| 摘要 |
PURPOSE:To make the composite ceramic dense and to improve the strength and density of it by compacting a SiC powder coated with a mesophase containing pitch and heating it in a nonoxidizing atmosphere to impregrate at with Si. CONSTITUTION:A compact is obtained by granulating SiC powder coated with 0.10-80wt.% mesophase containing pitch and having 0.1-100mum average particle diameter and compacting it. A SiC-C heat treated fired body is obtained by heat treating the compact in the nonoxidizing atmosphere at 900-1800 deg.C to carbonizing >=90% of the mesophase containing pitch. The fired body is impregnated with Si in an inert gas atmosphere or vacuum at 1450-1700 deg.C. |
