Method for making metal matrix composites

Details Method for making metal matrix composites Method for making metal matrix composites

1987-02-27

1989-01-10

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75230, 75244, 419 10, 419 13, 419 24, 419 30, 419 32, 419 62, 428549, 428552, B22F 100

Patent

active

047971550

ABSTRACT:
A metal matrix composite is produced by plastically deforming a metal powder, either or after blending the powder with ceramic fibers, and compacting the mixture at elevated temperatures to achieve substantially full density. Imparting strain energy to the metal allows reduction of the compaction temperature to eliminate reaction between the fibers and the metal or degradation of the fibers. Silicon nitride fibers are thermodynamically superior for use in aluminum or titanium metal matrix composites, since silicon nitride fibers are more stable at the temperatures required for full compaction. Secondary phase reactions are avoided.

REFERENCES:
patent: 3976482 (1976-08-01), Larson
patent: 4066449 (1978-01-01), Havel
patent: 4073648 (1978-02-01), Volin et al.

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