Process for producing sealing components from all-carbon composi

Details Process for producing sealing components from all-carbon composi Process for producing sealing components from all-carbon composi

1991-07-25

1993-01-19

Tentoni, Leo B.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156251, 156267, 1563077, 264 295, 264152, 264163, 264296, 423448, B32B 3118, B32B 3120, C01B 3102

Patent

active

051804590

ABSTRACT:
Process for producing carbon composite components having an edge and a central part with at least one layer of carbon/carbon composite and at least one layer of recompressed expanded graphite to obtain a sealing carbon composite component with a central part having a high deformation level and/or with an edge providing self-bonding of the layers of the component. There is prepared a stack of at least one layer of preimpregnate based on carbon fiber and of at least one layer of expanded graphite of a specific gravity of between 0.03 and 0.06. The stack is compressed under a pressure of between 2.5 and 15 MPa and at a temperature of between 50.degree. and 200.degree. C., in such a way that the thickness of the edge is at least equal to that of the central part and the specific gravity of the expanded graphite is between 0.3 and 0.6 for the edge and between 1 and 1.5 for the central part. The compressed component is treated thermally at a temperature of between 400.degree. and 3000.degree. C. Composite components produced according to this process and their use in the production of heat-exchanger plates and pervaporation modules also is disclosed.

REFERENCES:
patent: 4777083 (1988-10-01), Ono et al.

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