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| Fe包覆Si3N4金属陶瓷相反应热力学分析 | |
| 引用本文： | 银锐明,钟定铭,范景莲,刘勋,王刘功. Fe包覆Si3N4金属陶瓷相反应热力学分析[J]. 中南大学学报(自然科学版), 2012, 43(2): 483-488 |
| 作者姓名： | 银锐明 钟定铭 范景莲 刘勋 王刘功 |
| 作者单位： | 1. 湖南工业大学冶金工程学院,湖南株洲,412008;中南大学粉末冶金国家重点实验室,湖南长沙,410083 2. 湖南工业大学冶金工程学院,湖南株洲,412008 3. 中南大学粉末冶金国家重点实验室,湖南长沙,410083 |
| 基金项目： | 国家自然科学青年基金资助项目(50804016);湖南省教育厅科研项目(02C659);长沙科技计划重点项目(K1005168-11) |
| 摘 要： | 研究非均相沉淀-热还原法制备Fe包覆α-Si3N4复合粉末常压烧结界面反应特性,并进行热力学分析.研究结果表明:在1 600℃下烧结时,α-Si3N4部分转变为β-Si3N4,Fe相消失,转而生成FeSi化合物;在1700℃下烧结时,α-Si3N4基本转变为β-Si3N4,FeSi化合物消失,Fe相重新出现；在烧结过程中,FeSi化合物或Fe晶粒发生明显长大,呈圆球状分布在Si3N4晶粒之间,实验结果可通过热力学分析进行解释. |
| 关 键 词： | 液相沉淀-热还原法 氮化硅 界面反应 热力学分析 |
Thermodynamic analysis of phase reaction of Fe coating Si3N4 cermet |
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| YIN Rui-ming , ZHONG Ding-ming , FAN Jing-lian , LIU Xun , WANG Liu-gong. Thermodynamic analysis of phase reaction of Fe coating Si3N4 cermet[J]. Journal of Central South University:Science and Technology, 2012, 43(2): 483-488 | |
| Authors: | YIN Rui-ming ZHONG Ding-ming FAN Jing-lian LIU Xun WANG Liu-gong |
| Affiliation: | 1 (1.College of Metallurgical Engineering,Hunan University of Technology,Zhuzhou 412008,China; 2.State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China) |
| Abstract: | The interfacial reaction characteristics of pressure sintering of Fe coating α-Si3N4 prepared by heterogeneous precipitation-thermal reduction method was studied,and the thermodynamic analysis was carried out.The results show that when the sintering temperature is 1 600 ℃,parts of α-Si3N4 turns to β-Si3N4,and Fe phase disappears and turns into FeSi compounds;When the sintering temperature is 1 700 ℃,most α-Si3N4 changes into β-Si3N4,and FeSi compounds disappear and Fe phase reappears.During the sintering process,FeSi compounds and Fe grains distributed between the Si3N4 grains obviously grow up.The experimental results can be explained by the thermodynamic analysis. |
| Keywords: | heterogeneous precipitation-thermal reduction Si3N4 interfacial reaction thermodynamic analysis |
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