School of Materials Science and Engineering;
Henan University of Science and Technology;
Luoyang 471023;
China;
Henan Academy of Sciences;
Zhengzhou 450000;
China;
Henan Key Laboratory of Advanced Conductor Materials;
Zhengzhou 450046;
China;
Provincial and Ministerial Co-construction of Collaborative Innovation Center of Nonferrous New Materials and Advanced Processing Technology;
Luoyang 471023;
China;
Center of Electron Microscopy and State Key Laboratory of Silicon Materials;
School of Materials Science and Engineering;
Zhejiang University;
Hangzhou 310027;
China;
College of Materials Science and Engineering;
Zhengzhou University;
Zhengzhou 450001;
China;
Grain boundary character; Embrittlement; Bi segregation; Atomic configuration; Ultrahigh-purity copper;