Carbon-Induced Structural Evolution and Synergistic Enhancement of Wear and Corrosion Resistance in (AlFeCoNi)C High-Entropy Alloy Carbide Films.

IF 3.2 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Materials Pub Date : 2025-09-22 DOI:10.3390/ma18184411

Duoli Chen, Yefeng Zhou, Xianting Yang, Mengyuan Guo, Jun Liang, Deming Huang, Yu Ni, Yurong Zhou, Yantao Li, Xin Jiang

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Abstract

The (AlFeCoNi)C high-entropy alloy carbide films (HECFs) with tunable carbon contents were fabricated by magnetron sputtering to investigate the carbon-driven structural evolution and its coupling effects on mechanical and chemical properties. With increasing carbon incorporation (0-47.6 at.%), the HECFs formed a composite structure of amorphous phase and BCC nanocrystalline phase, as evidenced by XRD and TEM. Atom probe tomography (APT) reveals Al segregation in the film. Remarkably, the wear rate decreases exponentially from 4.8 × 10^-5 to 6.7 × 10^-6 mm³/N·m, attributed to the amorphous carbon phase acting as solid lubricant. Simultaneously, the corrosion current density reduces by two orders of magnitude (7.2 × 10^-8 A/cm² in 3.5% NaCl), benefiting from the amorphous network inhibiting ion diffusion pathways. This work establishes a carbon-content-property correlation paradigm for designing multifunctional HEA films in extreme environments.

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（AlFeCoNi）C高熵合金碳化物薄膜碳致结构演化及耐磨损和耐腐蚀协同增强

采用磁控溅射法制备了碳含量可调的（AlFeCoNi）C高熵合金碳化物薄膜（HECFs），研究了碳驱动的结构演变及其对力学和化学性能的耦合效应。随着碳含量的增加（0-47.6 at）。%)，经XRD和TEM表征，HECFs形成了非晶相和BCC纳米晶相的复合结构。原子探针断层扫描（APT）显示了铝在薄膜中的偏析。磨损率从4.8 × 10-5呈指数下降至6.7 × 10-6 mm3/N·m，这主要归因于非晶碳相作为固体润滑剂的作用。同时，腐蚀电流密度降低了两个数量级（在3.5% NaCl中为7.2 × 10-8 A/cm2），这得益于非晶网络抑制离子扩散途径。本研究建立了在极端环境下设计多功能HEA薄膜的碳含量-性能关联范式。

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

Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

5.80

自引率

14.70%

发文量

7753

审稿时长

1.2 months

期刊介绍： Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.