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US 12,428,351 B2Granted
Microstructured fiber interface coatings for composites
AssigneeRtx Corporation
InventorsRichard Wesley Jackson, Ying She, Gajawalli V. Srinivasan
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Abstract
Disclosed is a coated ceramic fiber including a silicon carbide coating layer adjacent to the ceramic fiber and a silicon dioxide coating layer adjacent to the silicon carbide coating layer, wherein the silicon dioxide coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.
Claims13
A coated ceramic fiber comprising:
- a silicon carbide coating layer adjacent to the ceramic fiber, wherein a portion of the silicon carbide coating layer is oxidized to form amorphous silicon dioxide, and
- a silicon dioxide coating layer adjacent to the silicon carbide coating layer, wherein the silicon dioxide coating layer includes the amorphous silicon dioxide;
- an additional coating layer adjacent to the silicon dioxide coating layer;
- wherein the additional coating layer adjacent to the silicon dioxide coating layer includes zirconium, zirconium boride, or combination thereof, and is opposedly disposed on a surface of the silicon dioxide from the surface that contacts the silicon carbide coating,
- wherein the silicon dioxide coating layer forms micro cracks after a crystal structure transformation,
- wherein the silicon dioxide coating layer includes silicon dioxide in β cristobalite form which forms micro cracks after transforming to α cristobalite form.
3 more elements
A composite material comprising:
- a ceramic matrix material and a plurality of ceramic fibers embedded within the ceramic matrix material,
- wherein the ceramic fibers of the plurality of ceramic fibers comprise carbon, hafnium carbide, zirconium carbide, tantalum carbide, niobium carbide, boron carbide, titanium carbide, hafnium boride, zirconium boride, tantalum boride, niobium boride, titanium boride, or a combination thereof,
- wherein the plurality of ceramic fibers comprise a multi-layer interface coating and the multi-layer interface coating comprises a silicon carbide coating layer adjacent to the plurality of ceramic fibers, and
- a silicon dioxide coating layer deposited onto the silicon carbide coating layer, wherein the silicon dioxide coating layer includes amorphous silicon dioxide,
- wherein the silicon dioxide coating layer forms micro cracks after a crystal structure transformation, and
- wherein the silicon dioxide coating layer includes silicon dioxide in β cristobalite form which forms micro cracks after transforming to α cristobalite form.
3 more elements
A method for forming a multi-layer interface coating onto a ceramic fiber comprising:
- depositing a silicon carbide coating layer onto the fiber,
- oxidizing a portion of the silicon carbide coating layer to form an amorphous silicon dioxide coating layer,
- depositing an additional coating layer on the amorphous silicon dioxide coating layer, and
- crystallizing the amorphous silicon dioxide layer to beta cristobalite,
- wherein the beta cristobalite forms micro cracks in the silicon dioxide coating layer after transforming to a cristobalite form.
2 more elements
Dependencies are inferred from the claim text.