中文摘要：

运用触点材料测试系统进行了AgSnO2电接触材料在低压直流条件下的电接触实验，研究了材料转移情况，分析了电弧侵蚀形貌和成分变化。结果表明：AgSnO2（12）的转移方向为阴极向阳极转移，阴、阳极材料转移速率均为初期较快后逐渐减缓。阴、阳极表面可按电弧侵蚀形貌分成对应的三个圆环状区域：中心A区—电弧作用域，B区—电弧影响区，最外层区—电弧无明显影响区。阴极电弧作用区微观形貌主要为海绵状基体上分布着大小不一的孔洞，Sn 和 O 元素多偏聚在孔洞区域；阳极侵蚀区主要为熔融流动铺层或喷溅状态。

英文摘要：

Electrical contact experiment systems were used to analyze the material tester on AgSnO2 electrical contact materials under the DC load. The surface profiles and the microstructures of AgSnO2 were observed and measured by SEM and EDS after the test. The results reveals a trend of material transferring from cathode to anode on AgSnO2（12） contact materials. The surface of the cathode and anode canbe divided into three circular rings according to the arc erosion morphology. The microstructure of cathode is composed primarily of spongy matrix and the holes with different sizes distributed on it. Anode＇ morphology is composed primarily of molten flow layer and splash state