| 摘要 |
PURPOSE:To obtain a high-density carbon composite material without carrying out pitch impregnation and carbonizing and calcining after primary calcining, by blending a fiber-reinforcing material with coal-based or petroleum-based tar or pitch, heat-treating to give a matrix raw material covering the surface of the fiber-reinforcing material, oxidizing and infusibilizing the matrix raw material. CONSTITUTION:A fiber reinforcing material consisting of carbon fibers, metallic fibers, inorganic compound fibers, etc. is blended with the above-mentioned tart, pitch or an oil having >=200 deg.C boiling point or a mixed solution thereof. Then, the fiber-reinforcing material incorporated with the mixed solution is heat-treated usually at 200-50 deg.C, especially 380-480 deg.C to stick the pitchy substance to the surface of the fiber-reinforcing material. The fiber-reinforcing material having attached a matrix raw material to the surface is separated from the mixed solution by a method such as filtration under pressure by heating. Then the prepared fiber-reinforcing material coated with a matrix raw material is dried in vacuum at a temperature to evaporate ordinary light substances, oxidized at 200-300 deg.C in air, infusibilized, further molded and carbonized and calcined to give the aimed carbon composite material. |
