Process for producing ceramic matrix composites by liquid infilt

Details Process for producing ceramic matrix composites by liquid infilt Process for producing ceramic matrix composites by liquid infilt

1997-04-07

1998-12-29

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

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

Using organometallic or organosilicon intermediate

264640, 264641, 264642, 264643, 423345, C04B 3580

Patent

active

058536531

ABSTRACT:
Ceramic matrix composites (CMC) of high density, preferably of the type SiC/SiC, are provided by a production process based on the infiltration of ceramic fiber cloths with a polymeric precursor solution containing, as fillers, inert powders having size much lower than the mean distance among the ceramic fibers which are used as basic material for the manufacturing of CMC, typically a nanometric granulometry. Such step is followed by the steps of hardening the cloths, pyrolysis of the polymer and repeated thickenings until the desired density is reached. A possible alternative process comprises a brief (<24 hours) treatment of infiltration of SiC from the vapor phase (CVI) with precursors and typical operative parameters for the deposition of silicon carbide followed by the repeated thickenings.

REFERENCES:
patent: 4837230 (1989-06-01), Chen et al.
patent: 5698143 (1997-12-01), Teni

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