Method of producing silicon carbide fibers

Details Method of producing silicon carbide fibers Method of producing silicon carbide fibers

1979-06-12

1981-08-11

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

264 22, 264 65, C01B 3136

Patent

active

042833760

ABSTRACT:
A process for producing polycarbosilane partly containing siloxane bonds, which comprises adding 0.01 to 15% by weight of polyborosiloxane having phenyl groups in at least a part of the side chains of Si with its skeletal structure being composed of B, Si and O to a polysilane having the structure ##STR1## wherein n is at least 3, and R.sub.1 and R.sub.2, independently from each other, represent methyl, ethyl, phenyl or hydrogen; and heating the polymer mixture in an atmosphere inert to the reaction thereby to polymerize it. The polycarbosilane is converted into silicon carbide fibers by first preparing a spinning dope; subjecting the dope to a treatment of rendering it infusible under tension or under no tension and firing the treated dope in a vacuum or in an inert atmosphere.

REFERENCES:
patent: 4100233 (1978-07-01), Yajima et al.
patent: 4117565 (1978-10-01), Asada et al.
Yajima et al II, "J. of Amer. Cer. Soc.", vol. 59, No. 7-8, 1976, pp. 3247.

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