Nickel-base superalloy article with rhenium-containing protective layer, and its preparation
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United States of America Patent
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Oct 14, 2003
Grant Date -
Feb 20, 2003
app pub date -
Oct 3, 2002
filing date -
Apr 24, 2000
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Abstract
A nickel-base superalloy article has a surface protective layer comprising nickel, from about 20 to about 35 weight percent aluminum, and from about 0.5 to about 10 weight percent rhenium. The protective layer, which is preferably an overlay coating of the beta (.beta.) phase NiAl form, is formed by depositing nickel, aluminum, rhenium, and modifying elements onto the substrate surface. A ceramic layer may be deposited overlying the protective layer.
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