y'-Ni3Al MATRIX PHASE Ni-BASED ALLOY AND COATING COMPOSITIONS MODIFIED BY REACTIVE ELEMENT CO-ADDITIONS AND Si

摘要

An alloy including about 16 at % to about 23 at % Al; about 3 at % to about 10 at % Cr; up to about 5 at % Si; up to about 0.3 at % of at least two reactive elements selected from Y, Hf, Zr, La, and Ce; and Ni. The alloy has a volume fraction of γ′-Ni₃Al phase greater than about 75%.