Method of producing shaped silicon-carbide bodies

Details Method of producing shaped silicon-carbide bodies Method of producing shaped silicon-carbide bodies

1979-12-03

1981-05-05

Cooper, Jack

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

106 44, 264 66, 264131, 423345, C01B 3136

Patent

active

042658438

ABSTRACT:
In the production of shaped silicon-carbide bodies, especially tubes which onsist predominantly of silicon carbide throughout their thickness for use in nuclear-reactor technology, a carbon-containing preform (body of the desired shape) is contacted with elemental silicon powder at a temperature of 1400.degree. C. to 1500.degree. C. and the silicon-contacted carbon-containing body is thereafter treated at a temperature of 1800.degree. C. to 2000.degree. C. to transform at least the major part of the carbon into silicon carbide.

REFERENCES:
patent: 2431326 (1947-11-01), Heyroth
patent: 3079273 (1963-02-01), Johnson
patent: 3459504 (1969-08-01), Bracken et al.
patent: 3951587 (1976-04-01), Alliegro et al.
patent: 4141948 (1979-02-01), Laskow
patent: 4154787 (1979-05-01), Brown
patent: 4166841 (1979-09-01), Noakes et al.
Popper et al., "Powder Metallurgy", 1961, No. 8 pp. 113-127.

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