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US 12,613,034 B1Granted
Ceramic matrix composite component with corrugated wall
AssigneeRtx Corporation
InventorsCheng Gao, Howard J. Liles
Life of this patent
Estimating the term…
Abstract
The disclosure describes CMC components having structures which ameliorate stress induced by thermal expansion and methods for manufacturing CMC components with such structures. The CMC component, for example, a blade outer air seals (BOAS) is provided with a cooling cavity having a cavity top wall. The cavity top wall is provided with curvatures, such as corrugations or dimples, that allow the cavity top wall to expand and thereby reduce stress induced by thermal expansion.
Claims20
A ceramic matrix composite (CMC) component comprising:
- a ceramic matrix composite substrate comprising ceramic fiber tows within a ceramic matrix, the substrate having a bottom surface and an upper surface;
- and
- a cooling cavity within an interior region of the substrate, the cooling cavity being defined by a cavity bottom wall, a cavity top wall, and cavity side walls;
- wherein the cavity top wall is provided with curvatures to allow for expansion of the cavity top wall of the substrate.
1 more element
A method of preparing a ceramic matrix composite comprising:
- providing a ceramic matrix composite preform comprising a preform substrate having ceramic fiber tows, the preform substrate having a bottom surface and an upper surface;
- forming a cooling cavity within the preform, the cooling cavity being defined by a cavity bottom wall, a cavity top wall, and cavity side wall;
- and
- wherein the cavity top wall is provided with curvatures to allow for expansion of the cavity top wall of the substrate;
- and
- subjecting the preform to densification to form the ceramic matrix composite.
3 more elements
A turbine engine comprising:
- a fan section, a compressor section, a combustion chamber, and a turbine section, the turbine section including at least one rotor and one or more turbine blade(s) extending radially outwardly from the at least one rotor;
- and
- a blade outer air seal assembly positioned between the one or more turbine blade(s) and an outer casing to the engine;
- wherein the blade outer air seal assembly is formed of a plurality blade outer air seal segments, wherein each blade outer air seal segment comprises:
- a ceramic matrix composite substrate comprising ceramic fiber tows within a ceramic matrix, the substrate having a bottom surface and an upper surface;
- and
- a cooling cavity within an interior region of the substrate, the cooling cavity being defined by a cavity bottom wall, a cavity top wall, and cavity side walls;
- wherein the cavity top wall is provided with curvatures to allow for expansion of the cavity top wall of the substrate.
5 more elements
Dependencies are inferred from the claim text.