Effect of cerium on microstructure,texture and properties of ultrahigh-purity copper  

作　　者：Yunxiao Hua Haitao Liu Kexing Song Jiangwei Wang Yin'gang Guo Jing Tian Huiwen Guo 

机构地区：[1]Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology,School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang,471023,China [2]Henan Academy of Sciences,Zhengzhou,450000,China [3]Center of Electron Microscopy and State Key Laboratory of Silicon Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou,310027,China [4]Henan Zhongyuan Gold Smelter Co.,Ltd.,Sanmenxia,472100,China [5]Chinalco Luoyang Copper Processing Co.,Ltd.,Luoyang,471039,China

出　　处：《Journal of Rare Earths》2024年第1期220-227,I0008,共9页稀土学报（英文版）

基　　金：Project supported by the Henan Province Science and Technology Tackling Key Problems Project(222102230001);the Henan Province Young Talent Lifting Engineering Project(2021HYTP018);the Central Plain Scholar Workstation Project(224400510025);the National Natural Science Foundation of China(52071133,51904090 and 52071284)。

摘　　要：The effects of Ce addition(310 ppm and 1500 ppm)on the microstructure,texture and properties of ultrahigh-purity copper(99.99999%)were systematically studied using scanning electron microscopy(SEM),transmission electron microscopy(TEM)and electron backscattered diffraction(EBSD)analyses,combined with the microhardness and conductivity tests.Regarding the microstructure of the as-cast and as-extruded samples,the addition of Ce refines the grain size of the ultrahigh-purity copper and the refinement effect of 310Ce alloy is greater than that of 1500Ce alloy.This is due to the stronger compone nt supercooling and the accele rated recrystallization caused by lower Ce co ntent.In addition,Ce can react with Cu to form the Cu-Ce eutectic phases,which are deformable during the hot deformation.Furthermore,the added Ce can weaken the texture,showing a variation of brass recrystallization(BR),rotated cube,copper and S texture components,which depends on the recrystallization,the particle stimulated nucleation(PSN)as well as the stacking fault energy(SFE).Most remarkably,the introduction of Ce enhances the hardness of the ultrahigh-purity copper without obviously reducing its conductivity.The major{111}orientations and the stress distributions are responsible for such a superior conductivity of the Ce-containing alloys.

关 键 词：Ce addition Grain refinement TEXTURE Conductivity Ultrahigh-purity copper Rare earths 

分 类 号：TG146.11[一般工业技术—材料科学与工程]