Method for manufacturing silicon carbide bodies

Details Method for manufacturing silicon carbide bodies Method for manufacturing silicon carbide bodies

1978-07-03

1979-05-15

Cooper, Jack

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 63, 264 65, 264101, 106 44, 106 735, 423345, C04B 3570, C04B 3700, C01B 3136

Patent

active

041547870

ABSTRACT:
In accordance with the invention there is provided a method for manufacturing a reaction bonded silicon carbide body by heating, in a vacuum or an inert atmosphere, to at least the melting temperature of elemental silicon, a porous compact consisting essentially of a substantially uniform mixture of silicon carbide grain and finely divided carbon while said compact is in intimate surface-to-surface contact with a mixture of finely divided elemental silicon and a small amount of finely divided, uniformly distributed carbon, such silicon-carbon mixture preferably also being in the form of a compact. Upon such heating, a portion of the elemental silicon in the silicon-carbon mixture reacts with the carbon therein to form a friable, highly porous matrix of silicon carbide which functions to guide the flow of the remaining elemental silicon into the porous silicon carbide-carbon compact where it reacts with the carbon therein to form additional silicon carbide thereby to convert the compact to a reaction bonded silicon carbide body.

REFERENCES:
patent: 3205043 (1965-09-01), Taylor
patent: 3480395 (1969-11-01), McMullen et al.
patent: 3882210 (1975-05-01), Crossley et al.
patent: 3947550 (1976-03-01), Fitchmun
patent: 4117057 (1978-09-01), Yajima et al.

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