抄録
Porous SiC ceramics were fabricated by the reaction with silicon nitride. SiC powder of 0.6 μm was intinately mixed with 10-30 wt.% silicon nitride by ball-milling. The mixture was formed in the platelet shape and CIPed. The green compact was sintered at 1970°C for 2 h in flowing Ar gas, and then annealed at 1800°C for 2 h inder vacuum. The products had the porosity of 35 to 50%, and 1-2 μm pf mean pore size. The gasification was in duced by the following equation.
Si3N4→3Si+N2↑
The product with 40% porosity showed the bensing strength of about 80 MPa.
