| 刚玉-氮化硅-碳化硅复合材料的性能研究 |
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| 引用本文： | 陈春霞,李勇,康华荣,夏文斌,岳月红.刚玉-氮化硅-碳化硅复合材料的性能研究[J].硅酸盐通报,2010,29(1):239-242. |
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| 作者姓名： | 陈春霞 李勇 康华荣 夏文斌 岳月红 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083;巩义通达中原耐火材料技术有限公司,巩义,451261 |
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| 摘 要： | 以棕刚玉、氮化硅和碳化硅为原料在氧化气氛下制成试样.将试样分别在1500 ℃、1550 ℃和1600 ℃保温5 h进行埋炭处理.利用XRD、SEM和EDS等检测方法,结合热力学分析,研究了氧化气氛烧成后试样的物相变化以及高温埋炭条件下Si_3N_4的稳定性.结果表明:氧化气氛烧成后生成一种莫来石固溶体Si_6Al_(10)O_(21)N_4;高温埋炭处理后Si_3N_4和Si_6Al_(10)O_(21)N_4会部分转化为SiC,Si_3N_4向SiC明显转化的温度大于1500 ℃,Si_6Al_(10)O_(21)N_4向SiC明显转化的温度大于1550 ℃.
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| 关 键 词： | Si_3N_4 SiC 相转化 |
Research on the Properties of Al_2O_3-Si_3N_4-SiC Composite |
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| CHEN Chun-xia,LI Yong,KANG Hua-rong,XIA Wen-bin,YUE Yue-hong.Research on the Properties of Al_2O_3-Si_3N_4-SiC Composite[J].Bulletin of the Chinese Ceramic Society,2010,29(1):239-242. |
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| Authors: | CHEN Chun-xia LI Yong KANG Hua-rong XIA Wen-bin YUE Yue-hong |
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| Affiliation: | 1.School of Materials Science and Engineering;University of Science and Technology Beijing;Beijing 100083;China;2.Gongyi Tongda Zhongyuan Refractory Co.;Ltd;Gongyi 451261;China |
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| Abstract: | Taking brown alumina, silicon nitride and carbon silicon as raw materials, the specimens were prepared under oxidization atmosphere. The specimens was embedded in carbon at temperatures of 1500 ℃,1550 ℃ and 1600 ℃ for 5 h respectively. The phase change of the specimens fired under oxidation atmosphere and the stability of Si_3N_4 under carbon-embedded were studied by XRD, SEM and EDS, combining with thermodynamic analysis.The results show that there is a mullite solid solution Si_6Al_(10)O_(21)N_4 created after fired under oxidation atmosphere.Si_3N_4 and Si_6Al_(10)O_(21)N_4 will transform to SiC partly after carbon-embedded, and the transition temperature of Si_3N_4 and Si_6Al_(10)O_(21)N_4 are above 1500 ℃ and 1550 ℃ respectively. |
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| Keywords: | Si3N4 SiC phase transition |
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