Patent ID: 6485792
Filing Date: 2002-11-26
Classification: C23C,Y02T

Abstract:
A method for applying a substantially stoichiometric NiAl coating to a superalloy turbine component, comprising the steps of:providing a superalloy turbine component comprised of a material selected from the group consisting of a nickel-based superalloy and a cobalt-based superalloy; providing a powder having a preselected size of substantially stoichiometric NiAl and Cr, with minor additions of at least one element selected from the group consisting of rare earth elements and Zr, and combinations thereof; applying the powder to a substrate of the component to provide a coating of preselected thickness using a high velocity oxy-fuel (HVOF) process with hydrogen as a fuel, having a reducing flame; and heat treating the component having the coating applied to the substrate at a preselected temperature of from 1700-2100Â° F. for a preselected time of from about 1-16 hours to achieve a sound metallurgical bond between the substrate and the coating.