Patent ID: 7407903

Claim:
A material for use at temperatures exceeding 1200° and in an oxidizing atmosphere, the material comprising an alloy having a composition M Z Al Y X W , wherein M is two different alloying metals comprising Ti+M′, where M′ is one of Cr and Nb, wherein X is carbon and/or nitrogen, wherein z is in the range of from 1.8 to 2.2, y is in the range of from 0.8 to 1.2, and w is in the range of from 0.8 to 1.2, wherein a protective layer of Al 2 O 3 is formed after heating to temperatures exceeding 1200° C., and wherein the alloy includes one or more of Ti 3 AlC 2 , TiC and titanium aluminide as a secondary phase in an amount of from greater than zero to about 10 vol -%.