STRUCTURAL BODY OF HIGH-STRENGTH CARBON FIBER-REINFORCED CARBON COMPOSITE MATERIAL PROVIDED WITH RIB AND PRODUCTION THEREOF

PURPOSE:To remove deformation in burning and carbonizing a formed body of carbon fiber-reinforced carbon precursor and obtain a high-strength carbon fiber reinforced carbon composite provided with rib having good shape by adding small spherical bodies of mesocarbon into a matrix to become rib of the formed article. CONSTITUTION:In a structural body of carbon fiber reinforced carbon composite material provided with a rib (1 or 2), A carbon fiber reinforced carbon composite material obtained by fixing a carbide and carbonaceous fiber of mesocarbon small spherical body with a carbonaceous matrix derived from a resin are used as the part of rib. The above-mentioned composite material structural body is produced in the following method: A laminate 1 or 2 to constitute a rib obtained by laminating small spherical bodies of mesocarbon and carbon fiber sheet in which a resin solution containing a resin containing >=45% ratio of residual carbon is impregnated is combined with other laminate 4 and filler 3 and these components are subjected to heat forming to give a precursor formed article, which is then burned and carbonized.