Process for applying thermal barrier coatings to metals and...

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

C - Chemistry, Metallurgy

23

F

117/103

C23F 17/00 (2006.01) C23C 2/26 (2006.01) C23C 8/10 (2006.01) C23C 26/00 (2006.01)

Patent

CA 1204348

ABSTRACT OF DISCLOSURE 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 two metals M1 and M2, e.g., cerium (M1) and cobalt (M2), one of which when exposed to an atmosphere containing a low partial pressure of oxygen and at a high temperature forms a stable oxide, the other of which does not form a stable oxide under such conditions. A coating consisting of such a metal alloy or mixture is subjected to such conditions to produce an outer oxide layer of metal M1 and an inner metal layer of M2 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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