Patent ID: 11859287
Assignee: HONEYWELL INTERNATIONAL INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  F  Y | IPC C  F

Claim 6:
7. A method of applying a protective coating to a substrate comprising the steps of:
providing a turbine engine component substrate formed of a ceramic matrix composite material;
forming an environmental barrier coating layer comprising a rare earth disilicate material directly on the substrate;
treating an outer surface of the environmental barrier coating layer to decompose or convert the rare earth disilicate in the outer surface of the environmental barrier coating layer to form a thermal barrier coating layer comprising a porous rare earth monosilicate material directly on the environmental barrier coating layer with a chemical transition between the environmental barrier coating layer and the thermal barrier coating layer, wherein the thermal barrier coating has a thickness of between 5 and 25 microns; and
infiltrating at least a portion of the pores of the thermal barrier coating layer with a metal solution or suspension.