Dry friction and wear rates as under liquid lubrication of ceramic/carbon couples up to 450°C

Abstract

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 R_pk=0.011 μm, the wear rate has been reduced to K_v ≈ 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.

Citation

Kleemann, J. and Woydt, M. (2004), "Dry friction and wear rates as under liquid lubrication of ceramic/carbon couples up to 450°C", Industrial Lubrication and Tribology, Vol. 56 No. 1, pp. 38-51. https://doi.org/10.1108/00368790410515371