Bearing material of silicon carbide

Details Bearing material of silicon carbide Bearing material of silicon carbide

1997-10-29

1999-08-17

Evans, Elizabeth

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428367, 428401, 428698, 501 84, 501 88, 501 89, 501 90, 501 92, B32B 516

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059391855

ABSTRACT:
A bearing material of silicon carbide particularly useful for application in the hot water field is provided having improved corrosion resistance under increased thermal stresses wherein the bearing material is characterized by a predominantly course-grained silicon carbide matrix of pressureless sintered silicon carbide having a biamodal grain sized distribution wherein the biomodal grain size distribution is formed by from 50 to 90% by volume of prismatic, tabular, silicon carbide crystallites having a length of from 100 to 1500 .mu.m and from 10 to 50% by volume of prismatic tabular silicon carbide crystallites having a length of from 5 to <100 .mu.m.

REFERENCES:
patent: 4230497 (1980-10-01), Schwetz et al.
patent: 5545597 (1996-08-01), Yeckley
patent: 5776600 (1998-07-01), Katayama et al.
Proc. 10th Int. Pumps Users Symposium, pp. 63-69.
U.S. application No. 08/544,308, Mossner et al., filed Oct. 17, 1995.
U.S. application No. 08/437,026, Schwetz et al., filed May 8, 1995.

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