液相烧结碳化硅晶界内氮化反应的研究

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 364.

液相烧结碳化硅晶界内氮化反应的研究

叶玉汉¹, 何帮顺², 王存宽¹

1. 宁波大学化学系, 宁波 315211;
2. 华东理工大学化学系, 上海 200237

收稿日期:2001-04-29 出版日期:2002-03-24 发布日期:2002-03-24
通讯作者: 叶玉汉(1938年出生),男,教授,主要从事无机材料化学研究.E-mail:yhyecm@nbu.edu.cn E-mail:yhyecm@nbu.edu.cn
基金资助:
国家自然科学基金(批准号:20072022)资助

Studies on Nitrogenization Reaction in Liquid-phase Sintering of SiC Ceramic

YE Yu-Han¹, HE Bang-Shun², WANG Cun-Kuan¹

1. Department of Chemistry, Ningbo University, Ningbo 315211, China;
2. Department of Chemistry, East China University of Science & Technology, Shanghai 200237, China

Received:2001-04-29 Online:2002-03-24 Published:2002-03-24

摘要/Abstract

关键词: 碳化硅, 氮化反应, 纳米尺寸微晶, 液相烧结

Abstract: SiC ceramic was sintered through liquid phase by using SiO₂ as the sintering additive. Mixed NO₂ and CO gas was used as the sintering atmosphere. The microstructure of the densified SiC ceramic was observed by using transmission electron microscopy(TEM), Bar-like ting crystal was found to distribute in the intergranular phase. The crystal was identified by spatially-resolved electron energy-loss spectroscopy(EELS) to be SiO₂NO₂O. It is suggested that nitrogen, coming from the sintering atmosphere, attends the chemical reaction in SiC ceramic at sintering temperature and is responsible for the appearance of the SiO₂NO₂O crystalline.

Key words: SiC, Nitrogenization, Microcrystal with nanometer scale, Liquid-phase sintering

中图分类号:

O611

TrendMD:

叶玉汉, 何帮顺, 王存宽. 液相烧结碳化硅晶界内氮化反应的研究. 高等学校化学学报, 2002, 23(3): 364.

YE Yu-Han, HE Bang-Shun, WANG Cun-Kuan . Studies on Nitrogenization Reaction in Liquid-phase Sintering of SiC Ceramic. Chem. J. Chinese Universities, 2002, 23(3): 364.