Patent ID: 11866380
Assignee: RTX CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  F  Y | IPC C

Claim 0:
1. A method of fabricating a coating, the method comprising:
providing a ceramic matrix composite that includes SiC fibers disposed in a SiC matrix;
depositing a base slurry on the ceramic matrix composite, wherein the base slurry contains powders of
a metal oxide,
at least one of silicon carbide, silicon nitride, or free silicon, barium-magnesium-aluminosilicate, and
a first carrier fluid;

drying the deposited base slurry to produce a base green layer;
depositing a transition slurry on the base green layer, wherein the transition slurry contains powders of
a metal oxide,
at least one of silicon carbide, silicon nitride, or free silicon,
at least one of zirconium carbide, zirconium nitride, or zirconium oxide, barium-magnesium-aluminosilicate, and
a second carrier fluid;

drying the deposited transition slurry to produce a transition green layer; and
forming a consolidated coating on the ceramic matrix composite by heating the base green layer and the at least one transition green layer to cause chemical reactions that convert the powders of the at least one of the silicon carbide, silicon nitride, or free silicon and the at least one of the zirconium carbide, zirconium nitride, or zirconium oxide to, respectively, metal-silicon-oxygen rich phase and metal-zirconium-oxygen rich phase.