Te含量对Ag/SnO2In2O3电接触材料组织及电接触性能的影响
Effect of Te content on microstructure and electrical contact properties of Ag/SnO2In2O3 electrical contact materials
尹恒虎 1聂宝鑫 2周细应 1张国全 2王塞北 3顾文秀1
作者信息
- 1. 上海工程技术大学材料科学与工程学院,上海 201620
- 2. 贵研中希(上海)新材料科技有限公司,上海 201603
- 3. 昆明贵金属研究所,云南昆明 650032
- 折叠
摘要
采用合金内氧化法制备了不同Te含量的Ag/SnO2In2O3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/SnO2In2O3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/SnO2In2O3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/SnO2In2O3材料形成了波浪状组织,Te的加入未对Ag、SnO2和In2O3的存在形式造成影响,材料的相组成包括Ag、SnO2、In2O3、TeO2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/SnO2In2O3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.
Abstract
Ag/SnO2In2O3 electrical contact materials with different Te contents were prepared by alloy melting-internal oxidation method.Microstructure of the Ag/SnO2In2O3 was analyzed using X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS)and optical microscope(OM).The electrical contact performance of rivet type contacts was tested using the JF04C contact testing system,and the transfer loss of the Ag/SnO2In2O3 electrical contact materials was analyzed.The arc erosion morphology of the dynamic and static contacts of electrical contact materials was analyzed by scanning electron microscopy(SEM),and the effect of Te addition on properties and arc burning mechanism of the materials was analyzed.The results show that the addition of Te helps to refine the grains,and as the Te content increases,the Ag/SnO2In2O3 materials form a wavy structure.The addition of Te does not affect the existing forms of Ag,SnO2 and In2O3,and the phase composition of the materials includes Ag,SnO2,In2O3,TeO2 and elemental Te.As the Te content increases,the contact resistance of the materials shows a trend of first increasing,then decreasing,and then increasing.When the Te content is 0.75％,the contact resistance is the lowest and most stable,with an average welding force of 26.6 cN,which is lower than the breaking force of 30.6 cN in conventional analog relays.The addition of Te changes the material transfer mode and reduces the appearance of splashy erosion morphology on the arc erosion surface.When the Te content is 0.75％,the"pig net oil"like network structure and"mulberry"like structure generated on the arc erosion surface significantly improve the directional transfer resistance and fusion welding resistance of the Ag/SnO2In2O3 materials in continuous high-frequency DC conditions,but excessive addition will deteriorate the contact performance.
关键词
Ag/SnO2In2O3/碲元素/电接触性能/电弧侵蚀/网状结构Key words
Ag/SnO2In2O3/tellurium element/electrical contact property/arc erosion/reticulation引用本文复制引用
基金项目
云南贵金属实验室科技计划项目(YPML-2022050223)
出版年
2024
NETL
NSTL
万方数据