(1. 中南大学 材料科学与工程学院，长沙410083；
2. 中南大学 有色金属材料科学与工程教育部重点实验室，长沙 410083)
摘 要: 通过电弧侵蚀模拟实验、三维轮廓仪(3DOP)和扫描电镜(SEM)等，研究操作次数对Ag/ZnO电触头电弧侵蚀行为的影响。结果表明：不同操作次数下，Ag/ZnO电触头电弧能量概率分布与电弧时间概率分布相似，电弧能量平均值与电弧时间平均值变化趋势一致。当操作次数为10000次时，Ag/ZnO电触头的电弧能量、电弧时间、温度变化、质量变化均最大，而电阻率变化最小。随着操作次数的增加，Ag/ZnO电触头表面形貌变化越来越大；相同操作次数下，阳极电触头表面形貌变化比阴极大。在电弧作用下，Ag/ZnO电触头主要发生喷溅侵蚀，并在触头表面观察到热水袋状、甜甜圈状、丝状等不常见典型电弧侵蚀形貌特征。
关键字: Ag/ZnO电触头；操作次数；电弧侵蚀
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Nonferrous Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410083, China）
Abstract:The influence of operation numbers on arc erosion behavior of Ag/ZnO electrical contact material was studied by arc erosion simulation experiment, three-dimensional profilometer (3DOP) and scanning electron microscope (SEM), etc. The results show that the probability distribution of arc energy of Ag/ZnO electrical contact material is similar to that of arc time under different operation times, and the change trend of arc energy average value is consistent with that of arc time average value. When the operation number is 10000, the arc energy, arc time, temperature change, mass change of Ag/ZnO electrical contact material are the largest, and the resistivity change is the smallest. With the increase of operation numbers, the change of surface morphology of Ag/ZnO electrical contact material is more and more serious. Under the same operation numbers, the change of surface morphology on the anode more serious than that on the cathode. Under the action of arc erosion, Ag/ZnO electric contact material was mainly eroded by splashing, and the shape of hot-water bag, doughnut, filamentous and other atypical arc erosion topography is observed on the surface of Ag/ZnO electric contact material.
Key words: Ag/ZnO electrical contact material; operation numbers; arc erosion
