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Zhen He, Songlin Zheng, Lei Zhu, Wuxin Yang, Muhammad D. Hayat, and Yuxin Wang, Fabrication and performance of carbon-sol-reinforced Cu composite coatings, Int. J. Miner. Metall. Mater., (2025). https://doi.org/10.1007/s12613-024-3030-5
Zhen He, Songlin Zheng, Lei Zhu, Wuxin Yang, Muhammad D. Hayat, and Yuxin Wang, Fabrication and performance of carbon-sol-reinforced Cu composite coatings, Int. J. Miner. Metall. Mater., (2025). https://doi.org/10.1007/s12613-024-3030-5
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基于碳溶胶增强的铜基复合镀层的制备与性能

摘要: 为提高铜基镀层的耐磨与耐腐蚀性能,本文采用电解法制备了分散性优异的碳溶胶(CS),并通过共电沉积技术制得了一系列Cu-CS复合镀层。研究采用透射电子显微镜、扫描电子显微镜、X射线衍射、硬度测试、摩擦磨损实验以及电化学测试对CS颗粒及Cu-CS镀层的结构与性能进行了系统分析。结果表明,添加20 mL/L CS时,镀层厚度可达21.8 μm,表现出最致密的结构与最优性能,其硬度达HV0.5 137.1,磨损体积仅为1.15 × 10⁻³ mm³,腐蚀速率降至0.191 mm/a。机理分析表明,分散的碳颗粒作为异质形核核心,可有效细化晶粒,增强强化效应;同时,碳颗粒的润滑作用降低了摩擦系数与磨损量。然而,CS添加量过多将引起碳颗粒团聚,导致结构缺陷并降低整体性能。本研究为碳材料增强金属复合镀层的制备与应用提供了新思路。

 

Fabrication and performance of carbon-sol-reinforced Cu composite coatings

Abstract: This study successfully developed a series of carbon-sol-reinforced copper (Cu-CS) composite coatings by electrodeposition employing a superiorly dispersed carbon sol (CS) to avoid nanoparticle aggregation. The CS, characterized using transmission electron microscopy and zeta potential analysis, consisted of carbon particles with an approximate diameter of 300 nm uniformly distributed in the electrolytes. The characteristics of the composite coating were examined via scanning electron microscopy to observe its microstructures, X-ray diffraction to detect its phase constituents, and durability testing to determine the wear and corrosion resistance. Results indicated a significant improvement in coating thickness, density, and uniformity achieved for the Cu-CS composite coating with the addition of 20 mL/L CS. Moreover, the Cu-CS composite coating exhibited a low wear volume (1.15 × 10−3 mm3), a high hardness (HV0.5 137.1), and a low corrosion rate (0.191 mm/a). The significant contribution of carbon particles to the improvement of coating performance is mainly influenced by two factors, namely, the strengthening and lubricating effects resulting from the incorporated carbon particles. Nevertheless, overdosage of CS can compromise the microstructure of the Cu-CS composite coating, creating defects and undermining its functionality.

 

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