多相强韧化MoSi_2基复合材料的制备及性能  

Preparation and Performance of MoSi_2 Based Composites Reinforced by Multi-phases

作　　者：徐金富[1] 陈胜[2] 吴海飞[2] 文小浩[2] 

机构地区：[1]宁波工程学院材料工艺研究所,浙江宁波315016 [2]华东理工大学材料科学与工程学院,上海200237

出　　处：《机械工程材料》2008年第12期72-75,共4页Materials For Mechanical Engineering

摘　　要：采用热压烧结技术制备了含有多种强韧相的MoSi2基复合材料,研究了强韧相的数量和含量对复合材料性能的影响;探讨了多相强韧化MoSi2基复合材料的强韧化机理。结果表明:多相强韧的MoSi2基复合材料性能要好于单相强韧的复合材料,而两相强韧复合材料性能要优于三相强韧的;两相强韧的(5%SiC+5%Nb)复合材料综合性能较优;多相复合材料的强化机理主要为各强韧相的细晶强化和弥散强化的复合作用;韧化效应可能是各强韧相的相变韧化、微裂纹、裂纹偏转以及细化晶粒等机制的综合作用结果。MoSi2 based composites reinforced by multi-phases were prepared by the hot pressure sintering technique.Influence of the multi-phases number and content on the mechanical properties of the composites were studied,and strengthening and toughening mechanism was investigated.The results indicate that properties of the composites reinforced by multi-phases are better than those reinforced by single phase,those reinforced by two phases are better than those reinforced by three phases,and 5%SiC+5%Nb+MoSi2 compos...

关 键 词：热压烧结 MOSI2基复合材料 多相 强韧化 

分 类 号：TB33[一般工业技术—材料科学与工程]