High temperature sliding element and method for preventing high temperature sliding wear
AssigneeKabushiki Kaisha Toyoto Chuo Kenkyusho
InventorsYoshio Shimura, Yoshiyuki Mizutani, Akio Isogai
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Abstract
A high temperature sliding element is provided with a metallic film formed of any one of metals Ni, Mn, Cr, Fe and Co, and alloys of these metals on a sliding surface of a substrate of carbide ceramics or nitride ceramics in accordance with physical vapor deposition. When the substrate and a sliding counterpart ceramic member are slid in a high temperature atmosphere 500.degree. C. or higher with the metallic film intervening therebetween, wear due to sliding motion between the substrate and the counterpart ceramic member can effectively be reduced. The metallic film forms an oxidized sliding surface layer at the high temperature.
Claims6
A high temperature sliding element comprising
- a carbide or nitride ceramic substrate member,
- a metallic film of about 0.1 to 5 .mu.m in thickness formed on said substrate member by physical vapor deposition, said metallic film being formed of at least one selected from the group consisting of nickel, manganese, chromium, and alloys thereof, and
- a sliding surface layer to be slid against a counterpart ceramic member, said sliding surface layer being in the surface of said metallic film,
- thereby preventing sliding wear of said sliding element when slid against said counterpart ceramic member at a temperature of 500.degree. C. or higher in an oxygen containing atmosphere to provide an oxidized sliding surface layer of said metallic film.
A high temperature sliding element comprising
- a carbide or nitride ceramic substrate member,
- a metallic film of about 0.1 to 5 .mu.m in thickness formed on said substrate member by physical vapor deposition, said metallic film being formed of at least one selected from the group consisting of nickel, manganese, chromium, iron, cobalt and alloys thereof, and
- a sliding surface layer to be slid against a counterpart ceramic member, said sliding surface layer being in the surface of said metallic film,
- thereby preventing sliding wear of said sliding element when slid against said counterpart ceramic member at a temperature of 500.degree. C. or higher in an oxygen containing atmosphere to provide an oxidized sliding surface layer of said metallic film.
Dependencies are inferred from the claim text.