CuW70合金真空电弧特性研究(英文)  

Vacuum Arc Characteristics of CuW70 Alloy

作　　者：曹伟产[1] 梁淑华[1] 高壮峰[1] 王献辉[1] 杨晓红[1] 

机构地区：[1]西安理工大学,陕西西安710048

出　　处：《稀有金属材料与工程》2011年第4期571-574,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50834003),National Natural Science Foundation of China(50871085);National High-Tech Research and Development Program of China(2009AA03Z522);the Foundation of Excellent Doctor Thesis of Xi'an University of Technology

摘　　要：以不同粒度的W粉为原料,采用熔渗法制备CuW70合金,在真空灭弧室模拟电烧蚀实验,通过高速摄影仪和扫描电镜研究CuW70合金表面阴极斑点运动规律。研究结果表明:W粉粒度较小的CuW70合金具有较高的耐电压强度、较长的燃弧时间和低的截留值。W粉粒度较大的CuW70合金真空阴极斑点运动表现为在阳极正下方反复地重复燃烧,并且以选择Cu相击穿为主,烧蚀坑较深;W粉粒度较小的CuW70合金表面阴极斑点在阳极下方出现分裂和偏移,击穿相分布于整个阴极表面。The fine-grained and coarse-grained CuW70 alloys were prepared by sintering and infiltrating. The motion of cathode spots was observed by a digital high speed video camera and a scanning electron microscope （SEM）. The results show that the fine-grained CuW70 alloy has larger breakdown strength, longer average arc life and lower chopping current. For coarse-grained CuW70 alloy, the cathode spots ignite and extinguish alternately beneath the anode, the breakdown is mainly located on copper phase, and the erosion pits are much deeper. However, the cathode spots of fine-grained CuW70 alloys have the characteristics of division and deviation, with the uniform distribution of the erosion pits on the entire cathode surface.

关 键 词：CuW70合金 阴极斑点 真空电弧 组织 

分 类 号：TG456.9[金属学及工艺—焊接]