成型工艺对Ag/SnO2电接触材料物理及力学性能的影响  

Influence of Forming Process on Physical and Mechanical Properties of Ag/SnO2 Electrical Contact Materials

作　　者：郑晓华 王贵葱 张玲洁 陈晓[4] 杨芳儿 ZHENG Xiaohua;WANG Guicong;ZHANG Lingjie;CHEN Xiao;YAN G Fang'er(School of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Zhejiang-Califomia International Nanotechnology Institute,Zhejiang University,Hangzhou 310058,China;School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China;Wenzhou Hongfeng Electrical Alloy Co.,Ltd.,Wenzhou 325603,China)

机构地区：[1]浙江工业大学材料科学与工程学院,浙江杭州310014 [2]浙江大学浙江加州国际纳米技术研究院,浙江杭州310058 [3]浙江大学材料科学与工程学院,浙江杭州310027 [4]温州宏丰电工合金股份有限公司,浙江温州325603

出　　处：《热加工工艺》2020年第14期75-78,共4页Hot Working Technology

基　　金：浙江省自然科学基金资助项目(LQ17E010002);浙江省科技计划资助项目(2017C01051)。

摘　　要：以化学共沉淀法合成的SnO2粉体为原料,采用机械合金化技术制备Ag/SnO2复合粉体,并采用不同工艺组合制成Ag/SnO2电接触材料,对工艺条件进行了优化,分析并对比了材料的物理及力学性能。结果表明:所制备的Ag/SnO2复合粉体由Ag、SnO2两相组成,不含其它杂相;相比单道次冷压、单道次热压以及冷压-冷压组合3种工艺,采用冷压-热压组合工艺制备的Ag/SnO2电接触材料在硬度、电导率以及相对密度方面具有明显优势,电阻率达到最低值2.43μΩ·cm,相对密度最高(97.78%),韧性最佳。The Ag/SnO2 composite powder was prepared by mechanical alloying technology using SnO2 powder synthesized by chemical coprecipitation method as raw material, and the electrical contact material of Ag/SnO2 was prepared by different process combination. The process conditions were optimized, and the physical and mechanical properties of the materials were analyzed and compared. The results show that, the prepared Ag/SnO2 composite powder is composed of two phases of Ag and Sn O2, without any other impurity phase. Compared with the materials prepared under single-pass cold pressing, single-pass hot pressing and cold pressing-cold pressing combination, the Ag/SnO2 electrical contact material prepared by cold pressing-hot pressing combination has obvious advantages in hardness, electrical conductivity and relative density. The resistivity reaches the minimum value of 2.43 μΩ·cm, the highest relative density is the highest(97.78%), and the toughness is the best.

关 键 词：AG/SNO2 电接触材料 机械合金化 烧结 微观组织 

分 类 号：TB333.12[一般工业技术—材料科学与工程] TG113.2[金属学及工艺—物理冶金]