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Abstract

A method of making a smooth surfaced, fiber reinforced ceramic matrix composite includes the steps of providing a fiber preform, the preform having a surface containing voids; placing fibers into the voids; coating the preform fibers and the void fibers with a coating material to create a weak interface; and infiltrating the coated fibers with a matrix material to infill the voids and preform, and form strongly bonded networks within the voids. Alternatively, the resulting smooth surfaced, fiber reinforced ceramic matrix composite may include, in addition to the first coating material on the preform fibers and the void fibers and the matrix material within the coated fibers and the preform to infill the voids and preform, a second coating material on the preform fibers and the void fibers, creating a second coating of substantially uniform thickness on the fibers and forming strongly bonded networks within the voids.

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First Claim