TY - JOUR A1 - Harsha, A. P. A1 - Wäsche, Rolf T1 - Influence of temperature on friction and wear characteristic of polyaryletherketones and their composites under reciprocating sliding condition N2 - In the present work it was shown the tribological behavior of different polyaryletherketones (PAEKs) and their composites under reciprocating sliding conditions at room temperature as well as at elevated temperature (120°C). KW - Composite KW - PAEKs KW - Reciprocating sliding KW - Solid lubricants KW - Wear mechanisms PY - 2018 DO - https://doi.org/10.1007/s11665-018-3633-y SN - 1059-9495 VL - 27 IS - 10 SP - 5438 EP - 5449 PB - Springer AN - OPUS4-46430 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 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 - 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 A1 - Steinborn, Gabriele A1 - Woydt, Mathias T1 - Colloidal processing of Nbc cermets with Ni binder N2 - Niobium-titanium carbide cermets with nickel binder have been prepared by colloidal processing in water without a milling step by using Poly-diallyl-dimethyl-ammonium chloride (Poly-DADMAC) as a dispersant. Homogeneous microstructures with relative densities larger than 99% of the theoretical density have been achieved by gas pressure sintering in argon atmosphere. However, mechanical properties like hardness and strength were slightly decreased due to precipitation of free carbon. T2 - ISNT2017 & ISSNOX5 - 9th International Symposium on Nitrides & 5th International Symposium on SiAlONS and Non-Oxides CY - Sapporo, Japan DA - 27.08.2017 KW - Niobium carbide KW - Colloidal processing KW - Nckel binder KW - Hardness PY - 2017 AN - OPUS4-42152 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Sato, K. A1 - Brandt, Guido A1 - Schmid, Thomas A1 - Sasaki, S. A1 - Woydt, Mathias T1 - Wear behaviour of MgO stabilized zirconia in hot steam environment up to 400°C N2 - Self-mated magnesia stabilized zirconia (Mg-PSZ) ceramic sliding couples have been investigated at 100 N load (P0max= 1324 MPa) in oscillating sliding conditions in different humidity conditions in air and in hot steam. Temperatures have been varied up to 400 °C and pressures up to 6 bars. The results show that the wear behavior of MgO-ZrO2 under high Hertzian contact pressures is strongly dependent on temperature and is similar for both dry oscillating and oscillating in hot steam. However, although the evolution in wear rates on temperature is similar and the wear rates of MgO-ZrO2 plunged above 300 °C in hot steam and air by nearly three orders of magnitude, SEM micrographs revealed in hot steam at 400 °C smooth wear tracks. In contrast, hot steam enhanced the tribochemistry of self-mated alumina couples and reduced wear rates. Hot steam decreased the coefficients of friction of MgO-ZrO2 with increasing temperature, but not the wear rates. KW - Hot steam KW - Zirconia KW - Friction KW - Wear KW - Tribofilm KW - Raman spectroscopy PY - 2019 DO - https://doi.org/10.1016/j.wear.2019.01.047 VL - 426-427 SP - 428 EP - 432 PB - Elsevier B.V. AN - OPUS4-47873 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Harsha, A. P. A1 - Wäsche, Rolf A1 - Joyce, T. J. T1 - Friction and wear of two polyethylenes under different tribological contact conditions N2 - Tribological properties of ultrahigh-molecular weight polyethylene (UHMWPE) and cross-linked polyethylene (XLPE) were studied in two different wear modes. Firstly, reciprocating sliding wear studies under non-conformal contact investigated the effects of counterface surface roughness (polished, lapped and ground) of Ti6Al4V on the friction and wear of the polyethylenes. Secondly, two-body abrasive wear studies in conformal contact against different abrasive grit size papers were also carried out to ascertain the wear sensitivity of the polyethylenes under these adverse conditions. Wear mechanisms were studied using optical and scanning electron micrographs. The results of the reciprocating sliding wear studies showed that surface roughness of the counterface influenced friction and wear characteristics although no correlation was found between the coefficient of friction and specific wear rate. XLPE demonstrated wear sensitivity, particularly under severe abrasive wear condition. The results indicated that the performance of the polyethylenes greatly depends upon the tribological system under which it is operating. KW - Abrasive wear KW - Polyethylene KW - Reciprocating sliding wear KW - Surface roughness KW - Wear mechanism PY - 2021 DO - https://doi.org/10.1177/0967391120920130 SN - 0967-3911 SN - 1478-2391 VL - 29 IS - 5 SP - 393 EP - 404 PB - Sage Publishing CY - London AN - OPUS4-56903 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Salge, T. A1 - Wäsche, Rolf A1 - Hodoroaba, Vasile-Dan T1 - Advanced light element and low energy X-ray analysis of a TiB2 – TiC – SiC ceramic material using EDS spectrum imaging N2 - The accurate EDS microanalysis of light elements such as boron and carbon by spectrum imaging will be demonstrated using a sintered hard ceramic material composed of the three major phases titanium boride (TiB2), titanium carbide (TiC), silicon carbide (SiC) and minor phases, sub-μm in size. The combination of these three materials leads to improved mechanical and tribological properties. Silicon carbide is a material used for mechanical seals. It has the disadvantage of reduced failsafe running functions, causing increased wear when running dry. The added titanium components (TiC and TiB2) improve the failsafe running functions. This technology has already been transferred to industrial applications. KW - EDS KW - Spectrum imaging KW - Ceramic KW - Phase analysis KW - Light elements PY - 2018 UR - https://www.bruker.com/fileadmin/user_upload/8-PDF-Docs/X-rayDiffraction_ElementalAnalysis/Microanalysis_EBSD/LabReports/App_eds_10_LE_keramik_Rev1_1_lores.pdf SP - 1 EP - 5 CY - Berlin AN - OPUS4-44622 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Ehrke, R. A1 - Kramer, R. A1 - Jayachandran, A. R. A1 - Brandt, G. T1 - Influence of temperature on tribological behaviour of DLC coatings under lubricated conditions up to 250°C N2 - In the present work it was shown that there is an influence of temperature and counter body material on the tribological properties of a-C:H coatings deposited on Cronidur 30 steel in a lubricated ball on disk contact situation. T2 - ASIATRIB 2018 CY - Kuching, Sarawak, Malaysia DA - 17.09.2018 KW - DLC KW - Temperature KW - Lubricated sliding PY - 2018 SP - 253 EP - 254 AN - OPUS4-46213 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -