Thermogravimetry, Differential Thermal Analysis, and Mass Spectrometry Study of the Silicon Nitride–Boron Carbide–Carbon Reaction System for the Synthesis of Silicon Carbide–Boron Nitride Composites
Thermogravimetry, Differential Thermal Analysis, and Mass Spectrometry Study of the Silicon Nitride–Boron Carbide–Carbon Reaction System for the Synthesis of Silicon Carbide–Boron Nitride Composites
复制标题
DOI：
10.1111/j.1151-2916.2002.tb00444.x
复制
发表时间：
2002-09
影响因子：
3.9
通讯作者：
Guo‐Jun Zhang;Jianfeng Yang;T. Ohji
中科院分区：
文献类型：
--
作者：
Guo‐Jun Zhang;Jianfeng Yang;T. Ohji
采用热重分析、差热分析、质谱分析和X射线衍射分析等方法研究了Si 3 N4、B4 C和碳原位反应合成碳化硅-氮化硼复合材料的反应过程。具有低氮分压的气氛（例如氩气+5%-10%氮）似乎抑制脱氮并且还保持高反应速率。然而，在纯氮气氛中，反应速率显著降低。实验质谱结果还表明，在Si 3 N4-B4 C-C体系中，B4 C抑制了Si 3 N4与碳的反应，甚至抑制了Si 3 N4的分解。结果表明，硼可以作为高温Si-N-C系陶瓷材料的成分稳定剂。
Thermogravimetry, differential thermal analysis, mass spectrometry, and X-ray diffractometry were used to study the reaction process of the in situ reaction between Si3N4, B4C, and carbon for the synthesis of silicon carbide–boron nitride composites. Atmospheres with a low partial pressure of nitrogen (for example argon + 5%–10% nitrogen) seemed to inhibit denitrification and also maintain a high reaction rate. However, the reaction rate decreased significantly in a pure nitrogen atmosphere. The experimental mass spectrometry results also revealed that B4C in the Si3N4–B4C–C system inhibited the reaction between Si3N4 and carbon and, even, the decomposition of Si3N4. The present results indicate that boron could be a composition stabilizer for ceramic materials in the Si-N-C system used at high temperature.