氮化硅陶瓷烧结过程中的致密化与相变  

DENSIFICATION AND PHASE TRANSFORMATION DURINGSINTERING OF Si 3N 4 MgO CeO 2 CERAMICS

作　　者：杨海涛[1] 汤宇凌[1] 徐润泽[2] 黄培云[2] 

机构地区：[1]武汉工业大学新材料研究所 [2]中南工业大学粉末冶金研究所

出　　处：《中国有色金属学报》1996年第4期150-153,共4页The Chinese Journal of Nonferrous Metals

摘　　要：讨论了Ｓｉ３Ｎ４ＭｇＯＣｅＯ２陶瓷常压烧结过程中的致密化与相变。指出：对于Ｓｉ３Ｎ４ＭｇＯＣｅＯ２陶瓷，在１５００～１５５０℃为快速致密化阶段，在１５５０℃致密化过程已接近完成，αＳｉ３Ｎ４→βＳｉ３Ｎ４的相转变过程滞后于致密化过程，在１５５０～１６００℃为β相转变百分数急剧增加阶段，在１６００℃，α→β相变接近完成，α→β相变与其致密化并无直接。The effect of pressureless sintering on the densification and phase transformation of Si 3N 4 MgO CeO 2 ceramics was studied. For the Si 3N 4 MgO CeO 2 ceramics, the densification process took place rapidly from 1 500 to 1 550 ℃ and nearly completed at 1 550 ℃; the phase transformation from α Si 3N 4 to β Si 3N 4 took place rapidly from 1 550 to 1 600 ℃ and nearly completed at 1 600 ℃. The phase transformation process is behind the densification process and does not necessarily promote the densification of the Si 3N 4 MgO CeO 2 ceramics.

关 键 词：氮化硅 致密化 相变 陶瓷 烧结过程 粉末 

分 类 号：TF125.41[冶金工程—粉末冶金]