Process for producing carbon fiber reinforced carbon materials

Details Process for producing carbon fiber reinforced carbon materials Process for producing carbon fiber reinforced carbon materials

1991-07-02

1993-04-27

Tentoni, Leo B.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156242, 264 295, 264 296, 264 297, 264136, 4234474, 4234477, 4234478, 423448, 427228, 427377, 427379, B29C 4318, C01B 3104

Patent

active

052058883

ABSTRACT:
A process for making carbon fiber reinforced materials which not only have desirable qualities which include high strength, high heat resistance, chemical resistance, wear resistance and lightweightness but also which are produced in a short time and at low cost. The process includes the steps of impregnating a carbon fiber assembly with a melt of mesophase pitch or mixing short carbon fibers with the mesophase pitch, shaping the pitch-impregnated assembly or the pitch/short carbon fiber mixture, and firing the same. The process requires that the mesophase pitch used in the process be almost 100% of an optical anistropic phase as examined under a polarizing microscope; have a softening point of no higher than 350.degree. C. and be capable of being carbonized in a yield of at least 70% when gradually heated to a temperature of about 600.degree. C. in an inert gas atmosphere and then held at that temperature for two hours.

REFERENCES:
patent: 4029829 (1977-05-01), Weaver et al.
patent: 4490201 (1984-12-01), Leeds
patent: 4891126 (1990-01-01), Mochida et al.
patent: 5061414 (1991-10-01), Engle
patent: 5096519 (1992-03-01), Kawakubo et al.

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