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Dry friction and wear rates as under liquid lubrication of ceramic/carbon couples up to 450°C
(2004)
In a high temperature tribometer, stationary carbon has been tested against different rotating ceramics (SiC, Si3N4, Al2O3, WC-6Ni, MgO-ZrO2, (Ti, Mo)(C, N)) and stainless steel (DIN 1.4876). The rotating discs were grinded, polished and/or lapped. For most material combinations, the wear morphology is known from available literature. A transfer film with a typical wear pattern was found on the rotating disc. The combination of antimony graphite EK3245 against MgO-ZrO2 did not form carbonaceous transfer layer. Through advanced variation of the roughness up to Rpk=0.011?µm, the wear rate has been reduced to Kv 3.5×10-8?mm3/N?m at a stable coefficient of friction in a millirange of µ~0.008 for a sliding distance of 20.000?m.