酸化鉄-アルミナ複合セラミックスの境界潤滑域での摺動特性に及ぼす潤滑油中のカルシウム化合物の影響

概要

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Calcium sulfonate, a detergent/dispersant component in lubricating oils, greatly increase the friction coefficient of TiO_2 added Fe_2O_3-Al_2O_3 ceramics under boundary lubricating conditions. ESCA studies showed that the average thickness of an organic thin film sticking to the surface of wear tracks was thicker than that away from wear tracks, and the concentrations of Ca, S and P were much higher in the wear track than those off the wear track, suggesting that most of the -SO_3-Ca-OH groups in sulfonate remained unchanged. It is concluded that oil containing rich calcium compounds possibly formed a layer, blocking other oily additives with which the surface would have been wettable. This is assumed to increase the friction coefficient of the TiO_2 added Fe_2O_3-Al_2O_3 ceramics.
社団法人日本セラミックス協会の論文
2007-01-01