Manufacture of silicon carbide foam from a polyurethane foam imp

Details Manufacture of silicon carbide foam from a polyurethane foam imp Manufacture of silicon carbide foam from a polyurethane foam imp

1994-04-28

1995-07-04

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

264 43, 264 56, 264 59, 423345, 501 88, 521 54, 521 55, 523218, 523219, 528484, B29C 6500

Patent

active

054297800

ABSTRACT:
A process for preparing a silicon carbide foam by impregnating a polyurethane foam with a suspension of silicon powder in an organic resin, heating progressively to polymerize the resin, heating further to carbonize the polyurethane foam and resin, and finally further heating to carburize the silicon contained in the resin suspension by means of carbon obtained from the carbonization of the foam and resin. The foam obtained is characterized by high macroporosity and a mesoporosity which is variable according to the carburizing temperature.

REFERENCES:
patent: 3345440 (1968-01-01), Googin et al.
patent: 4564496 (1986-01-01), Gupta et al.
patent: 4777152 (1988-10-01), Tsukada
patent: 5093289 (1992-03-01), Braetsch et al.
patent: 5196389 (1993-03-01), Dubots
patent: 5217930 (1993-06-01), Dubots
patent: 5283019 (1994-02-01), Atwell et al.
American Ceramic society Bulletin, vol. 71, No. 11, Nov. 1992, Columbus US, pp. 1674-1682, Saggio et al.

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