摘要
采用真空烧结和内氧化法制备了Al2O3-Cu/25W10Mo4Cr复合材料,研究了其硬度、导电率、密度等综合性能和电接触性能。利用JF04C电接触触点测试系统测试了复合材料的熔焊力、燃弧时间、质量转移等电接触性能参数;利用JMS-5610LV扫描电镜对电接触试验后复合材料的表面进行微观形貌分析。结果表明:电压为DC 25 V时,Al2O3-Cu/25W10Mo4Cr复合材料的燃弧时间、燃弧能量随负载电流的增大而增大;接触电阻随负载电流的增大而减小;电接触后触点材料表面有气孔、裂纹、凹坑等典型电弧侵蚀特征。
Al2O3-Cu/25 W10 Mo4 Cr composites were prepared by vacuum sintering and internal oxidation,and its hardness,conductivity and density were studied.The electrical contact performance parameters such as welding force,arc time and mass transfer of the composites were tested by the JF04 C electrical contact test system.The surface morphology of the composites after electrical contact test was analyzed by using the JMS-5610 LV scanning electron microscopy.The results show that when the voltage is DC 25 V,the arc time and arc energy of the Al2O3-Cu/25 W10 Mo4 Cr composites increases with the increase of the load current,the contact resistance decreases with the increase of the load current,and the surface of the composites after electrical contact has typical arc erosion characteristics such as pores,cracks,pits and the like.
作者
薛慧慧
田保红
张晓辉
刘勇
张毅
XUE Hui-hui;TIAN Bao-hong;ZHANG Xiao-hui;LIU Yong;ZHANG Yi(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Pressing Technology,Luoyang 471023,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2020年第2期1-7,共7页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(U1704143)
河南省科技开放合作项目(182106000018)。
