| 原位燃烧合成Si3N4/Ti(C,N)/SiC复相陶瓷热力学分析 |
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| 引用本文： | 李江涛,葛昌纯.原位燃烧合成Si3N4/Ti(C,N)/SiC复相陶瓷热力学分析[J].硅酸盐学报,1998,26(3):300-304. |
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| 作者姓名： | 李江涛 葛昌纯 |
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| 作者单位： | 北京科技大学特种陶瓷与粉末冶金研究开发中心 |
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| 摘 要： | 研究了用ＴｉＣ作添加剂时Ｓｉ粉坯在高压氮气中的燃烧行为，结果表明：ＴｉＣ加入量对燃烧合成产物的相组成有重要影响，原因在于ＴｉＣ加入量直接影响燃烧过程中氮气向反应前沿的渗透性，从而影响试样中不同部位氮气分压的变化，适当调整工艺参数，可以合成Ｓｉ３Ｎ４／Ｔｉ（Ｃ，Ｎ）／ＳｉＣ复相陶瓷，并从热力学角度对实验结果进行了合理的解释。
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| 关 键 词： | 燃烧合成 氮化硅 碳化硅 复合陶瓷 热力学 |
THERMODYNAMIC ANALYSIS ON COMBUSTION SYNTHESIS OF Si3N4/Ti(C,N)/SiC IN_SITU COMPOSITES |
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| Li Jiangtao,Ge Changchun.THERMODYNAMIC ANALYSIS ON COMBUSTION SYNTHESIS OF Si3N4/Ti(C,N)/SiC IN_SITU COMPOSITES[J].Journal of The Chinese Ceramic Society,1998,26(3):300-304. |
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| Authors: | Li Jiangtao Ge Changchun |
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| Abstract: | The combustion behavior of Si powder compacts with TiC as additive in pressurized nitrogen atmosphere was investigated.It is concluded that the amount of TiC added in the Si/Si 3N 4 powder compacts can significantly influence the phase composition of the combustion synthesized products.The variation of the nitrogen gas permeability of the specimen and therefore the variation of the local nitrogen partial pressure in different parts of the specimen during combustion process depend mainly on the TiC contents in the green compacts. In_situ combustion synthesis of Si 3N 4/Ti(C,N)/SiC composites was carried out through optimizing the processing parameters,besides,thermodynamic analysis result is in agreement with the experimental results. |
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| Keywords: | combustion synthesis in_situ reaction synthesis silicon nitride silicon carbide particulate reinforced ceramics |
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