Patent ID: 7527877

Claim:
A material system comprising: a superalloy substrate; a modified platinum group metal coating, the coating further comprising, in atomic percent, about 5-30 a/o Al, about 10-45 a/o Ni, up to about 20 a/o of an element selected from the group consisting of Cr, Co, Ta, W, Re, Ru, Mo, Nb, Ti and combinations thereof, up to about 2 a/o of an element selected from the group consisting of Zr, Hf, Y, rare earth elements and combinations thereof, the balance being a platinum group metal, the balance comprising not less than about 40 a/o and not more than 85 a/o, wherein a platinum group metal consists of at least one element selected from the group consisting of Pt, Rh, Pd and Ir, wherein the total amount of Ni and elements selected from the group consisting of Cr, Co, Ta, W, Re, Ru, Mo, Nb, Ti and combinations thereof comprise no more than 50 a/o of the coating, and wherein the as-deposited coating is a substantially face centered cubic solid solution structure; a diffusion barrier layer, wherein the diffusion barrier is intermediate the substrate and the modified platinum group metal coating; and wherein the diffusion barrier layer is an oxide based coating.