Performance evaluation of Cu-based contact material reinforced by the CuCrNiCoFe high entropy particles

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2025-10-06 DOI:10.1016/j.wear.2025.206373

Jiacheng Tong , Jun Wang , Huimin Zhang , Haoran Liu , Youchang Sun , Zhiguo Li , Wenyi Zhang , Zhe Wang , Yanli Chang , Zhao Yuan , Henry Hu

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引用次数: 0

Abstract

In this study, Cu-based contact materials reinforced with 20 wt% high-entropy alloy particles of CuCrNiCoFe were successfully prepared by combining ball milling and spark plasma sintering (SPS) technology. The microstructure and fundamental physical properties of the novel Cu-20HEAs samples were investigated, and their arc erosion behavior was systematically evaluated. The results demonstrate that after low-speed ball milling for 3 h, the high entropy alloys (HEAs) particles achieved uniform distribution within the Cu matrix. Following SPS, the material exhibited excellent overall performance, with an electrical conductivity of 25.5 %IACS, a Vickers hardness of 90.1 HV, and a density of 8.77 g/cm³. The Cu-20HEAs samples displayed favorable resistance to arc erosion during vacuum arc breakdown testing. During arcing, a larger arc diffusion area facilitated rapid dispersion of arc energy, effectively suppressing splashing of the Cu matrix and minimizing mass loss. In 50 arc erosion tests, the dielectric strength of the sample exhibited minimal fluctuation, demonstrating excellent operational stability and a prolonged service life.

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CuCrNiCoFe高熵粒子增强cu基接触材料的性能评价

采用球磨和放电等离子烧结（SPS）相结合的方法，成功制备了20wt %高熵CuCrNiCoFe合金颗粒增强cu基触点材料。研究了新型Cu-20HEAs样品的微观结构和基本物理性能，并对其电弧侵蚀行为进行了系统评价。结果表明：低速球磨3 h后，高熵合金（HEAs）颗粒在Cu基体内分布均匀；SPS后，该材料表现出优异的综合性能，电导率为25.5% IACS，维氏硬度为90.1 HV，密度为8.77 g/cm3。在真空电弧击穿试验中，Cu-20HEAs样品表现出良好的抗电弧侵蚀性能。在电弧过程中，较大的电弧扩散面积有利于电弧能量的快速分散，有效地抑制了Cu基体的飞溅，最大限度地减少了质量损失。在50次电弧侵蚀试验中，样品的介电强度波动最小，表现出优异的工作稳定性和较长的使用寿命。

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.