parameters on tribological properties of CNx coatings T2 - WOM, 17th International Conference on Wear of Materials CY - Las Vegas, NV, USA DA - 2009-04-19 PY - 2009 AN - OPUS4-19364 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Hartelt, Manfred A1 - Springborn, U. A1 - Bewilogua, K. A1 - Keunecke, M. T1 - Wear of carbon nitride coatings under oscillating sliding conditions N2 - An extended study on tribological properties of carbon nitride coatings under oscillating sliding conditions has been carried out. The coatings were prepared by reactive magnetron sputtering with graphite target using nitrogen as reactive gas in an argon/nitrogen atmosphere during the deposition process to deposit carbon nitride, CNx. Coating thickness was about 2 µm. A 200–300 nm thick Ti interlayer was used to enhance adhesion. The nitrogen flow during the deposition was varied to control the amount of nitrogen in the coating. Maximum amount of N-content was about 28 at%, achieved at a maximum N2 flow rate. Other deposition parameters were target to substrate distance, substrate temperature during deposition and bias voltage. The results show a large variation of hardness depending mainly on the nitrogen content and bias voltage. Higher bias voltage produced harder coatings as did lower nitrogen content. The tribological properties were tested unlubricated and lubricated by paraffin oil under gross slip fretting conditions at room temperature against alumina as counter material. Most coatings, but not all, showed a more or less pronounced dependence of wear on relative humidity with wear rates from 10-5 to 10-6 mm3/Nm. The best coatings with regard to a low wear rate and the least dependence upon relative humidity were carbon nitride coatings deposited at elevated substrate temperatures up to 350 °C. The wear resistance of these coatings was increased under the most severe conditions by about one order of magnitude. The results are discussed on the basis of a transfer layer formation. The results show clearly that wear is not significantly correlated to the coating hardness which itself is strongly dependant on the nitrogen content. However, under lubricated conditions with paraffin oil, wear rates were generally very low with wear coefficients at about 10-8 mm3/Nm. KW - Carbon nitride KW - Wear KW - Fretting KW - Dry sliding KW - Paraffin oil PY - 2010 DO - https://doi.org/10.1016/j.wear.2010.08.010 SN - 0043-1648 VL - 269 IS - 11-12 SP - 816 EP - 825 PB - Elsevier CY - Amsterdam AN - OPUS4-22208 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Yarim, Rasim A1 - Klaffke, Dieter A1 - Hartelt, Manfred ED - Bartz, Wilfried J. T1 - Oscillating Sliding Wear Behaviour of SiC, TiC, TiB2, 59SiC-41TiB2 and 52SiC-24TiC-24TiB2 Materials up to 750°C in Air T2 - 14th International Colloquium Tribology, Tribology and Lubrication Engineering CY - Stuttgart, Deutschland DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - II SP - 1039 EP - 1045 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3057 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klaffke, Dieter A1 - Wäsche, Rolf A1 - Wötting, G. ED - Bartz, Wilfried J. T1 - Tribological Characterisation of a Sl3N4-TiN Composite Ceramic in Fretting Tests at Room Temperature T2 - 14th International Colloquium Tribology, Tribology and Lubrication Engineering CY - Stuttgart, Germany DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - III SP - 1413 EP - 1420 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3058 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klaffke, Dieter A1 - Wäsche, Rolf A1 - Aldinger, F. A1 - Janakiraman, N. ED - Bartz, Wilfried J. T1 - Tribological investigations on siliconcarbonitride ceramics derived from preceramic polymers T2 - 14th International Colloquium Tribology, Tribology and Lubrication Engineering CY - Stuttgart, Deutschland DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - 3 SP - 1403 EP - 1412 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3059 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Oscillating Sliding Wear Behaviour of SiC, TiC, TiB2, 59SiC-41TiB2 and 52SiC-24TiC-24TiB2 Materials up to 750°C in Air T2 - 14th International Colloquium Tribology, Tribology and Lubrication Engineering CY - Ostfildern, Germany DA - 2004-01-13 PY - 2004 AN - OPUS4-3076 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 - CONF A1 - Wäsche, Rolf T1 - Interface formation in SiC based composites T2 - AIST-BAM Symposium on Material Surface Technology in TWIN Institute Programme CY - Tsukuba, Japan DA - 2003-02-18 PY - 2003 AN - OPUS4-4305 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Structure of interface in SiC - based composites formed by tribo-oxidation under dry sliding conditions T2 - International Conference on the Characterization and Control of Interfaces for High Quality Advanced Materials (ICCCI 2003) CY - Kurashiki, Japan DA - 2003-09-24 PY - 2003 AN - OPUS4-4304 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Bestimmung der Thermoshockfestigkeit von Keramik mittels Laseraufzeichung T2 - DKG Bezirksgruppensutzung Berlin CY - Berlin, Germany DA - 2002-04-18 PY - 2002 AN - OPUS4-6303 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Pre- Standardisation for Powders and Green Bodies - VAMAS TWA 27 as a Tool for enhancement of Quality in the Ceramic Manufacturing Process T2 - International Workshop on Trends and Initiatives in Materials Characterisation and Processing CY - Gwangju, South Korea DA - 2002-09-02 PY - 2002 AN - OPUS4-6304 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Tribology of Advanced Ceramics III: Principles of solid lubrication - materials and mechanisms T2 - APEC workshop CY - Daejeon, South Korea DA - 2002-03-04 PY - 2002 AN - OPUS4-6305 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Tribology of Advanced Ceramics I: Mild to severe wear transitions T2 - APEC workshop CY - Daejeon, South Korea DA - 2002-03-04 PY - 2002 AN - OPUS4-6306 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Tribological perfomance of SiC and TiB2 SSilding against SiC and AI2O3 T2 - NORDTRIB 2002 CY - Stockholm, Sweden DA - 2002-06-10 PY - 2002 AN - OPUS4-6307 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Tribology of Advanced Ceramics II: Evaluation of tribological Properties T2 - APEC workshop CY - Daejeon, South Korea DA - 2002-03-04 PY - 2002 AN - OPUS4-6308 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Porous alumina from nano sized powders with improwed diffuse reflection properties T2 - Vorlesung bei Osaka University CY - Osaka, Japan DA - 2002-09-04 PY - 2002 AN - OPUS4-6309 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Promoting the infrastructure - prestandardisation endeavours for ceramic powders and green bodies T2 - Annual Meeting of the American Ceramic Society CY - St. Louis, MO, USA DA - 2002-04-30 PY - 2002 AN - OPUS4-6310 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Tribological Tailoring of Ceramic Composites T2 - 13th International Colloquium on Tribology CY - Esslingen am Neckar, Germany DA - 2002-01-15 PY - 2002 AN - OPUS4-6312 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - High Temperature Tribological Behaviour of SiC Particulate Composites T2 - Austceram 2002 CY - Perth, Australia DA - 2002-09-30 PY - 2002 AN - OPUS4-6313 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Procop, Mathias A1 - Hübner, Wolfgang A1 - Wäsche, Rolf A1 - Nieland, S. A1 - Ehrmann, O. T1 - Fast Elemental Mapping in Materials Science KW - Electron probe microanalysis KW - EPMA KW - Energy dispersive X-ray spectroscopy KW - EDS KW - Elemental mapping PY - 2002 UR - http://www.microscopy-analysis.com/sites/default/files/magazine_pdfs/mag%20179_2002_Jan_Procop_1.pdf SN - 0958-1952 IS - January SP - 5 EP - 6 PB - Rolston Gordon Comm. CY - Bookham, Surrey AN - OPUS4-7091 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klaffke, Dieter A1 - Steinborn, Gabriele A1 - Wäsche, Rolf A1 - Wötting, G. ED - Degischer, H.-P. T1 - Tribologische Untersuchungen an SiC- und Si3N4-basierten Keramiken T2 - 14. Symposium Verbundwerkstoffe und Werkstoffverbunde CY - Wien, Österreich DA - 2003-07-02 PY - 2003 SN - 3-527-30762-1 SP - 545 EP - 550 PB - Wiley-VCH CY - Weinheim AN - OPUS4-2591 LA - deu 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 - Hackley, V.A. A1 - Patton, J. A1 - Lum, L.-S. H. A1 - Wäsche, Rolf A1 - Naito, M. A1 - Abe, H. A1 - Hotta, Y. A1 - Pendse, H. T1 - Analysis of the isoelectric point in moderately concentrated Alumina suspensions using electroacoustic and streaming potential methods PY - 2002 SN - 0193-2691 SN - 1532-2351 VL - 23 IS - 5 SP - 601 EP - 617 PB - Dekker CY - New York, NY AN - OPUS4-2080 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Klaffke, Dieter A1 - Skopp, André ED - Bartz, Wilfried J. T1 - Tribological behaviour of silicon nitride with boron nitride as a solid lubricant PY - 1992 SN - 3-924813-28-0 N1 - Serientitel: Internationales Kolloquium / Technische Akademie Esslingen – Series title: Internationales Kolloquium / Technische Akademie Esslingen IS - 8 SP - 10.2-1 - 10.2-10 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-2406 LA - eng 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 - Rudolph, Pascale A1 - Brzezinka, Klaus-Werner A1 - Wäsche, Rolf A1 - Kautek, Wolfgang T1 - Physical chemistry of the femtosecond and nanosecond laser-material interaction with SiC and a SiC-TiC-TiB2 composite ceramic compound N2 - The interaction of nanosecond laser pulses in the ultraviolet wavelength range and femtosecond laser pulses in the near-infrared region with the semiconductor SiC and the composite compound SiC–TiC–TiB2 was investigated. Surface analytical techniques, such as XPS, depth profile (DP), and micro-Raman spectroscopy (?-RS) were used to identify the chemical changes between untreated and laser-treated areas. Single-pulse irradiation led to material modifications in the condensed state in most instances. Multi-pulse results differed depending on the pulse duration. Crystal structure changes were observed as a consequence of laser-induced melting and resolidification. In air contact all components underwent oxidation reactions according to thermodynamic expectations. Exceptions were observed under exclusion of oxygen, SiC was reduced to elemental Si. KW - Femtosecond techniques KW - Nanosecond techniques KW - Ceramics KW - Raman spectra/condensed matter KW - XPS/surface analysis PY - 2003 DO - https://doi.org/10.1016/S0169-4332(02)01356-9 SN - 0169-4332 SN - 1873-5584 VL - 208-209 SP - 285 EP - 291 PB - North-Holland CY - Amsterdam AN - OPUS4-2791 LA - eng 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 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 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 - Steinborn, Gabriele A1 - Fritz, Ulrich A1 - Rabe, Torsten A1 - Wäsche, Rolf T1 - Dispergierung von Nanopulvern in Foliengießschlickern KW - Dispergierung KW - Nanopulver KW - Folie PY - 2004 SN - 0173-9913 SN - 0196-6219 VL - 18 IS - 1 SP - 43 EP - 50 PB - Göller CY - Baden-Baden AN - OPUS4-5219 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Gas pressure sintering of SiC-TiC-TiB2 ceramic composites T2 - 8. ECerS Conference of the European Ceramic Society CY - Istanbul, Turkey DA - 2003-06-29 PY - 2003 AN - OPUS4-5354 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Laser induced thermal shock testing on Si3N4 GS44 and alumina Heratape T2 - Research and Development on Advanced Materials for Transportation Applications CY - Oakland, CA, USA DA - 2003-10-22 PY - 2003 AN - OPUS4-5361 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Werkstoffe der hochleistungskeramik - Herstellung und Charakterisierung an der BAM T2 - Seminar für Werkstofftechnik im FB 15 der Universität Kassel CY - Kassel, Germany DA - 2003-11-17 PY - 2003 AN - OPUS4-5362 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Dispersion and Characterisation of Nanoscale Particle Suspensions T2 - International Symposium on Smart Processing Technology (ISMPT) CY - Osaka, Japan DA - 2005-11-14 PY - 2005 AN - OPUS4-11828 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 -