摘要
采用粉末冶金技术制备Ag/SnO_(2)、Ag/ZnO、Ag/Ni和Ag/W银基触点材料,系统研究了粉末冶金制备过程中压制力对不同类型银基触点材料物理和电接触性能的影响规律。结果表明:Ag/SnO_(2)和Ag/ZnO材料的相对密度随压制力的提高显著增加,而Ag/Ni和Ag/W合金类材料的相对密度则随压制力的提高下降趋势明显。当压制力达到600 MPa后,Ag/SnO_(2)材料的导电率从35.2%IACS提高到52.6%IACS。压制力对银基触点材料的电接触性能有很大影响,600 MPa条件下制备的Ag/SnO_(2)和Ag/ZnO材料表现出相对较低的燃弧能量和接触电阻。特别是Ag/ZnO材料的耐电弧侵蚀性能最优,而且接触电阻受压制力的影响小。尽管Ag/W合金的导电率高达93.0%IACS,但电弧侵蚀后阳极质量损失大,阴极表面粗糙并出现明显裂纹,接触电阻受压制力的影响大。相比之下,Ag/Ni合金的质量损失低,主要发生在阴极,且表现出较好的抗电弧侵蚀性能。
Ag/SnO_(2),Ag/ZnO,Ag/Ni,and Ag/W silver-based contact materials were prepared by powder metallurgy method.The effects of pressing force on the physical and electrical contact properties of the different silver-based contact materials were systematically studied.The results show that the relative density of the Ag/SnO_(2)and Ag/ZnO materials significantly increases with the increase of pressing force,while the relative density of the Ag/Ni and Ag/W alloys obviously decreases.When the pressing force reaches 600 MPa,the electrical conductivity of the Ag/SnO_(2)materials can be increased from 35.2%IACS to 52.6%IACS.The electrical contact properties of the silver-based contact materials are greatly affected by pressing force.The Ag/SnO_(2)and Ag/ZnO materials prepared under 600 MPa show the lower arc energy and contact resistance.Especially,the Ag/ZnO materials exhibit the best arc erosion resistance,and the contact resistance is less affected by pressing force.Although the conductivity of the Ag/W alloys is up to 93.0%IACS,the anode mass loss is great after arc erosion,the cathode surface is rough,the obvious cracks appear,and the contact resistance is greatly affected by the pressing force.In contrast,the mass loss of the Ag/Ni alloys is lower,which mainly occurs at the cathode,showing the better arc erosion resistance.
作者
韩鑫磊
范玉卓
梁滢雪
陈良玉
彭一洋
李桂景
HAN Xinlei;FAN Yuzhuo;LIANG Yingxue;CHEN Liangyu;PENG Yiyang;LI Guijing(Department of Engineering Mechanics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Provincial Collaborative Innovation Center of Mechanics of Intelligent Materials in Hebei,Shijiazhuang 050043,China;Hebei Key Laboratory of Mechanics of Intelligent Materials and Structures,Shijiazhuang 050043,China)
出处
《粉末冶金技术》
北大核心
2025年第1期42-51,共10页
Powder Metallurgy Technology
关键词
银基触点材料
粉末冶金
压制力
相对密度
接触电阻
燃弧能量
silver-based contact materials
powder metallurgy
pressing force
relative density
contact resistance
arc energy
作者简介
通讯作者:李桂景:E-mail:ligj@stdu.edu.cn。
