| 摘要 |
PURPOSE:To obtain in high efficiency the title lightweight composite outstanding in strength and heat resistance, by coating carbon fiber heat-treated at relatively low temperatures with a tar oil such as anthracene oil, carrying out treatment under press heating followed by impregnation with a thermosetting resin or pitch and then sintering. CONSTITUTION:First, a carbon fiber is produced by infusibilization treatment in air at 280 to 350 deg.C of a fibrous pitch formed by spinning e.g., mesophase pitch or optically isotropic pitch, followed by heat treatment at relatively low temperatures of 500 to 800 deg.C in an inert gas atmosphere. Secondly, this carbon fiber is coated with at least one king of tar oil selected from anthracene oil, coal tar and coal tar pitch. Thirdly, the resultant coated carbon fiber is put into a mold of desired shape, and subjected to press heating treatment at 600 to 800 deg.C pref. in an inert atmosphere under a load of 0.1 to 10kg/cm<2>-G. Finally, the resulting form is impregnated with a thermosetting resin or pitch under pressure to fill the pores therewith followed by sintering while, if needed, preventing the pitch from distilling out, thus obtaining the objective carbonaceous composite. |
