Composite materials containing refractory metallic carbides and

Details Composite materials containing refractory metallic carbides and Composite materials containing refractory metallic carbides and

1977-05-23

1979-03-27

Lazarus, Richard B.

Metal founding

Process

Shaping liquid metal against a forming surface

164100, 75123CB, 75123K, 75240, B22D 1902

Patent

active

041460804

ABSTRACT:
Composites consisting of refractory metallic carbide particles in a local matrix of an alloy having a lower melting point than the carbides are prepared by placing sections of refractory metallic carbide, at least some of which are larger in size than those desired in the final composite, in a mold. Matrixing alloy is heated above the melting temperature of the binder metal employed in the sintered carbide and then poured into the relatively cold mold. The binder metal dissolves at least at the outer surfaces of the sections and diffuses into the alloy which is allowed to naturally cool and solidify. The final composite contains micron size particles of the carbides released from the large sections when the binder melts.

REFERENCES:
patent: 3149411 (1964-09-01), Smiley et al.
patent: 3175260 (1965-03-01), Bridwell et al.
patent: 3258817 (1966-07-01), Smiley
patent: 3941181 (1976-03-01), Stoddy
patent: 4024902 (1977-05-01), Baum

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