| 摘要 |
PURPOSE: To efficiently produce a high density and high strength carbon fiber reinforced carbon composite material. CONSTITUTION: A matrix binder is impregnated into carbon fibers, combined, molded and carbonized by firing in a nonoxidizing atmosphere to obtain a C/C composite as a base material. This C/C base material is densified through 1st and 2nd densifying processes. In the 1st process, pitch is impregnated into the base material and carbonized by firing at 800-1,200 deg.C in a nonoxidizing atmosphere and the impregnation-carbonization is repeated plural times so as to increase the bulk density of the resultant material to 1.1-1.5g/cc. In the 2nd process, a liq. thermosetting resin is impregnated, cured and carbonized by firing at 800-1,200 deg.C in a nonoxidizing atmosphere and the impregnation- curing-carbonization is repeated plural times so as to increase the bulk density of the resultant material to >=1.6g/cc. |
