An innovative interlayer improving the interfacial connection of FeCoNiCrTi coating on copper surface

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-10-30 DOI:10.1016/j.surfcoat.2024.131541

Chao Zhang , Jun Zhang , Shaowu Zhang , Dongsheng Wang , Wenchao Chen , Huishu Wu , Yuwen Zhang , Xionggang Lu

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Abstract

To improve the performance of copper surface, a FeCoNiCrTi high entropy alloy coating was first attempted to be prepared on copper substrate by plasma cladding. The obtained single-layer coating had a smooth and flat surface, but the interfacial connection was poor. Interfacial defect analysis results showed that the alloying elements dominated by Ti in the coating reacted with the CuO formed during the preheating process on copper surface. A large amount of TiO₂ and other complex oxides were generated and distributed at the interface, which hindered the interfacial connection. After introducing a Ni60A interlayer, the interface reaction between FeCoNiCrTi alloy and copper oxide was avoided, and the inter-diffusion of elements was promoted, thus forming a good metallurgical bonding. Furthermore, due to the dilution effect of Ni60A interlayer, the performance of FeCoNiCrTi surface layer slightly decreased, but still far superior to the Ni60A coating. The microhardness of FeCoNiCrTi surface layer was about 10.7 times that of copper substrate. The wear loss of the developed coating is only 1/2 of that of the single Ni60A coating at 600 °C. This study has a great significance for extending the application of FeCoNiCrTi high entropy alloy coatings in surface strengthening on copper.

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改善铜表面铁钴镍铬钛涂层界面连接的创新夹层

为了改善铜表面的性能，首先尝试用等离子熔覆法在铜基板上制备铁钴镍铬钛高熵合金涂层。得到的单层镀层表面光滑平整，但界面连接不良。界面缺陷分析结果表明，涂层中以 Ti 为主的合金元素与铜表面预热过程中形成的 CuO 发生了反应。大量 TiO2 和其他复合氧化物生成并分布在界面上，阻碍了界面连接。引入 Ni60A 中间膜后，避免了 FeCoNiCrTi 合金与氧化铜之间的界面反应，促进了元素的相互扩散，从而形成良好的冶金结合。此外，由于 Ni60A 夹层的稀释作用，FeCoNiCrTi 表层的性能略有下降，但仍远优于 Ni60A 镀层。铁钴镍铬钛表层的显微硬度约为铜基体的 10.7 倍。在 600 ℃ 下，所开发涂层的磨损损失仅为单一 Ni60A 涂层的 1/2。这项研究对于扩大铁钴镍铬钛高熵合金涂层在铜表面强化中的应用具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.