Method of manufacturing a composite material with vitroceramic o

Details Method of manufacturing a composite material with vitroceramic o Method of manufacturing a composite material with vitroceramic o

1988-12-20

1992-06-30

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264136, 264137, 427370, 427379, 427380, B23B 326, B29C 6700

Patent

active

051260875

ABSTRACT:
A method of manufacturing a composite material formed of a fibrous reinforcement and a silica based ceramic or vitro-ceramic matrix. The method includes impregnating the fibrous reinforcement by means of a sol-gel process wherein premature crystallization of the matrix obtained from the sol is hindered by addition to the sol of a crystallization retarding agent, and hot pressing the resulting material. The composite material formed has a residual porosity without the addition of nucleating agents of about less than 10%.

REFERENCES:
patent: 4460639 (1984-07-01), Chi et al.
patent: 4642271 (1987-02-01), Rice
Osaka et al, "Sodium Borosilicate Glasses Prepared by The Sol-Gel Proces", Journal of Non-Crystalline Solids vol. 100, Nos. 1-3, Mar. 1988, p. 412.
Villegas et al, "Hydrolytic Resistance of Na.sub.2 O--B.sub.2 O.sub.3 --SiO.sub.2 Gels Prepared by Sol-Gel Process", Journal of Non-Crystalline Solids vol. 100, Nos. 1-3, Mar. 1988 p. 460.

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