High strength Si.sub.3 N.sub.4 composite containing SiC whiskers

Details High strength Si.sub.3 N.sub.4 composite containing SiC whiskers High strength Si.sub.3 N.sub.4 composite containing SiC whiskers

1989-11-21

1992-03-03

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 65, 501 92, C04B 1432, C04B 1438

Patent

active

050930567

ABSTRACT:
A high strength Si.sub.3 N.sub.4 composite composed of a sintered body consisting mainly of Si.sub.3 N.sub.4 in which SiC whiskers with a small aspect ratio, preferably an average aspect ratio of 15 to 100, is contained in the sintered body and thereby a considerable improvements can be obtained in the mechanical properties, such as strength, toughness and mechanical shock resistance. The composite is produced by mixing the SiC whiskers with Si.sub.3 N.sub.4 powder and then sintering the resulting mixture by a hot isostatic pressing without using a sintering aid.

REFERENCES:
patent: 3833389 (1974-09-01), Komeya et al.

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