Method for producing shaped parts made of a graphitized carbon/c

Details Method for producing shaped parts made of a graphitized carbon/c Method for producing shaped parts made of a graphitized carbon/c

1996-02-16

1998-07-07

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

264 292, 264 295, C01B 3100

Patent

active

057763836

ABSTRACT:
Method for producing a shaped part made of a graphitized carbon/carbon composite material in which a compound of carbon fibers is prepared impregnated with a solution of carbon precursors and then cut into sections placed in a mould subjected to a carbonization stage by means of hot unidirectional pressing, wherein, so as to prepare the compound, the fiber is subjected to a heat deoxidation and oil removal treatment followed by a softening in a bath for increasing wettability and hooking and then impregnation in a bath formed of an aqueous solution containing pitch mesophase, high-yield pitch and a binder, the required sufficient calculated amount of compound being placed in bulk in a hot constant volume pressing mould so as to accurately fill the mould at the end of pressing before carrying out said carbonization, the moulded part finally being graphitized at a high temperature. Applications include the aeronautic and spatial fields.

REFERENCES:
patent: 3971669 (1976-07-01), Wrzesien
patent: 4490201 (1984-12-01), Leeds
patent: 5491000 (1996-02-01), Hocquellet
Carbon, vol. 31, No. 5, 1993, Oxford, Great Britain, pp. 731-750, XP397372, K. Christ et al., "Carbon-Fiber-Reinforced Carbon Composites Fabricated with Mesophase Pitch."
Carbon, vol. 32, No. 6, 1994, Great Britain, pp. 1035-1044, N. El Horr et al., "Mesophase Powders (Carbonization and Graphitization)."
Carbon, vol. 32, No. 1, 1994, Great Britain, pp. 61-70, K. Lafdi et al., "An Attempt to Characterize and Elaborate Anisotropic Pitches and Derived Carbon Fibers. Part II: Preparation by Separation."
French Search Report and Annex.

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