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Synthesis of alloys with controlled phase structure

United States Patent

5,895,518
April 20, 1999
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
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.
Guthrie; Stephen Everett (Livermore, CA), Thomas; George John (Livermore, CA), Bauer; Walter (Livermore, CA), Yang; Nancy Yuan Chi (Lafayette, CA)
Sandia Corporation (Livermore, CA)
08/ 636,369
April 23, 1996
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under contract no. DE - AC04 - 94AL85000 awarded by the U.S. Department of Energy to Sandia Corporation. The Government has certain rights in the invention.