摘要
采用燃烧波峰铜楔块淬熄法和热分析法，研究Ｔｉ－Ｃ－Ｆｅ体系自蔓延高温合成的反应动力学过程和结构形成过程。在该体系ＳＨＳ过程中，首先形成Ｆｅ、Ｔｉ低共熔体，Ｃ在高温下溶解于熔体之中，进而形成富Ｔｉ的ＴｉＣｘ。在主波峰后Ｃ继续通过扩散与ＴｉＣｘ反应形成接近化学计量比的ＴｉＣ。熔融金属的流动导致大团聚体形成，在团聚体内反应形成小颗粒ＴｉＣ，在燃烧波过后的持续高温阶段。
The reaction dynamic process and structure forming process in SHS of TiCFe system were studied using Combustion Front Quenching method and heat analysis method. It was found in the SHS process of the system that Fe2Ti comolten body was formed first, then carbon dissolved to it in high temperature and reacted with it to form TiCx with higher Ti content. After the main reaction carbon continued to react with TiCx through diffusion and formed the titanium carbide with a close stoichiometric ratio. The flow of molten metals resulted in agglomerates in the preheating zone. In the agglomerates small TiC particles were formed. In the period with high temperature after combustion wave the TiC particles continued growing to a larger size.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1999年第3期78-82,92,共6页
Acta Materiae Compositae Sinica
基金
国家自然科学基金
国家863高技术项目
关键词
SHS
反应动力学
金属陶瓷
钛碳铁体系
TiCFe system, SHS, reaction dynamics, microstructure, process
