对偶材料对铜-石墨复合材料载流摩擦磨损性能的影响

doi:10.19976/j.cnki.43-1448/TF.2024063

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摘要为探究铜-石墨复合材料在不同对偶材料下的载流摩擦磨损性能及相关机理,采用加压烧结法制备2种不同石墨含量的铜-石墨复合材料,并选用T2紫铜、QCr0.8铜锆合金和镀硬金的紫铜作为对偶材料进行载流摩擦磨损实验。通过扫描电镜、纳米压痕仪、表面轮廓仪和销盘摩擦磨损试验仪,对材料的微观结构、硬度和载流摩擦磨损性能进行研究。结果表明：与3种对偶材料对磨,铜-石墨材料的摩擦因数均在0.4~0.5之间,磨损率在10^-13 m³/(N·m)数量级,平均电压降在0.7~1.4 V之间,平均电噪声在0.2~0.7 mV之间。其中,QCr0.8铜锆合金作为对偶材料时,铜-石墨复合材料的载流摩擦磨损性能最佳,表现出最低的磨损率、电压降和电噪声,此时材料的磨损机制主要为剥层磨损和少量磨粒磨损,表面形成了由Pb、石墨和少量氧化物组成的润滑膜。

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	吴海红
	王能慧
	张礼松
	叶佳钰
	王传锋
	涂有旺
	康潇

关键词 ：摩擦配副, 摩擦磨损, 电传输, 铜基复合材料, 载流

Abstract：To investigate the current-carrying friction and wear properties and underlying mechanisms of copper-graphite composites against different counterpart materials, two types of copper-graphite composites with varying graphite contents were prepared using the pressure sintering method. T2 copper, QCr0.8 copper-zirconium alloy, and hard gold-plated copper were selected as counterpart materials for current-carrying friction and wear tests. The microstructure, hardness, and friction and wear properties of the materials were examined using scanning electron microscopy, nanoindentation, surface profilometry, and pin-on-disk friction and wear test apparatus. The results show the average friction factors of the copper-graphite composites range between 0.4 and 0.5, the wear rates are on the order of 10^-13 m³/(N·m), the average voltage drop ranges from 0.7 V to 1.4 V, and the average electrical noise ranges from 0.2 mV to 0.7 mV when grinding with the three counterpart materials. Among these, the copper-graphite composite exhibits the best current-carrying friction and wear properties when paired with QCr0.8

Key words： friction pair friction and wear electrical transmission copper-based composite current-carrying

收稿日期: 2024-07-09 出版日期: 2024-11-18

ZTFLH:

TG146.3

基金资助:江西省重大科技研发专项项目(20223AAE01002)

通讯作者: 康潇,讲师,博士。电话：15116260330。E-mail: kangxiao0601@csu.edu.cn

引用本文:

吴海红, 王能慧, 张礼松, 叶佳钰, 王传锋, 涂有旺, 康潇. 对偶材料对铜-石墨复合材料载流摩擦磨损性能的影响[J]. 粉末冶金材料科学与工程, 2024, 29(5): 384-395.
WU Haihong, WANG Nenghui, ZHANG Lisong, YE Jiayu, WANG Chuanfeng, TU Youwang, KANG Xiao. Effects of counterpart materials on the current-carrying friction and wear properties of copper-graphite composites. Materials Science and Engineering of Powder Metallurgy, 2024, 29(5): 384-395.

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http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2024063 或 http://pmbjb.csu.edu.cn/CN/Y2024/V29/I5/384

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