| 摘要 |
PURPOSE: To prevent seizure by interposing an oxide, containing two or more kinds of metal elements selected so that a difference between HLI values of combined metal element oxides is a specific value or more, as a lubricant in a friction surface of a sliding part, so as to generate sliding under a low stable friction coefficient from an ordinary temperature to a high temperature. CONSTITUTION: An oxide, containing two or more kinds of metal elements selected so that a difference between HLI values defined as follows of a combined metal element oxide is 1.3 or more, is interposed as a lubricant in a friction surface of a sliding part. In the case of metal element oxide HLI value-γ8 >1.1648Å, in the case of HLI=I/(γ8 +1.26)<2> -γ8 <1.1648Åfurtherγ6 >0.7196Å, in the case of HLI=I/(γ6 +1.26)<2> -γ6 <0.7196Åfurtherγ4 >0.4550Å, in the case of HLI=I/(γ4 +1.26)<2> -γ4 <0.4550Åfurtherγ3 >0.3570Å, HLI=I/(γ3 +1.26)<2> -I shows a metal ion number,γshows metal ion radius, subscript ofγshows metal ion acid order number and 1.26 shows oxygen ion radius.
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