摘要
以钛粉、铁粉和炭黑为原料,原位反应合成了TiC/铁基复合材料;用扫描电镜、X射线衍射仪对其进行了组织分析,用热分析法对铁-钛-碳体系原位合成的反应机理进行研究,用MM-200型磨损试验机研究了该复合材料的耐磨性能。结果表明:复合材料相组成为TiC和-αFe,生成的硬质相TiC颗粒细小,在铁基体中均匀分布;铁-钛-碳的反应机理为,首先在765.6℃发生铁的同素异构转变,即-αFe→γ-Fe,其次在1 078.4℃钛与铁共熔而形成低共熔体Fe2Ti,最后碳与Fe2Ti在1 138.2℃反应生成TiC;在重载干滑动条件下,该复合材料显示了良好的耐磨性能。
TiC/Fe matrix composite was in situ synthesized by sintering compacts of mixed iron,titanium and carbon black powders.The microstructure of composite was investigated using X-ray diffraction and scanning electron microscopy.With the help of differential thermal analysis,the reaction mechanism of the Fe-Ti-C system was discussed.The wear-resistance of TiC/Fe matrix composite was examined using an MM-200 wear test machine.The results show that the synthesized composite consistes of TiC and α-Fe.TiC particles ...
出处
《机械工程材料》
CAS
CSCD
北大核心
2008年第5期41-44,共4页
Materials For Mechanical Engineering
