3208 エンジン油中でのダイヤモンドライクカーボン膜の摩擦特性と密着強度(S47 エンジンのトライボロジー)

概要

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Recently improving the fuel efficiency of automobiles becomes more important. Reducing the mechanical loss in engine directly contributes to resolving this issue. This paper presented a study concerning the application of diamond-like carbon (DLC) coatings on the engine components under an engine oil lubricated condition. The DLC film obtained by arc ion plating process (PVD-DLC) was selected because of its lower friction property. The low hydrogen content of the PVD-DLC film was contributed to a more wettable film that reacted with the oiliness agent in engine oil. The effect of thickness and surface roughness of PVD-DLC film were examined with respect to its adhesion to the substrate. Throughout engine tests, no flaking of DLC film has observed, indicating that good film adhesion was obtained, which contributed to a continuous reduction of friction.
2005-09-18