Method for the preparation of silicon carbide whiskers

Details Method for the preparation of silicon carbide whiskers Method for the preparation of silicon carbide whiskers

1986-11-17

1991-01-01

Chaudhuri, O.

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423346, 423439, 156DIG112, 561 88, 528 25, 528 33, 556430, C01B 3136

Patent

active

049816667

ABSTRACT:
In place of the conventional silicon source materials used in the prior art method for the preparation of silicon carbide whiskers, the inventive method utilizes a hydrolysis product of a chlorosilane compound R.sub.a SiCl.sub.4-a or a chlorodisilane compound R.sub.b Si.sub.2 Cl.sub.6-b, in which R is a hydrogen atom or a monovalent hydrocarbon group, a is zero to 3 and b is 1 to 5, as the silicon source which is intimately mixed with a powder of carbon and the mixture is heated at 1400.degree. to 1700.degree. C. to give silicon carbide whiskers in a high conversion. Alternatively, the hydrolysis of the chloro(di)silane compound is performed in an aqueous medium in which a powder of carbon is dispersed in advance so that the hydrolysis product as formed is already a mixture with the carbon powder.

REFERENCES:
patent: 2696480 (1954-12-01), Gordon et al.
patent: 4117057 (1978-09-01), Yajima et al.
patent: 4184852 (1980-01-01), Russ
patent: 4310481 (1982-01-01), Baney
patent: 4310651 (1982-01-01), Baney et al.
J. V. Milewski et al., Journal of Materials Science, vol. 20, pp. 1160-1166, (1985).
J. V. Milewski et al., Los Alamos, Nat. Laboratory, LA-9650-MS, (Feb. 1983).

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