Compositions comprising nickel-titanium, methods manufacture thereof and articles comprising the same
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United States of America Patent
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Jul 19, 2016
Grant Date -
Jun 20, 2013
app pub date -
Nov 30, 2012
filing date -
Aug 20, 2009
priority date (Note) -
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Abstract
Disclosing herein is a method for manufacturing nickel-titanium compositions. The method includes disposing a powdered composition in a mold; the powdered composition comprising nickel and titanium; the titanium being present in an amount of about 38 to about 42 wt % and the nickel being present in an amount of about 58 to about 62 wt %; sintering the powdered composition to produce a sintered preform; compacting the preform; machining the preform to form an article; heat treating the article; the annealing being conducted at a temperature of about 1650° F. to about 1900° F. at a pressure of about 3 Torr to about 5 Kg−f/cm2 for a time period of about 10 minutes to about 5 hours; and quenching the article.
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