Swelling of radiation-cured polymer precursor powder for silicon carbide by pyrolysis

武山 昭憲; 出崎 亮; 杉本 雅樹; 吉川 正人

Journal of Asian Ceramic Societies (Internet), 3(4), p.402 - 406, 2015/12

https://doi.org/10.1016/j.jascer.2015.08.003

Ceramic yield, density, volume change and pore size distribution were measured for radiation- and thermally cured (poly carbo silan) PCS powder when they were pyrolyzed in the temperature ranges between 673 and 973 K. Higher ceramic yield was obtained for radiation-cured powder due to smaller amount of evolved gas. Temperature dependence of volume change and the total pore volume show the formation and disappearance of pores in the powders were determined by the volume shrinkage and evolution of decomposed gases. Volume shrinkage narrowed the pore size distribution for radiation-cured powder. For thermally cured powder, the narrowing of size distribution was disturbed by aggregated pores. Smaller amount of evolved gas from radiation-cured powder relative to thermally cured powder prevented the aggregation of pores and provided the narrow size distribution.

画像解析装置(QTM)によるUOペレットの粒度・気孔度および気孔分布の測定

柳澤 和章

JAERI-M 7289, 40 Pages, 1977/09

JAERI-M-7289.pdf:4.17MB

画像解析装置(QTM)を用いた焼きしまり実験解析で得られた知見および技術を明らかにした。QTMの粒径測定の性能は良好であった。そこでQTMを使用して焼きしまり実験に用いたUOペレットの粒径測定を行ないその結果を示した。気孔および気孔分布測定上の問題点とその処理法を明らかにした。そこから得た知見に基づきUOペレットの気孔分布を測定しその結果を示した。