Process for the manufacture of a fiber reinforced composite mate

Details Process for the manufacture of a fiber reinforced composite mate Process for the manufacture of a fiber reinforced composite mate

1993-12-21

1995-12-19

Beck, Shrive

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

4272557, 4272481, 427314, C23C 1602

Patent

active

054766850

ABSTRACT:
In a process according to the invention, before a carbon/fiber ceramic matrix is densified, the carbon fiber reinforcement material is subjected to a thermal treatment in a non-oxidizing environment at a temperature greater than 1300.degree. C. and less than 2200.degree. C., to act on the bonding between the fibers and the matrix. If a preform of the carbon fiber reinforcement material is formed prior to densification by a matrix, then the thermal treatment may be performed on the preform, prior to densification by the matrix. If the matrix is densified by chemical vapor infiltration inside a furnace, then the thermal treatment may be performed inside the infiltration furnace prior to the densification. The thermal treatment achieves a significant improvement in the strength of the resulting composite material.

REFERENCES:
patent: 4397901 (1983-08-01), Warren
patent: 4752503 (1988-06-01), Thebault
patent: 4766013 (1988-08-01), Warren
patent: 5045356 (1991-09-01), Uemura et al.
World Patent Index (Latest), accession No. 82-66381E, Derwet Publications Ltd. Londres, B. G. & BG-A-2,092,119 (General Electric Co.) Nov. 8, 1982.
Journal of Materials Science, "Thermal Diffusivity of Chemically Vapour Deposited Silicon Carbide Reinforced with Silicon of Carbon Fibres", vol. 20, No. 9, Sep. 1985, pp. 3201-3212.

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