SILICON NITRIDE-CARBON FIBER COMPOSITE AND ITS PRODUCTION

摘要

PURPOSE:To obtain a silicon nitride-carbon fiber composite molded body excellent in crushing strength and a silicon nitride-carbon fiber composite sintered compact excellent in toughness by dispersing a specified amt. of short carbon fibers in a silicon nitride matrix. CONSTITUTION:Short carbon fibers are added to an aq. silicon nitride slurry by 0.1-30vol.% to prepare an aq. silicon nitride slurry contg. short carbon fibers. This slurry is molded by a slip casting method and the resulting molded body is sintered under pressure. The short carbon fibers have about. 50mum to 10mm average length and about 5-1,000 aspect ratio (length/diameter).