梯度磁场增强CoCrCuFeNi高熵合金的硬度和磁性能

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-06-10 DOI:10.1016/j.matlet.2025.138910

Jianjun Guo, Yunfeng Liu, Chen Wei, Jun Wang, Jinshan Li

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引用次数: 0

摘要

利用CoCrCuFeNi高熵合金，揭示了梯度磁场对FCC双相体系的影响机理。施加75 T2/m GMF，合金的晶粒尺寸由58 μm细化到39 μm， Cu-lean FCC1相的比例由77.2%提高到97.5%，并形成规则取向。这种显微组织和相变对机械性能和磁性能有不同的影响。CoCrCuFeNi高熵合金的硬度从305 HV提高到389 HV，饱和磁化强度的提高主要是由于有规则取向的相结构占主导地位和铁磁元素的高浓度，晶粒细化导致晶界密度的增加，这使得矫顽力略有增加。本工作为分析高熵合金在微观结构和多相复杂变化下的力学和磁性演化提供了思路。

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Enhanced hardness and magnetic properties of a CoCrCuFeNi high-entropy alloy under gradient magnetic fields

The mechanism of the influence of the gradient magnetic field on the dual FCC phase system was revealed using CoCrCuFeNi high-entropy alloy. Applying 75 T²/m GMF, the grain size of the alloy was refined from 58 μm to 39 μm, the proportion of Cu-lean FCC₁ phase increased from 77.2 % to 97.5 %, and a regular orientation was formed. Such microstructure and phase transform have divergent effects on mechanical and magnetic properties. The hardness of CoCrCuFeNi high-entropy alloy increased from 305 HV to 389 HV, the increase in saturation magnetization was attributed to the dominance of the regularly oriented phase structure and the high concentration of ferromagnetic elements, and the grain refinement led to an increase in grain boundary density, which slightly increased the coercivity. This work provides ideas for analyzing the mechanical and magnetic evolution of high-entropy alloys caused by complex changes in microstructure and multiphases.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive