| 摘要 |
PURPOSE:To obtain a carbon-fiber reinforced composite material excellent in oxidation resistance without peeling, etc., of the surface by depositing and coating carbon on the surface of a carbon/carbon composite material by vapor- phase thermal decomposition and further depositing and coating ceramics on the resultant surface by the vapor-phase thermal decomposition. CONSTITUTION:Carbon is deposited and coated on the surface of a carbon/ carbon composite material composed of carbon fibers and carbonaceous matrix or three-dimensional carbon fiber woven fabric by vapor-phase thermal decomposition. In this process, the vapor-phase thermal decomposition is preferably carried out at a temperature under a pressure in which the temperature pressure coefficient (X) defined by the formula [T is the temperature ( deg.K) in carrying out the vapor-phase thermal decomposition; P is the pressure (Torr) in performing the vapor-phase thermal decomposition] is <=3.29 to provide depositing and coating of carbon thereon. The vapor-phase thermal decomposition is subsequently carried out to perform depositing and coating of ceramics on the resultant surface. Thereby, the carbon-fiber reinforced composite material having oxidation resistance is obtained. |
