Abstract
In order to examine the fundamental boundary friction properties of ceramics, reciprocating friction experiments of oxide ceramics such as zirconium oxide and aluminum oxide were conducted with trialkyl phosphites and other oil additives. When ceramics were slid against ceramics, no additives used in this study reduced friction markedly. Trialkyl phosphites with short carbon chains appreciably increase the friction coefficients compared with base oil. Several kinds of pure metals were slid against oxide ceramics with a trialkyl phosphite which gave the lowest friction in the case of ceramic to ceramic contacts, and the friction coefficients were compared with those of base oil. The trialkyl phosphite reduces the friction of ceramics slid against each metal except for Cu. Reaction products between Cu and phosphorus had adhesive characteristics against oxide ceramics and increased friction.
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