Method of fabrication of composites

Details Method of fabrication of composites Method of fabrication of composites

1993-03-05

1994-09-27

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

264 297, 264 62, 264 81, 264258, C04B 3580

Patent

active

053505450

ABSTRACT:
A method of making a fiber-reinforced ceramic matrix composite of complex shape by first rigidifying a fibrous arrangement made of woven or braided material by impregnating with a preceramic resin, and then curing and pyrolyzing the resin to form a rigid or stiff preform. The rigid preform is then densified by chemical vapor infiltration, e.g., using a forced-flow/thermal-gradient process. Using three-dimensional woven fabrics made of ceramic fibers, such as silicon carbide or silicon nitride, strong high-temperature resistant composites are produced having porosities from about 20 percent to less than about 5 percent.

REFERENCES:
patent: 4837230 (1989-06-01), Chen
patent: 4895108 (1990-01-01), Caputo
patent: 4963301 (1990-10-01), Davis
patent: 5067999 (1991-11-01), Streckert

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