TY - GEN A1 - Wäsche, Rolf A1 - Hartelt, Manfred ED - Mang, T. T1 - Fretting N2 - The importance of lubricants in virtually all fields of the engineering industry is reflected by an increasing scientific research of the basic principles. Energy efficiency and material saving are just two core objectives of the employment of high-tech lubricants. The encyclopedia presents a comprehensive overview of the current state of knowledge in the realm of lubrication. All the aspects of fundamental data, underlying concepts and use cases, as well as theoretical research and last but not least terminology are covered in hundreds of essays and definitions, authored by experts in their respective fields, from industry and academic institutes. KW - Fretting corrosion KW - Fretting fatigue KW - Fretting regimes KW - Fretting wear KW - Mixed fretting regime PY - 2014 SN - 978-3-642-22646-5 SN - 978-3-642-22647-2 DO - https://doi.org/10.1007/978-3-642-22647-2 VL - 2 SP - 680 EP - 687 PB - Springer CY - Heidelberg AN - OPUS4-30497 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Woydt, Mathias ED - Mang, T. T1 - Stribeck curve N2 - The importance of lubricants in virtually all fields of the engineering industry is reflected by an increasing scientific research of the basic principles. Energy efficiency and material saving are just two core objectives of the employment of high-tech lubricants. The encyclopedia presents a comprehensive overview of the current state of knowledge in the realm of lubrication. All the aspects of fundamental data, underlying concepts and use cases, as well as theoretical research and last but not least terminology are covered in hundreds of essays and definitions, authored by experts in their respective fields, from industry and academic institutes. PY - 2014 SN - 978-3-642-22646-5 SN - 978-3-642-22647-2 DO - https://doi.org/10.1007%2F978-3-642-22647-2 VL - 4 SP - 1998 EP - 2005 PB - Springer CY - Heidelberg AN - OPUS4-30499 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Steinborn, Gabriele T1 - Wear behaviour of low IR-emission titanate ceramics under gross slip fretting conditions against steel and alpha-alumina N2 - The tribological behavior of different low infrared (IR) emission ceramic materials from the titanate group has been investigated at room temperature under gross slip fretting conditions against 100Cr6 ball bearing steel and α-alumina as the counterface materials. For all material pairs, friction and wear depended largely on the relative humidity of the environment. When paired with steel the low IR-emission ceramic disks showed higher wear resistance. Under dry conditions, almost no wear was found on the low IR-emission ceramic specimen. The high wear on the steel counter body is caused not only by tribo-oxidation, which is the main wear mechanism, but also by abrasion. In dry conditions a COF of 0.6 and in humid conditions a COF of 0.2 have been measured. When paired with α-alumina the results on wear are just opposite to those with steel counterbody and the low IR-emission ceramic materials show much lower wear resistance under all conditions. This is explained by the predominance of abrasion and the relatively large difference in hardness between the low IR-emission ceramic and α-alumina. In high humidity environments the results point to the formation of stable reaction layers causing lower friction and wear. KW - Gross slip fretting KW - Ceramic wear KW - Yttrium titanate KW - Zirconium titanate KW - Low IR-emission ceramics PY - 2014 DO - https://doi.org/10.1016/j.wear.2014.03.006 SN - 0043-1648 VL - 315 IS - 1-2 SP - 11 EP - 16 PB - Elsevier B.V. CY - Amsterdam AN - OPUS4-30504 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Colloidal processing of metal bonded niobium carbide (NbC-Ni) N2 - The manufacturing of NbC with Ni binder with addition of titanium carbide by using a colloidal process for blending the different powders without a milling step were investigated. The the sintering process and formation of the resulting microstructures, the phase relations and the hardness of the produced cermet materials are characterized. T2 - 19. Plansee Seminar CY - Reutte, Austria DA - 29.05.2017 KW - Niobium carbide (NbC) KW - Cermets KW - Hardness PY - 2017 AN - OPUS4-40513 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Woydt, Mathias T1 - Tribological characterization of niobium carbide with different binder materials N2 - Wear of Niobium carbide with nickel binder has been experimentally characterized under dry, oscillating sliding conditions against steel and a-alumina up to 600°C. T2 - National Tribology Conference/NTC-2016 CY - Varanasi, India DA - 08.12.2016 KW - Niobium carbide KW - Wear resistance KW - Binder PY - 2016 SP - 1 EP - 2 AN - OPUS4-38879 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Hartelt, Manfred A1 - Ehrke, Roman ED - Silva Gomes, J. F. ED - Meguid, S. A. T1 - A study on tribological behaviour of a-C:H coatings under lubricated conditions up to 250°C N2 - The influence of temperature and counterbody material on the tribological properties of a-C:H coatings deposited on Cronidur 30 steel has been investigated in a lubricated ball on disk contact situation with alpha-alumina and silicon nitride as counterbodies. The results show, that the wear volumes of the systems increase exponentially with increasing temperature, for alpha-alumina more than for silicon nitride. Two different wear mechanisms seem to have a major influence: First, the abrasive action due to materials hardness and second, the tribo-oxidation when silicon nitride is counter material. T2 - 6th International Conference on Mechanics and Materials Design CY - P. Delgada/Azores, Portugal DA - 26.07.2015 KW - Diamond like carbon KW - Ceramics KW - Wear KW - Friction KW - Temperature PY - 2015 SP - Paper 5395, 445 EP - 446 AN - OPUS4-37014 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Hartelt, Manfred A1 - Ehrke, Roman ED - Silva Gomes, J.F. ED - Meguid, S.A. T1 - A study on tribological behaviour of a-C:H coatings under lubricated conditions up to 250 °C N2 - The influence of temperature and counterbody material on the tribological properties of a-C:H coatings deposited on Cronidur 30 steel has been investigated in a lubricated ball on disk contact situation. The results show, that the wear volumes of the system increase exponentially with increasing temperature. Two different wear mechanisms seem to have a major influence: First, the abrasive action due to materials hardness and second, the tribooxidation when silicon nitride is counter material. T2 - M2D2015 - 6th International conference on mechanics and materials in design CY - Ponta Delgada, Azores DA - 26.07.2015 KW - Diamond like carbon KW - Ceramics KW - Wear KW - Friction KW - Temperature PY - 2015 SN - 978-989-98832-3-9 SP - 445 EP - 446 AN - OPUS4-33808 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - A study of tribological behaviour of a-C:H coatings under lubricated conditions up to 250°C T2 - 6. International Conference on Mechanics and Materials in Design CY - P. Delgada/Azores, Portugal DA - 2015-07-26 PY - 2015 AN - OPUS4-33761 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Harsha, A.P. A1 - Wäsche, Rolf A1 - Hartelt, Manfred T1 - Friction and wear studies of polyetherimide composites under oscillating sliding condition against steel cylinder N2 - Tribological properties of neat polyetherimide (PEI), glass, carbon fiber, and solid lubricants filled PEI composites are presented in this article. The aim of this study was to investigate the friction and wear properties of these composites under dry oscillating sliding condition at room temperature (RT) as well as at elevated temperature (120 °C). The polymer specimens were made to oscillate against steel cylinder as a counterpart. The friction and wear properties of PEI and composites were strongly influenced by the temperature. Incorporation of carbon fiber in the PEI matrix has increased the wear rate at RT, while at elevated temperature this trend was opposite. Abrasive action of carbon fibers has severely damaged the counterpart and resulted in accelerated wear of the composite at RT. Solid lubricants filled (PTFE, MoS2, graphite) along with glass fiber is beneficial in improving the friction and wear performance of the PEI composite at RT, whereas at elevated temperature wear performance was deteriorated. Tribological performance of neat PEI and glass fiber composite was similar with each other at RT. Scanning electron micrographs and optical micrographs of the worn polymer specimens and the steel cylinders was used to study the possible wear mechanisms. The present test results were also compared with data available on the reciprocating wear of PEI and composites in the literature and trends have been reported. PY - 2015 DO - https://doi.org/10.1002/pc.23559 SN - 0272-8397 SN - 1548-0569 VL - 38 IS - 1 SP - 48 EP - 60 PB - Society of Plastics Engineers CY - Manchester, NH AN - OPUS4-34921 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Steinborn, Gabriele A1 - Woydt, Mathias T1 - Colloidal processing of metal bonded niobium carbide N2 - Manufacturing of Niobium carbide cermets with nickel binder and different additions of titanium carbide has been realized by colloidal processing in aqueous environment. T2 - 19. Plansee Seminar CY - Reutte, Austria DA - 29.05.2017 KW - NbC KW - TiC KW - Ni KW - Colloidal processing KW - Gas pressure sintering KW - Hardness PY - 2017 SP - HM 135/1 EP - HM 135/11 AN - OPUS4-40596 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Wear of alpha-Alumina in hot steam up to 300°C N2 - Selfmated alpha-alumina sliding couples habe been investigated under oscillating sliding at 100 N load in different humidity conditions in air as well as in hot steam up to temperatures of 300°C and ambient pressures up to 4 bar. T2 - 7th International Conference on Mechanics and Materials in Design CY - Albufeira, Portugal DA - 11.06.2017 KW - Alpha-alumina KW - Wear KW - Temperature KW - Abrasion PY - 2017 AN - OPUS4-41127 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Ehrke, Roman A1 - Woydt, Mathias T1 - Wear of alpha-alumina in hot steam up to 300°C N2 - Selfmated alpha-alumina sliding couples have been investigated under oscillating sliding at 100 N load in different humidity conditions in air as in hot steam up to temperatures of 300°C and ambient pressures up to 4 bar. T2 - 7th International Conference on Mechanics and Materials in Design CY - Albufeira, Portugal DA - 11.06.2017 KW - Apha-alumina KW - Wear KW - Steam KW - Temperature KW - Abrasion PY - 2017 SN - 978-989-98832-6-0 SP - 265 EP - 266 PB - LusoImpress S.A. CY - Avintes, Portugal AN - OPUS4-41128 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Klaffke, Dieter ED - Christophe Donnet, ED - Erdemir, Ali T1 - Tribology of DLC Films Under Fretting Conditions KW - DLC KW - Oscillation sliding KW - Counterbody KW - Relative humidity KW - Temperature KW - Lubrication PY - 2008 SN - 978-0-387-30264-5 SP - 362 EP - 382 PB - Springer Science + Business Media AN - OPUS4-18571 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kloß, Heinz A1 - Wäsche, Rolf T1 - Analytical approach for wear prediction of metallic and ceramic materials in tribological applications N2 - Wear mechanisms, as adhesion, abrasion, fatigue and tribochemical wear, are complex in their physical and chemical nature. A theoretical description and prediction of wear are in most cases still far from reality. It is, therefore, important to use test rigs before a practical application of a given material combination under tribological loading. On the other hand, model equations can be helpful for wear description, if a single wear mechanism is dominant. Under oscillating and continuous sliding contact conditions, equations for wear calculation are presented to describe running-in and stationary wear behaviour of metals and ceramics. By using shear energy density, real area of contact, flash temperature, activation energy and numerical simulations with the method of movable cellular automata (MCA), wear data were calculated and compared to experimental laboratory results. KW - Wear KW - Surface temperature KW - Activation energy KW - Simulation KW - Movable cellular automata (MCA) PY - 2009 DO - https://doi.org/10.1016/j.wear.2008.04.034 SN - 0043-1648 VL - 266 IS - 3-4 SP - 476 EP - 481 PB - Elsevier CY - Amsterdam AN - OPUS4-18651 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Wear of thin steel wires T2 - Nordtrib 2010 CY - Luleå, Sweden DA - 2010-06-08 PY - 2010 AN - OPUS4-22874 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Wear of SiC-TiC-TiB2 ceramics at high temperatures and sliding speeds in air T2 - Asiatrib 2010 CY - Perth, Australia DA - 2010-12-05 PY - 2010 AN - OPUS4-22875 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Analysis of oxidative processes in SiC-TiC-TiB2 ceramic composites during tribological loading T2 - Tribochemistry 2009 CY - Kyoto, Japan DA - 2009-09-02 PY - 2009 AN - OPUS4-22870 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf T1 - Extended tribological study on carbon nitride coatings under oscillating sliding conditions T2 - World Tribology Congress (WTC) CY - Kyoto, Japan DA - 2009-09-09 PY - 2009 AN - OPUS4-22872 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - 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 -