选择性激光熔化制备的 AlCoCrCuFeNi 高熵合金的显微结构和磁性能

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-26 DOI:10.1016/j.jallcom.2024.177740

Xuzhao Hu, Zhenlin Xu, Xiquan Jia, Siyuan Li, Zhu Ye, Ailin Xia

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引用次数: 0

摘要

利用选择性激光熔化（SLM）气雾化粉末制备了等原子铝钴铬铜铁镍多组分高熵合金，重点研究了不同激光体积能量密度（VED）对磁性能和微观结构演变的影响。对磁性、电性和机械性能进行了系统研究。打印后的合金主要由体心立方基体组成，并伴有富铜面心立方纳米相的均匀析出。两种合金都显示出典型的铁磁性，具有相对较高的矫顽力、较高的电阻率和优异的硬度。随着 VED 从 54.2 J-mm-3 增加到 109.5 J-mm-3，矫顽力从 218 Oe 增加到 235 Oe，而饱和磁化率则在 41.1 到 44.1 emu-g-1 的一定范围内波动。此外，印刷合金还具有较高的纳米硬度和电阻率，分别为 8.7 GPa 和 356.9 µΩ-cm。较高的矫顽力和较好的综合磁性能有利于设计通过 SLM 方法获得的新型半硬磁性高熵合金。

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Microstructure and magnetic properties of AlCoCrCuFeNi high-entropy alloy prepared by selective laser melting

An equiatomic AlCoCrCuFeNi multi-component high-entropy alloy was prepared by using selective laser melting (SLM) gas-atomized powders, focusing on the effects of different laser volumetric energy densities (VEDs) on the magnetic properties with microstructure evolution. The magnetic, electrical and mechanical properties were studied systematically. The as-printed alloy is mainly composed of body-centered cubic matrix accompanied by the homogeneous precipitation of the Cu-rich face-centered cubic nano-phase. Both alloys display typical ferromagnetism with relatively high coercivity, elevated resistivity, and exceptional hardness. With the VED increased from 54.2 to 109.5 J·mm^-3, the coercivity increased from 218 to 235 Oe, while the saturation magnetization fluctuated within a certain range from 41.1 to 44.1 emu·g^-1. Besides, the printed alloys also have a high nano-hardness and resistivity of 8.7 GPa and 356.9 µΩ·cm, respectively. The higher coercivity and better comprehensive magnetic properties are favorable to design new semi-hard magnetic high-entropy alloys obtained via an SLM method.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.