Patent ID: 7157151
Filing Date: 2007-01-02
Classification: C23C,F01D,Y10T

Abstract:
1. A coated article comprising: a metallic substrate: a first layer comprising an MCrAl(Y, Hf) alloy, wherein M is selected from the group consisting of: Co. Ni, Fe and mixtures thereof; a second layer comprising a metallic composition different from the MCrAl(Y,Hf) alloy, said metallic composition selected from the group consisting of; a noble metal, a silicon containing composition; a noble metal, silicon, aluminum containing composition; a noble metal, silicon, chromium containing composition; an aluminum, silicon containing composition; an aluminum, silicon, chromium containing composition; a noble metal, silicon, aluminum, chromium containing composition; a noble metal, silicon, aluminum, chromium, manganese containing composition; and mixtures thereof; and a zone disposed proximate to an interface region between the first layer and the second layer, wherein the zone comprises a first subzone having, in weight percent, about 2% to about 18% Al, about 14% to about 36% Cr, and about 50% to about 68% Co; and wherein the zone further comprises a second subzone having, in weight %, about 6% to about 23% Al, about 26% to about 39% Cr; and about 26% to about 67% Co, and wherein the zone further comprises a third subzone having, in weight percent, about 3% to about 24% Al, about 4% to about 37% Cr, about 8% to about 67% Co, up to about 7% Si, and up to about 76% Pt; and wherein the zone further comprises a fourth subzone having, in weight percent, about 14% to about 20% Al, about 2% to about 34% Pt, about 1% to about 5% Si, about 10% to about 23% Cr, and about 25% to about 51% Co.