Patent ID: 7011785
Filing Date: 2006-03-14
Classification: C04B,F16D

Abstract:
1. A process for producing hollow bodies comprising fiber-reinforced ceramic materials, where mold cores whose shape corresponds to that of the hollow spaces are produced in a first step, at least one mold core together with a press moulding composition or formable fiber composition are introduced into a mold, where the press moulding composition comprises carbon fibers and/or carbon filaments and thermally curable carbonizable binders, in such a way that the position of the cores corresponds to the desired position of the hollow spaces to be formed in a second step, the composition is cured by heating to a temperature of from 120° C. to 280° C., if appropriate under pressure, in a third step to form a green body, the cured green body is carbonized and/or graphitized in a fourth step by heating in a nonoxidizing atmosphere to a temperature of from about 750° C. to about 2400° C. to give a C/C body, wherein heating in the third and/or fourth step is at least partly effected by an electric current being passed through the pressable composition or the green body and through at least one mold core.