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Ceramic Composition Having Low Friction Coefficient at High Operating Temperatures

Abstract: 

A composite of a first metal ion and a ceramic composition in the near surface region of the composition is formed by ion mixing of the first metal with the ceramic composition. The composite has been oxidized at high temperatures thereby resulting in an oxide gradient layer in the surface of the ceramic composition. Alternatively, a second metal ion is ion mixed with the first metal ion in the near surface region of the ceramic composition and then oxidized at high temperatures to form an oxide gradient layer in the surface of the ceramic composition.

Patent Number: 
4,892,849
Date Of Issue: 
01/09/1990
Inventors: 

James Lankford