Metal matrix composite powders and process for producing same

Details Metal matrix composite powders and process for producing same Metal matrix composite powders and process for producing same

1986-05-15

1987-08-18

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BA, 75251, B22F 100

Patent

active

046875115

ABSTRACT:
A composite powdered material is disclosed consisting essentially of particles having a metal matrix and one or more relatively uniform discrete dispersed reinforcement phases in the matrix, the reinforcement phases being of high strength or high hardness compounds selected from intermetallic compounds and metal compounds selected from the group consisting of metal borides, carbides, nitrides, oxides, carbonitrides, and mixtures thereof. The composite powdered particles are spheres of from about 25 to about 200 micrometers and the reinforcement phases have particles of a maximum size of less than about 10 micrometers. A process for producing this composite powder is disclosed which involves entraining in a carrier gas a plurality of powders wherein at least one of the powders supplies the metal from which the matrix is to be formed, and wherein at least two of the powders supply the constituents from which the reinforcement phases are to be formed. The powders are then fed through a high temperature zone to cause essentially complete melting and coalescence of the powders and to cause at least part of the constituents to combine to form at least one of the reinforcement phases, followed by resolidification.

REFERENCES:
patent: 3738824 (1973-06-01), Davis
patent: 3821018 (1974-06-01), Grant
patent: 4251599 (1981-02-01), McCormick
patent: 4356029 (1982-10-01), Down

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