Patent ID: 7662484
Filing Date: 2010-02-16
Classification: C23C,Y10T

Abstract:
1. A metallic article comprising a metallic substrate including a protective layer adapted to provide protection against at least one of oxidation or corrosion at a substrate surface of said substrate, wherein: said substrate has a nickel-based substrate composition comprising nickel or a nickel alloy and further comprising a content of aluminum representing greater than 4.5 weight percent of said substrate composition; said protective layer is a surface region in said substrate, extending into said substrate from said substrate surface, as formed by diffusion of at least platinum into said substrate surface; and said surface region has a content of said platinum such that an integrated proportion of said platinum over an integration depth range is from 5 to 30 weight percent of an overall composition of said integration depth range, which extends from a minimum integration depth to a maximum integration depth, wherein said minimum integration depth is from 0 to 5 μm into said substrate from said substrate surface, and wherein said maximum integration depth is a depth, into said substrate from said substrate surface, at which a local content percentage of said platinum has diminished to 5 weight percent.