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US 12,649,257 B2Granted
Method for manufacturing multiple seal arc segments
AssigneeRtx Corporation
InventorsBrendan Lenz, John D. Riehl
Life of this patent
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Abstract
A method includes laying-up a fabric made of ceramic tows to form a fiber preform that has a repeating pattern of seal arc sections, densifying the fiber preform with a ceramic matrix material to form a densified ceramic matrix composite body, and then either before or after the densifying, cutting the fiber preform or the densified ceramic matrix composite body, respectively, along boundaries between the seal arc sections to separate the seal arc segments from each other.
Claims7
A method comprising:
- laying-up a ceramic fabric to form a fiber preform that has a repeating pattern of seal arc sections;
- densifying the fiber preform with a ceramic matrix material to form a fully densified ceramic matrix composite body;
- after the densifying, cutting the densified ceramic matrix composite body, respectively, along boundaries between the seal arc sections to separate the seal arc segments from each other, each of the seal arc sections including a rib, and the boundaries are non-intersecting with the rib, wherein the cutting reveals an open porosity on cut surfaces of the densified ceramic matrix composite body;
- and
- sealing the open porosity by applying a coating of ceramic matrix material.
2 more elements
Dependencies are inferred from the claim text.