Microstructured fiber interface coatings for composites
AssigneeRtx Corporation
InventorsRichard Wesley Jackson, Ying She, Gajawalli V. Srinivasan
Life of this patent
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Abstract
Disclosed is a coated ceramic fiber including a zirconium interface coating layer deposited on the ceramic fiber, a zirconium dioxide interface coating layer adjacent to the zirconium interface coating layer, and an additional interface coating layer adjacent to the zirconium dioxide interface coating layer, wherein zirconium dioxide interface 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.
Claims8
A coated ceramic fiber comprising:
- a zirconium interface coating layer consisting of zirconium metal deposited on the ceramic fiber, a zirconium dioxide interface coating layer directly adjacent to the zirconium interface coating layer, and an additional interface coating layer directly adjacent to the zirconium dioxide interface coating layer, wherein the zirconium dioxide interface coating layer forms micro cracks after a crystal structure transformation;
- wherein the additional interface coating layer consists of zirconium and silicon carbide, zirconium boride, or a combination thereof;
- wherein the zirconium dioxide interface coating layer has a thickness greater than 200 nm and includes monoclinic zirconium dioxide which forms micro cracks after transforming to tetragonal zirconium dioxide and back to monoclinic zirconium dioxide;
- or
- wherein the zirconium dioxide interface coating layer has a thickness less than 200 nm and includes tetragonal zirconium dioxide which forms micro cracks after transforming to monoclinic zirconium dioxide.
A composite material comprising a ceramic matrix material and a plurality of ceramic fibers embedded within the ceramic matrix material wherein the plurality of ceramic fibers comprises a multi-layer interface coating and the multi-layer interface coating comprises a zirconium interface coating layer consisting of zirconium metal deposited on the plurality of ceramic fibers, a zirconium dioxide interface coating layer directly adjacent to the zirconium interface coating layer and an additional interface coating layer directly adjacent to the zirconium dioxide interface coating layer, wherein the zirconium dioxide interface coating layer forms micro cracks after a crystal structure transformation;
- wherein the additional interface coating layer includes silicon carbide, zirconium boride, or a combination thereof;
- wherein the ceramic matrix material includes mullite, cordierite, or a combination thereof;
- wherein the zirconium dioxide interface coating layer has a thickness greater than 200 nm and includes monoclinic zirconium dioxide which forms micro cracks after transforming to tetragonal zirconium dioxide and back to monoclinic zirconium dioxide;
- or
- wherein the zirconium dioxide interface coating layer has a thickness less than 200 nm and includes tetragonal zirconium dioxide which forms micro cracks after transforming to monoclinic zirconium dioxide.
Dependencies are inferred from the claim text.