Ductility microalloyed NiAl intermetallic compounds

This patent describes a NiAl intermetallic alloy. It comprises in atomic percent, at least about 50% nickel, about 0.01% to about 0.25% yttrium, about 0 to about 0.15% gallium and about 0.05% to about 4% of an element selected from the group consisting of chromium and molybdenum and combinations of chromium and molybdenum, and balance from about 40% to about 49.85% aluminum and trace impurities. This paper also comprises a reinforced intermetallic matrix composite article, comprising fiber within a NiAl intermetallic alloy matrix, the intermetallic matrix consisting essentially of, in atomic percent, about 0.01% to about 0.25% yttrium, about 0 to about 0.15% gallium, about 0.05% to about 4% chromium, at least about 50% nickel and the balance essentially aluminum