W80/Cu-Al_2O_3复合材料的耐电弧侵蚀性能

采用粉末冶金和熔渗法制备W80/Cu-Al_2O_3复合材料,测试其密度、硬度和导电率,探究Al_2O_3对W80/Cu复合材料耐电弧侵蚀性能的影响。结果表明,添加Al_2O_3对复合材料的致密度和导电率影响不大,硬度有所增加;W80/Cu和W80/Cu-Al_2O_3复合材料在不同电流条件下燃弧时间和燃弧能量基本相同,但W80/Cu-Al_2O_3复合材料的稳定性更高;在30 V、30 A条件下,W80/Cu复合材料在电弧侵蚀过程中发生材料从阴极向阳极转移,加入Al_2O_3增强相后,材料的转移方向为阳极向阴极转移,且材料损耗量降低,喷溅现象减少,电弧侵蚀后触头表面更加平整。

Arc Erosion Resistance of WS0/Cu-Al2O3 Composites

The W80/Cu-Al2O3 composites were prepared by powder metallurgy and infiltrating method and,the density,hardness and electrical conductivity of composite were tested.The effect of Al2O3 on arc erosion resistance of W80/Cu-Al2O3 composites was investigated.The results showed that the addition of Al2O3 could improve the hardness of the composites and had litde effect on the density and electrical conductivity.W80/Cu and W80/Cu-Al2O3 composites showed little difference in arc duration and arc energy under different current conditions,but the stability of W80/Cu-Al2O3 composites was higher.The electric current was 30 A and the voltage 30 V,W80/Cu composite material transferred from cathode to anode in the process of the arc erosion,while W80/Cu-Al2O3 material transferred from the anode to cathode.With the addition of Al2O3,the loss of the material and the splashing decreased,and the surface of the composite became smoother after arc erosion.