Extreme‐pressure behaviour of lubricated ceramic/steel couples

Abstract

The friction and wear behaviour of lubricated ceramic/steel couples was studied, for increasing loads, with a four‐ball tester. For the steel spheres of ceramic/steel couples, a transition point to severe wear was observed, which occurred at loads four to five times higher than the transition for the corresponding steel/steel couple. The extreme‐pressure behaviour for conditions of lubrication with pure hexadecane is compared with the results for lubrication with solutions containing zinc di‐n‐butyl dithiophosphate or zinc di‐sec‐butyl dithiophosphate.

Preventing Catastrophic Camshaft Lobe Failures in Low Emission Diesel Engines

“…(SeeFigures 55 and 56.) Other researchers have demonstrated the benefits of ceramics in valve-train systems or fuel pump applications[21][22][23][24]. This silicon nitride steel pin configuration is significantly more expensive than the bronze pin.…”