摘要
以β－Ｓｉ３Ｎ４和ＳｉＯ２粉末为原料，以ＭｇＡｌ２Ｏ４为烧结添加剂，通过无压烧结制备出致密的Ｓｉ２Ｎ２Ｏ陶瓷材料．所得材料由柱状Ｓｉ２Ｎ２Ｏ颗粒和少量β－Ｓｉ３Ｎ４颗粒复合组成，研究了烧结温度对材料显微结构的影响，发现材料的断裂大部分是穿晶断裂．
Dense Si2N2O ceramics were pressurelessly sintered from beta -Si3N4 and SiO2 powders with 4wt% MgAl2O4 additive. Microstructures of this material consisted of rod-like Si2N2O grains and a little amount of beta -Si3N4 The effect of sintering temperatures on the microstructures was studied. Crack deflection profile suggested transgranular fracture of the material.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第1期165-168,共4页
Journal of Inorganic Materials
基金
国家863项目资助!(863-715-006-0110)
关键词
氧氮化硅陶瓷
无压烧结
显微结构
力学性能
silicon oxynitride
pressurelessly sintering
microstructure
mechanical properties
