Cu/Ni_3Ti原位复合材料的显微组织和力学性能  

Microstructures and Mechanical Properties of Cu/Ni_3Ti Composites

作　　者：毛虎 杨宏亮 张正 姜江[2] 李永涛 史晓斌 MAO Hu;YANG Hongliang;ZHANG Zheng;JIANG Jiang;LI Yongtao;SHI Xiaobin(Anhui University of Technology,School of Materials Science ＆ Engineering,Maanshan 243032,China;Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials,Jiangxi Academy of Sciences,Nanchang 330029,China)

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243032 [2]江西省铜钨新材料重点实验室江西省科学院,江西南昌330029

出　　处：《有色金属材料与工程》2018年第4期10-15,20,共7页Nonferrous Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(51601001;51401096;51671001)

摘　　要：通过真空电弧熔炼法制备了Cu/Ni_3Ti原位复合材料。采用X射线衍射仪、扫描电子显微镜、显微硬度计和纳米压痕仪分别测试了Cu/Ni_3Ti原位复合材料的相组成、微观组织形貌、显微硬度和弹性模量。结果显示,Ni_3Ti相在铜基体中呈针状分布,且铸锭边缘与心部平均晶粒直径分别约为1.74和249μm。Cu/Ni_3Ti原位复合材料在时效温度为550℃时的强化效果最佳,此时铜基体与Ni_3Ti相的显微硬度最大值分别达到了174和209。在热处理后,Ni_3Ti相的最大硬度和弹性模量分别达到10.5 GPa和249.7 GPa,远高于Cu基体,Ni_3Ti相是一种理想的增强相。Cu/Ni3Ti in-situ composite is prepared by vacuum arc melting.The phase composition,microstructure morphology,microhardness and elastic modulus of the composite are measured by using X-ray diffractometer,scanning electron microscope,microhardness tester and nanoindentation,respectively.The results show that Ni3Ti phase is acicular in the Cu matrix.The average grain sizes at the edge and center of the ingot are about 1.74 and 249μm,respectively.The Cu/Ni3Ti in-situ composite have the highest strengthening effect after aging at 550 ℃.Meanwhile,the maximum microhardnesses of Cu matrix and Ni3Ti phase are up to 174 and 209,respectively.After heat treatment,the maximum hardness and elastic modulus of Ni3Ti phase measured by nanoindentation are 10.5 GPa and 249.7 GPa,respectively,which are much higher than those of Cu matrix.Therefore,Ni3Ti is an ideal strengthening phase.

关 键 词：原位复合材料 Ni3Ti相 显微硬度 增强相 

分 类 号：TG166.2[金属学及工艺—热处理]