Ceramic matrix composites with integrated topcoat layers

Details Ceramic matrix composites with integrated topcoat layers Ceramic matrix composites with integrated topcoat layers

1996-07-25

1999-05-11

Raimund, Christopher

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Woven fabric

Woven fabric including an additional woven fabric layer

442246, 442249, 428141, 264258, B32B3/10

Patent

active

059027568

ABSTRACT:
The present invention is a fiber reinforced ceramic matrix composite substrate with an integrated ceramic topcoat layer. The composite substrate is prepared by laminating a preceramic polymer impregnated fiber cloth, curing the laminate, and pyrolyzing the resulting substrate to an initial state. The composite substrate is re-infiltrated with the preceramic polymer, cured, and pyrolyzed to an initial densification level. The topcoat layer is then integrated with the composite substrate by applying transition plies to an exterior surface of the composite substrate, forming a particulate slurry from a ceramic powder and the preceramic resin, and applying the particulate slurry to the transition plies. The transition plies-particulate slurry layup on the composite substrate is autoclave cured and pyrolyzed. The composite substrate is then re-impregnated with the preceramic resin matrix material, cureclave cured, and step pyrolyzed to a desired densification level.

REFERENCES:
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patent: 5208192 (1993-05-01), Yu et al.
patent: 5212124 (1993-05-01), Newkirk
patent: 5268234 (1993-12-01), LaRoche, Jr.
patent: 5306676 (1994-04-01), Johnson
patent: 5348760 (1994-09-01), Parker et al.
patent: 5352529 (1994-10-01), Scanlon et al.

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