您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 5    October 2001

[PDF Download]    [Flash Online]

    

Self-propagating high-temperature
synthesis in Ti-W-C system
LI Jin-feng(李劲风)12,  ZHANG Zhao(张  昭)3
XU Xie-wen(徐协文)2, ZHENG Zi-qiao(郑子樵)2

1. College of Materials Science and Engineering,
Fuzhou University, Fuzhou  350002, P.R.China;
2. Department of Materials Science and Engineering,
Central South University,Changsha  410083, P.R.China;
3. Department of Chemistry, Zhejiang University, Hangzhou  310027, P.R.China

Abstract: The effects of W content and preheat temperature on combustion temperature, combustion velocity and product components of self-propagating high-temperature synthesis(SHS) in Ti-W-C system were investigated. The results show that with decreasing W content and increasing preheat temperature, the combustion temperature and combustion velocity increases, the SHS reaction becomes complete and the particle size of product increases. There exist two combustion mechanisms. When Ti powder in combustion front was molten by high combustion temperature, SHS product was formed by melt-solution-precipitation mechanism. When the combustion temperature was not high enough to make Ti powder melt in combustion front, the product was formed through diffusion-solution-in-solid-state.

 

Key words:  self-propagating high-temperature synthesis (SHS);  Ti-W-C system;  combustion mechanism

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn