Synthesis of alloys with controlled phase structure

Patent · Tue Apr 20 00:00:00 EDT 1999

OSTI ID:872255

Guthrie, Stephen Everett ^[1]; Thomas, George John ^[1]; Bauer, Walter ^[1]; Yang, Nancy Yuan Chi ^[2]

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1. Livermore, CA
2. Lafayette, CA

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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• Assignee: Sandia Corporation (Livermore, CA)
• Patent Number(s): US 5895518
• Application Number: 08/636,369
• OSTI ID: 872255
• Country of Publication: United States
• Language: English

Related Subjects

synthesis
alloys
controlled
phase
structure
method
preparing
useful
engineering
hydrogen
storage
applications
novel
avoids
melting
constituents
employing
vapor
transport
atmosphere
active
metal
constituent
pressure
temperatures
apprxeq
300
subsequent
condensation
reaction
substrate
alloy
forming
preferably
single
preferred
material
powder
diffusion
magnesium
therewith
completed
reasonable
time
avoiding
undesirable
effects
sintering
local
compositional
inhomogeneities
segregation
formation
unwanted
phases
intermetallic
compounds
controlled phase
active metal
substrate material
vapor pressure
intermetallic compound
hydrogen storage
single phase
metal powder
novel method
hydrogen atmosphere
storage applications
phase alloy
metal constituent
vapor transport
intermetallic compounds
alloys useful
phase alloys
phase structure
metallic compound
controlled ph
/75/148/420/