中文摘要：

采用粉末冶金法制备了不同SnO_2含量的Ag-SnO_2触头材料,研究了SnO_2含量对Ag-SnO_2触头材料电弧侵蚀行为的影响。使用扫描电子显微镜（SEM）表征了Ag-SnO_2触头材料电弧侵蚀形貌,对影响Ag-SnO_2触头材料电弧侵蚀的因素进行了分析。结果表明,在电弧侵蚀过程中侵蚀优先发生在SnO_2区域。随SnO_2含量增多,燃弧时间依次增加,侵蚀面积逐渐减小,侵蚀坑变深,金属喷溅增强。

英文摘要：

Ag-SnO_2 contact materials with different SnO_2 contents were prepared by powder metallurgy,and the effect of SnO_2 content on the arc erosion behavior of the materials was studied.The erosion surface morphology of Ag-SnO_2 contact materials were characterized by scanning electron microscope,and the factors influencing arc erosion were analyzed as well.The results show that the arc erosion prefers to occur on SnO_2 particles.With the SnO_2 content increasing,the arcing duration extends,the erosion area decreases and the erosion pits deepens,resulting in an obvious molten metal splash.