Nb-N solid solution strengthening in (FeCoNiCuNb)Nx high-entropy alloy nitride films

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-06-21 DOI:10.1016/j.vacuum.2025.114536

Yantao Li , Xianting Yang , Yefeng Zhou , Jun Liang , Yu Ni , Yurong Zhou , Deming Huang , Xin Jiang , Donglin Ma

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引用次数: 0

Abstract

High-entropy alloy films composed of 3d transition metals exhibit excellent plasticity, but their strength and wear resistance remain inferior to refractory-metal-based HEA systems. In this paper, a small amount of Nb atoms were introduced into the FeCoNiCu system, and (FeCoNiCuNb)N_x high-entropy alloy nitride films (HENFs) were prepared by reactive magnetron sputtering. The results show that N atoms combine with Nb and Nb-N is uniformly distributed in the film without segregation. With the introduction of N atoms, the film structure still maintains FCC structure, and the grains are refined, and the amorphous region at the grain interface is observed with the high-resolution image. Due to the solid solution strengthening effect, the hardness of the (FeCoNiCuNb)N_x HENFs reaches a maximum of 9.48 GPa and the wear rate reaches a minimum of 1.01 × 10⁻⁶ mm/N·m. Polarization and electrochemical impedance spectrum measurements revealed that all HENFs show good corrosion resistance comparable to the 304 stainless steel in 3.5 wt% NaCl solution. The Nb-N strengthened (FeCoNiCuNb)N_x HENFs can effectively improve the wear resistance without loss of corrosion resistance, which provides a feasible method for the strengthening of 3d transition metals family high-entropy alloy films.

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（FeCoNiCuNb）Nx高熵合金氮化膜中Nb-N固溶体强化

由三维过渡金属组成的高熵合金薄膜具有优异的塑性，但其强度和耐磨性仍不如耐火金属基HEA体系。本文将少量Nb原子引入FeCoNiCu体系，采用反应磁控溅射法制备了（FeCoNiCuNb）Nx高熵合金氮化膜。结果表明：N原子与Nb结合，Nb-N均匀分布在薄膜中，无偏析；随着N原子的引入，薄膜结构仍保持FCC结构，晶粒细化，并在晶粒界面处观察到高分辨率图像的非晶态区。由于固溶强化作用，（FeCoNiCuNb）Nx HENFs的硬度最高可达9.48 GPa，磨损率最低可达1.01 × 10−6 mm/N·m。极化和电化学阻抗谱测试表明，在3.5 wt% NaCl溶液中，所有henf具有与304不锈钢相当的耐腐蚀性。Nb-N强化的（FeCoNiCuNb）Nx HENFs在不损失耐蚀性的前提下，能有效提高其耐磨性，为三维过渡金属族高熵合金薄膜的强化提供了一种可行的方法。

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

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.