Cu-W-TiC复合材料的电接触特性研究  

Study on Electrical Contact Properties of Cu-W-TiC Composite

作　　者：殷婷[1] 田保红[1,2] 张毅[1,2] 刘勇[1,2] 宋克兴[1,2] 

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]有色金属共性技术河南省协同创新中心,河南洛阳471023

出　　处：《热加工工艺》2016年第10期142-145,共4页Hot Working Technology

摘　　要：采用放电等离子烧结(SPS)工艺制备了(Cu/50W)-3%Ti C复合材料。测试了该复合材料的密度、致密度、显微硬度和导电率;采用扫描电镜分析了该复合材料的显微组织;利用JF04C型触点材料测试系统研究了该复合材料的熔焊力、接触电阻等电接触性能及其变化规律。结果表明:在本试验条件下,(Cu/50W)-3%Ti C复合材料触头的材料转移随电流的增大而增大,且材料的转移方向从阳极向阴极转移,其转移机制以液桥转移为主,同时伴有电弧转移;该复合材料的熔焊力随电流的增大而增大,且随操作次数的增加呈上升趋势;该复合材料的接触电阻随操作次数的变化较为平稳,随电流的增加,呈下降趋势。（Cu/50W）-3%TiC composite was prepared by spark plasma sintering （SPS） method. The density, relative density, microhardness and electrical conductivity of the composite were measured. The microstmcture of the composite was analyzed by SEM. The electrical contact properties and their change rules, such as the fusion welding resistance force and contact electrical resistance of the composite were researthed by model JF04C electrical contact test system. The results show that under test condition, the mass change of material transfer of （Cu/50W）-3%TiC composite increases with the electrical current increasing. The material transfer direction of the composite is from the anode to the cathode. The main material transfer mechanism of the composite is attributed to the liquid bridge transfer type accompanied by some electrical arc transfer. The fusion welding resistance forces of the composite increase with the electrical current increasing and increase with the operating times increasing. The contact electrical resistance of the composite is stable with operating times changing and it decreases with the test current increasing.

关 键 词：Cu-W-TiC 电接触 材料转移 熔焊力 接触电阻 

分 类 号：TB333[一般工业技术—材料科学与工程]