Patent ID: 7083827
Filing Date: 2006-08-01
Classification: C22C,C23C,F01D,F05D,Y02T,Y10T

Abstract:
1. A method for preparing an article having a platinum-aluminide surface region, comprising the steps of: providing a substrate having a nickel-base superalloy substrate bulk composition and a substrate surface, thereafter; depositing a layer of platinum about 0.0003 inches thick upon the substrate surface, thereafter; heating the substrate and layer of platinum to a temperature of about 1800–2000° F. for a time of about 2 hours, thereafter, providing a source of aluminium in contact with the substrate surface, the source of aluminum having an activity of about 40 to about 50 atomic percent as measured in a pure nickel foil; and simultaneously heating the substrate surface and the source of aluminum to a temperature of about 1925–2050° F. for a time of from about 4 to about 16 hours to form a substantially single phase surface region.