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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。
Ag-SnO 2 contact materials with different content of SnO 2 were prepared by powder metallurgy method and the influence of SnO 2 content on the arc erosion behavior of Ag-SnO 2 contact materials was studied. The arc erosion morphology of Ag-SnO 2 contact materials was characterized by scanning electron microscopy (SEM), and the factors affecting the arc erosion of Ag-SnO 2 contact materials were analyzed. The results show that erosion takes place preferentially in the SnO 2 region during arc erosion. With the increase of SnO 2 content, the arcing time increases in turn, the erosion area decreases gradually, the erosion pits become deeper and the metal splash increases.