Graphite-loaded silicon carbide
AssigneeAlumina Ceramics Co. (ACI)
InventorsLloyd G. Talbert, Steven M. Brazil
Life of this patent
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Abstract
A silicon carbide ceramic body having a high degree of lubricity as a result of large graphite inclusions in the body. The graphite inclusions have an average size of at least about 100 micrometers. The graphite-loaded silicon carbide component is preferably formed by spray drying graphite particles independent of the silicon carbide, blending the graphite agglomerates and silicon carbide to form a raw batch, forming the raw batch into a green body, and sintering the green body to produce a graphite-loaded silicon carbide ceramic body having good density and good strength.
Claims14
A raw batch for producing a sintered ceramic body, comprising:
- (a) at least about 5 parts by weight graphite agglomerates, wherein at least about 50 percent of said graphite agglomerates have a size of at least about 100 micrometers;
- and
- (b) at least about 80 parts by weight silicon carbide.
A green body useful for producing a sintered ceramic body, comprising:
- (a) at least about 5 parts by weight graphite agglomerates having an average size of at least about 100 micrometers;
- and
- (b) at least about 80 parts by weight silicon carbide.
Dependencies are inferred from the claim text.