银基合金滑环真空载流摩擦特性  

Friction properties of silver-based alloy slip rings under vacuum current-carrying

作　　者：张淑敏 刘兰英 于义德 王宇鹏 刘帅 刘清凯 ZHANG Shumin;LIU Lanying;YU Yide;WANG Yupeng;LIU Shuai;LIU Qingkai(Beijing Key Laboratory of Long-Life Technology of Precise Rotation and Transmission Mechanisms,Beijing Institute of Control Engineering,Beijing 100094,China)

机构地区：[1]北京控制工程研究所精密转动和传动机构长寿命技术北京市重点实验室,北京100094

出　　处：《粉末冶金材料科学与工程》2025年第1期51-59,共9页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(52305178)。

摘　　要：为优化银基滑环摩擦副选材,本研究选取AgCu合金、AgCuNi合金和Ag基复合材料作为环体材料,将其与Ag基、Au基刷丝组成摩擦副,进行真空载流寿命实验,采用示波记录仪、数码显微系统、扫描电子显微镜等研究不同摩擦副的电接触性能、磨损表面形貌、磨屑形貌及成分。结果表明:AgCu合金、AgCuNi合金与Ag基、Au基刷丝对磨后均会产生细长丝状的磨屑,其形貌多呈层状挤压特征。在Ag合金环体中引入WS_(2)、MoS_(2)二维材料可以改变磨屑形态,形成灰黑色细小薄片状磨屑,从而在材料源头避免了丝状磨屑的产生,有效降低磨屑引发的滑环短路风险。To optimize the material selection for the friction pair of silver-based slip rings,this study selected AgCu alloy,AgCuNi alloy,and Ag-based composite as the ring body materials.These materials were paired with Ag-based and Au-based brush wires to form friction pairs for vacuum current-carrying life experiments.Oscilloscope recorder,digital microscope system,and scanning electron microscope were used to study the electrical contact performance,wear surface morphology,debris morphology and composition of different friction pairs.The results show that AgCu alloy and AgCuNi alloy,when grinding against Ag-based and Au-based brush wires,produce elongated filamentous debris with a layered extrusion morphology.Introducing WS_(2) and MoS_(2) two-dimensional materials into the Ag alloy ring can change the debris morphology,forming gray-black fine flake-like debris,thus avoiding the generation of filamentous debris at the source of the materials and effectively reducing the risk of slip ring short circuits caused by debris.

关 键 词：银基合金 滑环 复合材料 载流摩擦 磨屑形貌 

分 类 号：TG174.2[金属学及工艺—金属表面处理]