硅酸盐学报2011，Vol.39Issue(8)：1329-1333,5.
还原气氛下闪速燃烧合成氮化硅铁的高温行为
High Temperature Behavior of Ferro-Silicon Nitride Prepared by Flash Combustion Synthesis at Reducing Atmosphere
宋文 1陈俊红 1李勇 1孙加林1
作者信息
- 1. 北京科技大学材料科学与工程学院,北京100083
- 折叠
摘要
Abstract
This paper focused on the behaviors of ferro–silicon nitride at high temperature and reducing atmosphere to simulate the service environment of ferro–silicon nitride prepared by flash combustion synthesis.The specimen was sintered surrounded by the carbon in air to control partial pressure of oxygen at a low level on the basis of thermodynamic calculation.Ferro–silicon nitride was sintered at 1 300 ℃ and 1 500 ℃ separately and insulated for 300 min then got rapid hydrocooling to keep the microstructure at high temperature.Phase composition and microstructure of the specimens were studied by X-ray diffraction and scanning electron micro-scope.Results show that ferro–silicon nitride contained α-Si3N4,β-Si3N4,SiO2 and Fe3Si at room temperature.α-Si3N4 converted into β-Si3N4 and SiO2 decomposed at high temperature in reducing atmosphere,while Fe3Si was stable.Silicon nitride was decomposed into small grains with bigger specific surface area and reaction activity.And Si2N2O formed on the surface of silicon nitride.关键词
氮化硅铁/闪速燃烧合成/还原气氛Key words
ferro-silicon nitride/flash combustion synthesis/reducing atmosphere分类
化学工程引用本文复制引用
宋文,陈俊红,李勇,孙加林..还原气氛下闪速燃烧合成氮化硅铁的高温行为[J].硅酸盐学报,2011,39(8):1329-1333,5.
