PROCESS OF PRODUCING CERAMIC MATRIX COMPOSITES, AND CERAMIC MATRIX COMPOSITES FORMED THEREBY

Japanese Patent JP2015212215

A

PROBLEM TO BE SOLVED: To provide a process for producing ceramic matrix composite (CMC) articles that includes reducing the presence of porosity and voids within the articles.SOLUTION: A process for producing a CMC article comprises: producing unidirectional prepregs comprising a slurry and a fiber reinforcement material; stacking the prepregs to form a preform; firing the preform to yield a porous fired preform comprising the fiber reinforcement material and a CMC; then heating the preform and a fill material to melt the fill material and thereby creating a vacuum to partially fill voids within the preform thereby infiltrating the molten fill material into and densifying the preform; while the fill material remains molten within the voids, subjecting the preform and the molten fill material to an increased pressure to further fill the voids with the molten fill material; and, while the preform and the molten fill material therein remain subjected to the increased pressure, cooling the preform and the fill material to solidify the fill material within the voids.

GRAY PAUL E

JP2015039749A

November 26, 2015

March 02, 2015

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GEN ELECTRIC

C04B35/80; F01D5/28; F01D25/00; F02C7/00; F23R3/42

Arakawa Satoshi
Hirokazu Ogura
Toshihisa Kurokawa
Takuto Tanaka

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