| 摘要 |
PURPOSE:To enable long-term use and improve the thermal conductivity and productivity by incorporating one or more kinds selected from among boron, silicon, boron compds. and silicon compds. having specified average particle diameter into the matrix under specified conditions. CONSTITUTION:A carbonaceous pitch powder (B) having 1-2mum average particle diameter and one or more kinds of powder (C) selected from among boron, silicon, boron compds. and silicon compds. are dispersed in a soln. comprising a thermosetting resin (A) such as phenol resin and furan resin and an org. solvent having a high boiling point of >=120 deg.C to prepare a soln. for impregnation. The proportions for mixing to prepare the soln. are 5-45wt.% component (A), 0-75wt.% component (B), and 20-95wt.% component (C). The obtd. soln. is used as a matrix precursor and made to impregnate a carbon fiber. The impregnated carbon fibers are laminated in one direction, formed by heating under pressure, and burnt at >=1000 deg.C. Thus, the obtd. UDC/C composite material contains the carbon component having <=10mum average particles diameter uniformly dispersed in the matrix and has 45-75% volume content of carbon fiber. |
