摘要
借助金相显微镜、扫描电子显微镜、能谱仪、透射电镜、X射线衍射仪及涡流电导率仪、硬度仪研究了真空感应制备的Cu-Y合金的组织和性能。实验结果表明,Cu-Y合金的组织随着Y含量的增大而不断细化,未固溶的Y元素在Cu中以中间相化合物六方Cu7Y的形式富集在晶界处,退火后Cu7Y相会分解为立方Cu5Y相。Cu-Y合金的导电率随Y含量的增加会先上升再降低,当Y含量为0.05%时导电率达到最大102%IACS。而显微硬度随着Y含量的增加而不断升高,主要硬化机制为细晶硬化和第二相硬化。
Cu-Y alloys with different amount of Y were prepared by vacuum induction melting to study the effect of Y on the microstructure and properties of Cu alloys and determine the additive amount of Y. The microstructure observation and property test were conducted on Cu-Y alloys. The results show that the grains of Cu-Y alloys are refined by adding yttrium elements. Most of the yttrium atoms segregate at the grain boundary with the form of the intermetallic compound Cu7 Y. The hexagonal Cu7 Y is decomposed into cubic Cu5 Y and Cu after annealing treatment. The electrical conductivity of Cu-Y alloys rises first and then declines with the increasement of yttrium,the maximum value is 102%IACS when adding 0. 05% yttrium. The microhardness of Cu-Y alloys increases continually with the increasement of yttrium,which may be contributed to the grainboundary and intermediate phase hardening.
作者
卓海鸥
叶楠
刘文胜
唐建成
张金祥
ZHUO Hai-ou;YE Nan;LIU Wen-sheng;TANG Jian-cheng;ZHANG Jin-xiang(Department of Material Research,Ganzhou Nonferrous Metallurgy Research Institute,Ganzhou 341000,China;Powder Metallurgy Research Institute,Central South University,Changsha 410083,China;School of Materials Science and Engineering,Nanchang University,Nanchang 330031,China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2018年第6期40-47,共8页
Chinese Rare Earths
基金
国家自然科学基金项目(51364036,51471083)
江西省博士后科研择优资助项目(2016KY11)
关键词
稀土
Cu-Y合金
显微组织
中间化合物
rare earth
Cu-Y alloys
microstructure
intermetallic compound
作者简介
卓海鸥(1988-),男,江苏徐州人,博士,主要从事新型有色金属及合金的研究;唐建成,通讯联系人(E-mail: tangjiancheng@ncu.edu.cn)
