Process for synthesizing compounds from elemental powders and pr

Details Process for synthesizing compounds from elemental powders and pr Process for synthesizing compounds from elemental powders and pr

1990-10-26

1993-12-14

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

419 23, 419 38, 419 39, 419 45, 419 49, 419 57, 419 60, B22F 900

Patent

active

052698300

ABSTRACT:
A process for synthesizing intermetallic compounds from elemental powders. The elemental powders are initially combined in a ratio which approximates the stoichiometric composition of the intermetallic compound. The mixed powders are then formed into a compact which is heat treated at a controlled rate of heating such that an exothermic reaction between the elements is initiated. The heat treatment may be performed under controlled conditions ranging from a vacuum (pressureless sintering) to compression (hot pressing) to produce a desired densification of the intermetallic compound. In a preferred form of the invention, elemental powders of Fe and Al are combined to form aluminide compounds of Fe.sub.3 Al and FeAl.

REFERENCES:
patent: 4762558 (1988-08-01), German et al.
patent: 5015440 (1991-05-01), Bowden

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