The fabrication of sintered reaction-bonded silicon nitride with β -Si3N4 seed crystal.

摘要

β-Si3N4 seed crystal has been synthesized from α-Si3N4 powder with various liquid phase. Reaction-Bonded Si3N4/SiC composite has been fabricated with β-Si3N4 seed crystals. The Nitridation behavior and the changes in mechanical properties resulting from the addition of seed Crystals were studied before and after Gas-Pressure Sintering. The mechanical properties was affected By the morphology of seed crystal. Highly nitrided RBSN as a results of addition of seed crystals Results in high strength of composites after post sintering.