Cu改性Ti_5Si_3金属间化合物的制备与力学性能  

Preparation and mechanical properties of Ti_5Si_3 intermetallic compound modified by Cu

作　　者：方双全[1] 刘澄[1] 黄新[1] 严凯[1] 

机构地区：[1]扬州大学机械工程学院材料工程系,江苏扬州225127

出　　处：《金属热处理》2015年第11期21-24,共4页Heat Treatment of Metals

基　　金：国家高技术研究发展计划(863计划)(2013AA7024030);扬州大学科技创新培育基金项目(206020400)

摘　　要：采用真空热压方法原位合成了纯Ti5Si3和Cu改性Ti5Si3金属间化合物,利用X射线衍射和扫描电镜方法研究了金属间化合物的相组成和微观结构。测试了材料的抗弯强度和断裂韧度,分析和探讨了材料的强韧化机理。结果显示,Ti5Si3金属间化合物的抗弯强度和断裂韧度随Cu掺量的增加而显著增加,分析表明延性合金Cu Ti的生成、晶粒细化是Ti5Si3金属间化合物强韧化的主要原因。In-situ synthesis of Ti5Si3 intermetallic compound modified by Cu were prepared through vacuum hot pressing,and the phase composition and microstructure were investigated by XRD and SEM technologies.Bending strength and fracture toughness were tested,which markedly increased with the Cu doping content increasing.Moreover,strengthening and toughening mechanism was further analyzed and discussed.The investigation results indicate that the ductility alloy Cu Ti and grain refinement are the main causes of strengthening and toughening in Ti5Si3 intermetallic compound.

关 键 词：Ti5Si3金属间化合物 原位合成 强韧化 

分 类 号：TB33[一般工业技术—材料科学与工程]