| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition sufficiently high in heat conductivity in the fiber orientation but sufficiently low in the direction perpendicular to the orientation direction, excellent in processing precision, hardly cracking, improved in adhesiveness to a metal and excellent in heat resistance and thermal shock resistance, by specifying the ratio of an open pore volume to the whole pore volume and the ratio of the open pore to the whole volume of a parent material part and specifying the average diameter of the pores in a unidirectional carbon fiber reinforced composite material. SOLUTION: In this composite material comprising a parent material composed of carbon and a ceramic, an open pore volume (mercury porosimetry method) is >=90% the whole pore volume and 30-60% the whole volume of a parent material part and the average particle diameter of the pores is <=2μm. The thermal conductivity (500K) of the composite material is >=100W/m.K in the orientation direction of carbon fiber and <=10W/m.K in the direction perpendicular to the orientation direction. The composite material is produced by impregnating a carbon fiber bundle orientated in one direction with a solution composed of a thermosetting resin, carbon powder and ceramic powder having <=0.5μm average particle diameter, respectively and a solvent, molding under pressure by heating and baking. |
