Synthesis of alloys with controlled phase structure

Details Synthesis of alloys with controlled phase structure Synthesis of alloys with controlled phase structure

1996-04-23

1999-04-20

Davis, Robert

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

420900, 420407, 420402, 148420, 148666, 148667, 148513, 75352, 75343, 75357, 75360, B22F 100, C22C 100

Patent

active

058955186

ABSTRACT:
A method for preparing controlled phase alloys useful for engineering and hydrogen storage applications. This novel method avoids melting the constituents by employing vapor transport, in a hydrogen atmosphere, of an active metal constituent, having a high vapor pressure at temperatures .apprxeq.300 C. and its subsequent condensation on and reaction with the other constituent (substrate) of an alloy thereby forming a controlled phase alloy and preferably a single phase alloy. It is preferred that the substrate material be a metal powder such that diffusion of the active metal constituent, preferably magnesium, and reaction therewith can be completed within a reasonable time and at temperatures .apprxeq.300 C. thereby avoiding undesirable effects such as sintering, local compositional inhomogeneities, segregation, and formation of unwanted second phases such as intermetallic compounds.

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Sandrock, G. NATO ASI series, Kluwer Publishing, The Netherlands (in press) "Applications of Hybrides" pp. 1-28, no date available.

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