CARBON-BASE METAL COMPOSITE MATERIAL AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To improve defects of a carbon material such as brittleness, insufficient strength, easy oxidizability, inferior scuffing resistance and low surface workability and to obtain a carbon material having an enhanced heat conductivity and a coefficient of thermal expansion adjusted according to the purpose of use. SOLUTION: A molten metal is pressurized and impregnated into a carbon molding with the pressing member of a pressure device to produce the objective carbon-base metal composite material. The temperature of the molten metal is higher than the melting point of the metal by 50-250 deg.C and pressure applied to the molten metal is >=200 kg/cm2 per unit cross-sectional area of the pressing member. The carbon-base metal composite material consists of a carbonaceous matrix and the metal dispersed in the matrix, >=90 vol.% of the pores in the matrix have been substituted by the metal and the metal content of the composite material is <=35% of the total volume.