不同颗粒增强铜基复合材料的真空电击穿性能  

Vacuum electrical breakdown property of copper matrix composites reinforced by different particles

作　　者：刘勇[1,2] 耿昊[3] 李国辉[1] 田保红[1,2] 顾正彬 张毅[1,2] LIU Yong;GENG Hao;LI Guo-hui;TIAN Bao-hong;GU Zheng-bin;ZHANG Yi(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology,Luoyang 471023,China;The 713th Research Institute of China Shipbuilding Industry Corporation,Zhengzhou 450015,China;Department of Materials Science and Engineering,Nanjing University,Nanjing 210093,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023 [3]中国船舶重工集团公司第七一三研究所,河南郑州450015 [4]南京大学材料科学与工程系,江苏南京210093

出　　处：《材料热处理学报》2018年第8期1-6,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(U201704143);河南省科技开放合作项目(182106000018)

摘　　要：采用粉末冶金法制备Al2O3/Cu和Cr30/Cu复合材料,采用熔渗法制备W80/Cu（-Al2O3）复合材料,观察其微观组织,测试其真空电击穿性能。结果表明：Al2O3/Cu和Cr30/Cu复合材料有较低的截流值,Cr30/Cu复合材料有较高的耐电压强度,且燃弧时间更加稳定;在W80/Cu复合材料中引入Al2O3强化粒子能提高其耐电压强度,降低截流值;Al2O3/Cu和Cr30/Cu复合材料电弧烧蚀区域均匀分散,而W/Cu复合材料电弧侵蚀集中,侵蚀坑较深,但能减弱熔融金属喷溅;Cr30/Cu复合材料抗真空电击穿性能最优。Al2O3/Cu and Cr30/Cu composites were prepared by powder metallurgy,and W80/Cu（-Al2O3） composites were prepared by infiltration method,respectively,and microstructure of the composites was observed and their vacuum electric breakdown properties were tested. The results show that the Al2O3/Cu and Cr30/Cu composites have low chopping current,and the Cr30/Cu composite has high breakdown strength and stable arc duration. The addition of Al2O3 particles in the W80/Cu composite can improve breakdown strength and reduce chopping current. The arc erosion zones are uniform and dispersive on the surfaces of the Al2O3/Cu and Cr30/Cu composites,and the arc erosion in the W80/Cu composites is concentrated and the erosion pits are deep,which can weaken the molten metal splash. It turns out that the Cr30/Cu composite has the optimal electrical breakdown resistance.

关 键 词：真空电击穿 铜基复合材料 燃弧时间 截流值 耐电压强度 

分 类 号：TB331[一般工业技术—材料科学与工程] TG146.1[金属学及工艺—金属材料]