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US 10,934,626 B2Granted
Segmented environmental barrier coating systems and methods of forming the same
AssigneeGeneral Electric Company
InventorsJulin Wan, Larry Steven Rosenzweig
Life of this patent
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Abstract
Methods for preparing an environmental barrier coating and the resulting coating are provided. The methods and products include the incorporation of a continuous ceramic inner layer and a segmented ceramic outer layer on a CMC component. The segmented ceramic outer layer may be formed by thermal spray techniques. The coating is more stable at higher temperatures and provides for a longer lifetime of the coated component.
Claims19
A coated component comprising:
- a substrate defining a surface and comprising a ceramic composite,
- an inner layer defining a surface and disposed along the surface of the substrate, and
- an outer layer disposed along the surface of the inner layer,
- wherein the inner layer comprises ceramic material, has a porosity of less than about 40% by volume, and is continuous along the outer layer, and
- wherein the outer layer comprises a plurality of growth domains defined between domain boundaries, the plurality of growth domains comprising a comparatively high density of a coating material and the domain boundaries comprising a comparatively low density of the coating material, the growth domains and domain boundaries having a plurality of pre-condensed matter particles that have been at least partially melted before impinging the surface and solidified thereon, wherein the domain boundaries comprise a density of the coating material greater than 0% and are configured to accommodate expansion and shrinkage of the growth domains.
2 more elements
Dependencies are inferred from the claim text.