Ceramic matrix composite article and method of making the same
AssigneeRtx Corporation
InventorsRichard Wesley Jackson, Mary Colby, Tyler G. Vincent
Life of this patent
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Abstract
A method includes forming a ceramic matrix composite component by infiltrating an array of ceramic-based fibers with a ceramic-based matrix; forming a plurality of cooling holes in the ceramic matrix composite component; applying a slurry of particles in a carrier fluid to the ceramic matrix composite component such that the slurry passes through the cooling holes and wicks into the ceramic matrix composite material; and processing the ceramic matrix composite component to remove the carrier fluid, thereby leaving a filler at a wall surface of the plurality of cooling holes. A component is also disclosed.
Claims18
A method of making a ceramic matrix composite component, comprising:
- forming a ceramic matrix composite component by infiltrating an array of ceramic-based fibers with a ceramic-based matrix;
- forming a plurality of cooling holes in the ceramic matrix composite component;
- after forming the plurality of cooling holes in the ceramic matrix composite component, applying a slurry of particles in a carrier fluid to the ceramic matrix composite component such that the slurry passes through the cooling holes and wicks into the ceramic matrix composite material;
- and
- processing the ceramic matrix composite component to remove the carrier fluid, thereby leaving a filler at a wall surface of the plurality of cooling holes,
- wherein the slurry is a first slurry and the particles are a first plurality of particles, and further comprising applying a second slurry having a second plurality of particles to the first slurry, wherein the second plurality of particles have a smaller average particle size than the first plurality of particles.
A component, comprising:
- a ceramic matrix composite material including an array of ceramic-based fibers disposed in a ceramic-based matrix;
- a plurality of cooling holes formed through the ceramic matrix composite material;
- and
- a filler at a wall surface of each of the plurality of cooling holes, the filler including a plurality of particles filling in surface roughness at the cooling hole wall surfaces,
- wherein the filler includes an outer region defining the wall surface of the plurality of cooling holes and an inner region located between the ceramic matrix composite material and the outer region, and wherein an average size of the plurality of particles in the inner region is larger than an average size of the plurality of particles in the outer region.
Dependencies are inferred from the claim text.