文献类型：期刊文献

英文题名：The effects of oxidation methods on microstructure and properties of Ag/ SnO2Bi2O3CuO materials

作者：Wu, Qiong Xu, Guofu Zhao, Chengwei Yuan, Xiaolu Huang, Runzhang Yu, Lejian Wu, Chunping

第一作者：Wu, Qiong;吴琴

通信作者：Xu, GF[1];Wu, CP[1];Xu, GF[2];Wu, CP[2]

机构：[1]Guizhou Inst Technol, Dept Mat & Energy Engn, Guiyang 550003, Peoples R China;[2]Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China;[3]Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China;corresponding author), Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China.

年份：2026

卷号：720

外文期刊名：APPLIED SURFACE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001631534500004)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 52477033) , Hunan Provincial Natural Science Foundation of China (No. 2025JJ50280) , Major Science and Technology Special Project of Guizhou Province (Qiankehe Rencai XKBF [2025] 008) , Guizhou Province High Level Innovative Talents (No. Qianke He Platform and Talent (2022) 011-2) and Guizhou Province Youth Science and Technology Talent Support Project.

语种：英文

外文关键词：Oxidation methods; Ag grain size; Physical properties

摘要：Ag/SnO2 has gained prominence in electrical contact materials due to its excellent resistance to arc erosion and fusion welding. This study clarifies how two oxidation methods (billet oxidation and powder pre-oxidation) under different oxidants (air and air + Ag2O) influence the microstructure and properties of Ag/SnO2Bi2O2-CuO materials. The results indicate that the materials oxidized in air using both methods exhibit a network-like microstructure, whereas those oxidized in air + Ag2O show an island-like microstructure. Notably, the most homogeneous microstructure is achieved through powder pre-oxidation in air + Ag2O, yielding the smallest average Ag grain size (2.69 mu m) and optimal physical properties. The corresponding materials exhibit superior physical properties, with a relative density of 98 %, a hardness of 70 HV, and an electrical conductivity of 41 MS/ m.