尹恒虎,聂宝鑫,周细应,张国全,王塞北,顾文秀

• 1:上海工程技术大学材料科学与工程学院
• 2:贵研中希(上海)新材料科技有限公司
• 3:昆明贵金属研究所

摘要(Abstract)：

采用合金内氧化法制备了不同Te含量的Ag/SnO_2In_2O_3电接触材料，利用X射线衍射(XRD)、X射线光电子能谱(XPS)和光学显微镜(OM)分析了Ag/SnO_2In_2O_3微观组织，利用JF04C触点测试系统测试了铆钉型触点的电接触性能，分析了Ag/SnO_2In_2O_3电接触材料的转移损耗情况，并利用扫描电镜(SEM)对电接触材料动静触点电弧侵蚀形貌进行了分析，分析Te的添加对材料性能和燃弧机制的影响。结果表明：Te的添加有助于细化晶粒，并且随着Te含量增加，Ag/SnO_2In_2O_3材料形成了波浪状组织，Te的加入未对Ag、SnO_2和In_2O_3的存在形式造成影响，材料的相组成包括Ag、SnO_2、In_2O_3、TeO_2和单质Te。随着Te含量增加，材料的接触电阻呈现先上升后下降再上升的趋势，当Te的添加量为0.75%时，接触电阻最低且最稳定，熔焊力平均值为26.6 cN,低于常规模拟继电器30.6 cN的分断力。Te的添加改变了材料转移模式，减少了电弧侵蚀表面喷溅状侵蚀形貌的出现，当Te的添加量为0.75%时，电弧侵蚀表面产生的“猪网油”状的网状结构和“桑葚”状结构，对Ag/SnO_2In_2O_3材料在持续高频直流场合抗材料定向转移及抗熔焊性能方面改善显著，过量添加则会恶化触点性能。

关键词(KeyWords)： Ag/SnO_2In_2O_3;碲元素;电接触性能;电弧侵蚀;网状结构

Abstract:

Keywords:

基金项目(Foundation): 云南贵金属实验室科技计划项目(YPML-2022050223)

作者(Author): 尹恒虎,聂宝鑫,周细应,张国全,王塞北,顾文秀

DOI: 10.13289/j.issn.1009-6264.2023-0208

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