不同SnO2含量的AgSnO2触头材料电弧侵蚀行为研究

Investigation on the arc erosion behavior of AgSnO2 contact materials with different SnO2 contents

摘要:

采用粉末冶金法制备了不同SnO2含量的AgSnO2触头材料，研究了SnO2含量对AgSnO2触头材料电弧侵蚀行为的影响。采用扫描电子显微镜（SEM）表征了AgSnO2触头材料电弧侵蚀形貌,对影响AgSnO2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SnO2区域。随SnO2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。

Abstract:

AgSnO2 contact materials with different SnO2 contents were prepared by powder metallurgy,and the effect of SnO2 content on the arc behavior of AgSnO2 contact materials was studied.The erosion surface morphology of AgSnO2 contact materials were characterized by scanning electron microscope,and the factors which affect arc erosion were discussed as well.The results shows that the arc erosion prefer to occur on SnO2 particles.The increased SnO2 content decreases the erosion area and deepens the erosion pits significantly,and,thus,has an obvious molten metal splash.