Self-propagating high-temperaturesynthesis in Ti-W-C system

来源期刊：中国有色金属学报(英文版)2001年第5期

论文作者：李劲风 张昭 徐协文 郑子樵

文章页码：733 - 737

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

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.