Environmental barrier coating
AssigneeRtx Corporation
InventorsXia Tang, Richard Wesley Jackson, III, James T. Beals, David A. Litton, Brian T. Hazel
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Abstract
An article according to an exemplary embodiment of this disclosure, among other possible things includes a substrate and a barrier layer on the substrate. The barrier layer includes a bond coat comprising a matrix, diffusive particles disposed in the matrix, and gettering particles disposed in the matrix; a topcoat; and a porous interlayer disposed between the topcoat and the bond coat. The porous interlayer has a porosity that is greater than a porosity of the topcoat. A slurry composition for applying an interlayer to an article and method of applying a top coat to an article are also disclosed.
Claims16
An article, comprising:
- a substrate;
- and
- a barrier layer on the substrate, the barrier layer including:
- a bond coat comprising a matrix, diffusive particles disposed in the matrix, and gettering particles disposed in the matrix,
- a topcoat, and
- a porous interlayer disposed between the topcoat and the bond coat, the porous interlayer having a porosity that is greater than a porosity of the topcoat:
- wherein the topcoat and the porous interlayer include at least one of hafnia, hafnium silicate, yttrium monosilicate, yttrium disilicate, ytterbium monosilicate, ytterbium disilicate, yttria stabilized zirconia, gadolinia stabilized zirconia, calcium aluminosilicates, mullite, and barium strontium aluminosilicate.
Dependencies are inferred from the claim text.