Method of forming CMC component

Details Method of forming CMC component Method of forming CMC component

2005-07-25

2009-06-23

Griffin, Steven P (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Shaping or treating of multilayered, impregnated, or...

C264S640000, C264S641000

Reexamination Certificate

active

07550107

ABSTRACT:
A method of forming a ceramic matrix composite (CMC) article (30) or a composite article (60) that minimizes the risk of delaminations while simultaneously maintaining a desired degree of porosity in the material. A pressure P applied against a surface of the article during a sintering process is controlled to be high enough to resist a separation force between the plies (66) of the CMC material (62) caused by anisotropic shrinkage of the material and/or to resist a separation force caused by differential shrinkage between the CMC material and an adjoined monolithic ceramic material (64). The pressure is also controlled to be low enough to avoid undue consolidation of the materials and to provide a desired degree of porosity in the sintered article. The pressure may be applied by delta-alpha tooling, and it may be varied verses the time of the sintering heating and/or across the article surface.

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T. Radsick, B. Saruhan, H. Schneider, Damage Tolerant Oxide/Oxide Fiber Laminate Composites, Journal of the European Ceramic Society, May 2000, pp. 545-550, vol. 20, No. 5, XP004193032, ISSN 0955-2219, Elsevier Science Publishers, Barking, Essex, GB.

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