Process for applying thermal barrier coatings to metals and resu

Details Process for applying thermal barrier coatings to metals and resu Process for applying thermal barrier coatings to metals and resu

1985-04-04

1987-12-29

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 635, C23C 810

Patent

active

047159022

ABSTRACT:
Process for applying a protective coating to a metal substrate which provides a thermal barrier and a barrier against oxidation of the substrate. The coating material is a mixture of (1) zirconium and/or hafnium and (2) a metal such as nickel which does not form a stable oxide at a high temperature in an atmosphere having a very low concentration of oxygen. The coating is subjected to such conditions to produce an outer oxide layer of metal zirconium and/or hafnium and an inner metal layer of the second metal alloyed with one or more components of the substrate. The oxide layer provides thermal and oxidation protection and the inner layer bonds the coating to the substrate.

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