Patent ID: 7531217

Claim:
A method for making an oxidation resistant article, comprising: (a) providing a superalloy substrate comprising Ni and Al; (b) depositing a layer of a Pt group metal on the superalloy substrate to form a Pt group metallized substrate; (c) depositing on the Pt group metallized substrate by a chemical vapor deposition (CVD) process at least one reactive element selected from the group consisting of Hf, La, Ce, and Zr to form a surface modified region thereon, wherein the surface modified region comprises the Pt-group metal, Ni, Al and the reactive element in relative concentration to provide a γ-Ni+γ′-Ni 3 Al phase constitution, and wherein the surface modified region comprises an average of about 1 wt. % to about 5 wt. % of the reactive element.