Hydrogen permeation/separation thin membrane
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United States of America Patent
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Jan 31, 2012
Grant Date -
Mar 5, 2009
app pub date -
Mar 8, 2007
filing date -
Mar 8, 2006
priority date (Note) -
Expired
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Abstract
A hydrogen permeation/separation thin membrane including a Ni—Ti—Nb alloy. The Ni—Ti—Nb alloy is a cast foil material obtained by roll quenching and a refining heat treatment. The membrane has a thickness of 0.07 mm or less. The Ni—Ti—Nb alloy has the following: (a) a composition consisting of 10 to 47 atomic % of Nb, 20 to 52 atomic % of Ti, and a remainder containing 20 to 48 atomic % of Ni and inevitable impurities; and (b) an alloy structure where fine particles of a Nb-based solid solution alloy, in which Nb forms a solid solution with Ni and Ti in Nb, are dispersed in a basic structure made of a Ni—Ti(Nb) intermetallic compound formed of a solid solution of a Ni—Ti intermetallic compound, in which part of Ti thereof is replaced by Nb.
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