Method for densification of CMC article
AssigneeRtx Corporation
InventorRaymond Surace
Life of this patent
Estimating the term…
Abstract
A method for forming a CMC article includes wrapping first ceramic fibers around a mandrel to form inner fabric layers on the mandrel, depositing a first interface coating material on the first ceramic fibers, densifying the inner fabric layers to a partially-densified state with first ceramic matrix material, wrapping second ceramic fibers around the inner fabric layers to form outer fabric layers around the mandrel, depositing a second interface coating material on the second ceramic fibers, and densifying both the inner fabric layers and the outer fabric layers to a final-densified state with second ceramic matrix material.
Claims11
A method for forming a ceramic matrix composite (CMC) article, the method comprising:
- wrapping first ceramic fibers around a mandrel to form inner fabric layers on the mandrel;
- depositing a first interface coating material on the first ceramic fibers;
- densifying the inner fabric layers to a partially-densified state with first ceramic matrix material, wherein in the partially-densified state the inner fabric layers have a remaining porosity that leaves open paths;
- wrapping second ceramic fibers around the inner fabric layers to form outer fabric layers on the mandrel;
- depositing a second interface coating material on the second ceramic fibers;
- and
- densifying both the inner fabric layers and the outer fabric layers by vapor deposition to a final-densified state with second ceramic matrix material, the vapor deposition infiltrating into the inner fabric layers via the open paths to densify the inner fabric layers.
Dependencies are inferred from the claim text.