| 摘要 |
PURPOSE:To obtain a carbon fiber-reinforced carbon composite material free from the lowering of breaking strength caused by residual tensile stress by laminating carbon fiber prepregs, hot-pressing the laminate under a specific tension and carbonizing in an inert gas atmosphere without applying a tension. CONSTITUTION:Carbon fiber prepregs formed of carbon fiber and a matrix resin (preferably phenolic resin or furan resin having an actual carbon ratio of >=40%) are laminated and the laminate is hot-pressed by press-forming, autoclave-forming, thermal expansion forming, etc. The forming is carried out under the application of a tension to develop a tensile stress in the carbon fiber prepreg in the longitudinal direction of the carbon fiber corresponding to 10-70% of the tensile strength of the prepreg. The formed product is carbonized in an inert gas atmosphere to obtain the objective carbon fiber-reinforced carbon composite material. |
