CPC C22C 30/00 (2013.01) [C22F 1/10 (2013.01); F01D 5/28 (2013.01); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); F05D 2220/32 (2013.01); F05D 2300/175 (2013.01)] | 31 Claims |
1. A composition of matter, comprising:
an alloy of Co, Ni, Al, Ta, and Cr, wherein:
the alloy comprises a solid solution of gamma and gamma prime alloy phases,
the Ni content is at least 25% at. %,
the Al content is at least 10 at. %,
the Cr content is at least 2 at. %,
the Ni:Co ratio is between 0.5 and 1.5, and
further comprising:
a W content in a range of 0 to 2 at. %, and
the Ta content in a range of 2.5-5 at. %, wherein:
the alloy is able to generate a protective aluminum oxide layer upon exposure to air, and
the alloy is characterized by having a γ′ solvus greater than 1100° C. and a solidus of 1343° C. or less.
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