龚伟,王一三,王静,李华

• 1:西南科技大学制造科学与工程学院
• 2:四川大学制造科学与工程学院
• 3:成都电子机械高等专科学校
• 4:西南科技大学国防科技学院 四川绵阳621010

摘要(Abstract)：

以钛粉、铁粉、钒铁粉、铬铁粉、钼铁粉及石墨粉为原料,通过原位烧结制备了(Ti,V)C/Fe复合材料。利用X射线衍射(XRD)、扫描电镜(SEM)和能谱EDS分析了材料的组织结构。结合差示扫描量热法分析(DSC)和高温X射线衍射分析研究了Fe-Ti-V-C体系原位烧结的动力学过程。结果表明:(Ti,V)C/Fe复合材料致密化程度高。增强相(Ti,V)C的形态比TiC更规则,TiC颗粒中存在富Mo的"环形结构",而(Ti,V)C中没有"环形结构"。合成(Ti,V)C/Fe复合材料的动力学过程为:在770℃左右发生钒的碳化反应生成VC,1140.4℃时发生Ti的碳化反应生成TiC,随着温度升高,VC和TiC发生固溶反应形成(Ti,V)C固溶体。在1400℃烧结时,硬质相(Ti,V)C(或TiC)在液相中根据Gibbs-Thomson效应,按照小颗粒不断溶解,大颗粒相应粗化的模式长大。

关键词(KeyWords)： 原位烧结;复合材料;(Ti,V)C;组织结构;生成机理

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 龚伟,王一三,王静,李华

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