The Reaction Behavior of α-Si3N4 Powder at 1100-1500 °C Under Different Oxidizing Conditions

被引：10
作者：
Wang, E. H. [1 ]
Dong, H. [1 ]
Chen, J. H. [2 ]
Chou, K. C. [1 ]
Hou, X. M. [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
OXIDATION OF METALS | 2015年 / 84卷 / 1-2期
关键词：
alpha-Si3N4; powder; Different oxidizing conditions; Kinetics; VAPOR CORROSION BEHAVIOR; SILICON-NITRIDE CERAMICS; WATER-VAPOR; PARALINEAR OXIDATION; WET AIR; SI3N4; ADDITIVES; TEMPERATURE; DEPOSITION; STRENGTH;
D O I：
10.1007/s11085-015-9549-0
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The reaction behavior of alpha-Si3N4 powder at 1100-1500 A degrees C for 10 h under different oxidizing conditions was investigated using thermogravimetric analysis. The phase constitution and microstructure were characterized using X-ray diffraction, optical microscope, scanning electron microscopy, transmission electron microscope and fourier transformation infrared spectroscopy. The results showed that the reaction behavior of alpha-Si3N4 powder varies depending on temperature and the oxidizing atmosphere. At 1100-1200 A degrees C, water vapor enhanced the reaction due to its specifically inward oxidation. Above 1300 A degrees C, H2O further reacted with SiO2 to form silicon tetrahydroxide, which caused the reaction behavior to follow the paralinear rate law.
引用
收藏
页码：169 / 184
页数：16
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