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AssigneeSiemens Energy, Inc.
InventorsJay E. Lane, Jay A. Morrison, Steven C. Butner, Andrew Szweda
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A ceramic matrix composite (CMC) material (10) with increased interlaminar strength is obtained without a corresponding debit in other mechanical properties. This is achieved by infusing a diffusion barrier layer (20) into an existing porous matrix CMC to coat the exposed first matrix phase (19) and fibers (12), and then densifying the matrix with repeated infiltration cycles of a second matrix phase (22). The diffusion barrier prevents undesirable sintering between the matrix phases and between the second matrix phase and the fibers during subsequent final firing and use of the resulting component (30) in a high temperature environment.
A ceramic matrix composite material comprising ceramic fibers disposed within a porous ceramic matrix, the porous ceramic matrix comprising a first sinterable bisque fired phase separated from a second sinterable phase by a diffusion barrier material infused into the first sinterable bisque fired phase, the diffusion barrier material being effective to prevent sintering between the first and second sinterable phases, the second sinterable phase being effective to densify the porous ceramic matrix.
A ceramic matrix composite material comprising:
Dependencies are inferred from the claim text.