Method of increasing the strength of a beta silicon carbide arti

Details Method of increasing the strength of a beta silicon carbide arti Method of increasing the strength of a beta silicon carbide arti

1978-07-13

1980-03-25

Parrish, John A.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

106 43, 106 44, 264 82, C04B 3556

Patent

active

041950496

ABSTRACT:
A strong beta silicon carbide article is formed from a moldable mixture including beta silicon carbide particles, from about 1/16% by weight to no more than 1/4% by weight of the total weight of the moldable mixture of niobium carbide particles and a binder for supporting these particles for a molding operation. The mixture is molded to form the shape of an article, and the article is pyrolized so that volatile portions of the binder are driven off and the remaining portions broken down to a carbon phase. The carbon phase is transformed to beta silicon carbide in a siliciding operation. The addition of the small percentage of niobium carbide unexpectedly increases the strength of the finished beta silicon carbide article.

REFERENCES:
patent: 3175918 (1965-03-01), McGahan
patent: 3463621 (1969-08-01), Kieffer
patent: 3649310 (1972-03-01), Yates
patent: 3649342 (1972-03-01), Bartlett
patent: 3796564 (1974-03-01), Taylor
patent: 3859399 (1975-01-01), Bailey et al.
patent: 3882210 (1975-05-01), Crossley et al.

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