Patent ID: 7247393
Filing Date: 2007-07-24
Classification: C23C,Y02T,Y10T

Abstract:
1. A coating system on a substrate, the coating system comprising a coating consisting essentially of gamma prime-Ni 3 Al intermetallic phase and either beta-NiAl intermetallic phase or gamma-Ni phase, the coating having an average aluminum content of 14 to 30 atomic percent and an average platinum-group metal content of at least 1 to less than 10 atomic percent, the balance of the coating being nickel, one or more of chromium, silicon, tantalum, and cobalt, optionally one or more of hafnium, yttrium, zirconium, lanthanum, and cerium, and incidental impurities, wherein the coating has an outer surface region with a platinum-group metal content of less than the average platinum-group metal content in the coating.