Superplastic silicon carbide sintered body

Details Superplastic silicon carbide sintered body Superplastic silicon carbide sintered body

1995-10-04

1997-01-07

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 89, C04B 35569

Patent

active

055916856

ABSTRACT:
A superplastic silicon carbide sintered body which comprises at least 85 wt % and at most 98 wt % of silicon carbide grains and more than 2 wt % and less than 15 wt % of a grain boundary phase and which has a relative density of at least 95%, wherein the silicon carbide grains have an average grain size of at most 0.3 .mu.m, the amount of grains having grain sizes exceeding 0.5 .mu.m is at most 3 wt %, and the deformation rate of the sintered body is at least 10.sup.-4 /sec under a compression or tensile stress of from 50 to 2,000 kg/cm.sup.2 within a temperature range of from 1,600.degree. to 1,800.degree. C.

REFERENCES:
patent: 4502983 (1985-03-01), Omori et al.
patent: 4829027 (1989-05-01), Cutler et al.
patent: 4876226 (1989-10-01), Fuentes
patent: 5236875 (1993-08-01), Trigg et al.
patent: 5281564 (1994-01-01), Matsumoto
patent: 5298470 (1994-03-01), Chia et al.

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