摘要
研究了W-15wt%Cu电接触材料在直流条件电弧作用下电极表面元素分布、材料微观组织形貌;探讨了电接触材料在直流电弧作用下的转移和腐蚀机理。结果表明:直流电弧引起阳极表面熔化、Cu离子向阴极转移并在阴极表面沉积;金属氧化物在电弧高温作用下分解成单元素,吸收了电弧能,有利于灭弧;同时W颗粒悬浮在阳极Cu微小熔池中,增加了熔融Cu的粘度,有利于降低Cu熔滴的飞溅,减少了电弧烧损。W-15wt%Cu复合电接触材料显示出良好的综合电性能。
The element distribution in electrode surface, the microstructure and morphology of the W-15wt%Cu electric material were studied under DC condition. The transformation and erosion mechanism of the material in the DC arc was discussed. The results show that the DC arc causes the melting of the surface in anode, the transferring of copper ion and depositing on the cathode surface. The deposition of copper in cathode surface reduces the contact resistance. The decomposition of metal oxide is helpful to extinguish arc by absorbing the arc energy. Meanwhile the particles of W suspend in the melt pool which will increase the viscosity of the melt Cu and help to reduce the splash of melt drop and arc erosion. The W-15wt% Cu contact material shows better performance under DC condition compared to the other materials
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2012年第6期994-997,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51064016)
云南省教育厅科学研究基金(08Y0055)
昆明市科技计划重点项目资助(昆科计字08H130102)
