| 摘要 |
PURPOSE:To obtain a carbon-carbon composite material having a dense and uniform texture by mixing a pitch fiber and carbon powder having self-sintering ability, molding, carbonizing and graphitizing. CONSTITUTION:100 pts. pitch fiber obtained by spinning of raw material pitch and having 0.01-30mm fiber length and 5-25mm fiber diameter or infusible fiber obtained by infusibilization of said pitch fiber in oxidizing atmosphere at 150-500 deg.C for 0.5-5 hour is subjected to surface treatment with adding 100-1000 pts. coking component-containing material (e.g. tar), as necessary, and washed with organic solvent, then dried. Next, 100 pts. said pitch fiber or infusible fiber is mixed with 1-200 pts. carbon powder having <=30mm particle diameter, 3-50% amount of beta-resin and self-sintering ability (e.g. mesocarbon microbeads), molded in inert atmosphere at normal temperature or about 500 deg.C under 1-10ton/ cm<2> pressure, temperature is risen to about 1300 deg.C in a non-oxidizing atmosphere at a temperature-rising speed of 0.1-300 deg.C/hour, kept for 0.5-10 hour to carbonise, then temperature is risen 1500-3000 deg.C at a temperature-rising speed of 0.1-500 deg.C/ hour, thus kept for 0.5-10 hour to graphitize. |
