Patent ID: 6066405
Filing Date: 2000-05-23
Classification: C22C,C23C,F01D,F05D,Y02T,Y10T

Abstract:
An article having a platinum-aluminide surface region, comprising:a substrate having a nickel-base superalloy substrate bulk composition and a substrate surface; anda surface region at the substrate surface and extending from the substrate surface into the substrate to a distance defined by an upper limit of integration that is the distance where a weight percent of aluminum has decreased to 18 percent from a higher value closer to the surface, the surface region having an integrated aluminum content of from about 18 to about 24 percent by weight and an integrated platinum content of from about 18 to about 45 percent by weight, balance components of the substrate bulk composition, wherein the sum of the integrated aluminum content, the integrated platinum content, and the components of the substrate bulk composition in the surface region total 100 percent by weight, and wherein the platinum and aluminum contents are relatively high adjacent to the substrate surface and decrease with increasing distance from the substrate surface; anda ceramic layer overlying the surface region.