【摘 要】
：
Porous silicon nitride(Si3N4)shows superior properties in strength,toughness,thermal shock resistance due to the formation of interlocking microstructure.Po
【机 构】
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Shanghai Institute of ceramics,Shanghai,China
【出 处】
：
The 5th International Congress on Ceramics, ICC5(第五届国际陶瓷大会)
论文部分内容阅读
Porous silicon nitride(Si3N4)shows superior properties in strength,toughness,thermal shock resistance due to the formation of interlocking microstructure.Porous silicon nitride ceramics were prepared via sintered reaction bonded silicon nitride at 1680℃.The effects of raw Si size,Y2O3 particle size,and second phase on phase formation,microstructure,and mechanical properties were investigated.The grain size of nitrided Si3N4 and diameter of post-sintered β-Si3N4 are controlled by the size of raw Si.Porosity of 42.14%to 46.54%and flexural strength from 143MPa to 167MPa were obtained.
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