Environmental barrier coating
AssigneeRtx Corporation
InventorsRichard Wesley Jackson, III, Xia Tang, James T. Beals
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Abstract
A coating according to an exemplary embodiment of this disclosure, among other possible things includes a bond coat including gettering particles and diffusive particles dispersed in a matrix; a top coat disposed over the bond coat, the top coat includes metal silicate particles; and an intermediate layer between the bond coat and the top coat. The intermediate layer includes hafnium silicate particles and matrix. A concentration of metal silicate in the intermediate layer is less than a concentration of metal silicate in the top coat. An article is also disclosed.
Claims20
A coating, comprising:
- a bond coat including gettering particles and diffusive particles dispersed in a matrix;
- a top coat disposed over the bond coat, the top coat include metal silicate particles;
- and
- an intermediate layer between the bond coat and the top coat, the intermediate layer including hafnium silicate particles and matrix, wherein a concentration of the hafnium silicate particles in the intermediate layer is less than a concentration of the metal silicate particles in the top coat.
An article, comprising:
- a ceramic matrix composite substrate;
- and
- a coating disposed over the ceramic matrix composite substrate, the coating including
- a bond coat including gettering particles and diffusive particles dispersed in a matrix;
- a top coat disposed over the bond coat, the top coat include metal silicate particles and
- an intermediate layer between the bond coat and the top coat, the intermediate layer including hafnium silicate particles and matrix, wherein a concentration of the hafnium silicate particles in the intermediate layer is less than a concentration of the metal silicate particles in the top coat.
Dependencies are inferred from the claim text.