设计多功能铁磁高熵形状记忆合金（FHESMAs）： Cr和Mn对NiFeGaCo合金结构、物理、磁性和核辐射屏蔽的影响

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-07-14 DOI:10.1016/j.jmmm.2025.173359

İskender Özkul , Oktay Karaduman , Tuncay Şimşek , Telem Şimşek , Canan Aksu Canbay , Ömer Güler , Ghada ALMisned , H.O. Tekin

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引用次数: 0

摘要

本研究系统地研究了Cr和Mn的添加对电弧熔合成法合成的nifegaco基铁磁高熵形状记忆合金（FHESMAs）结构、磁性和辐射屏蔽性能的影响。对制备的NiFeGaCo、NiFeGaCoCr和NiFeGaCoMn合金的相形成、显微组织、马氏体相变行为和磁性能进行了全面表征。结果表明，Mn的加入显著提高了NiFeGaCoMn的磁性能，饱和磁化强度最高（56.64 emu/g），矫顽力最低（5.55 Oe），使得NiFeGaCoMn非常适合软磁应用。相比之下，Cr的加入具有中等的磁性行为，但具有最大的晶粒尺寸和最低的晶格应变，增强了结构稳定性。此外，伽玛射线和快中子屏蔽研究表明，含cr合金在线性衰减系数、半值层、有效电子密度和快中子去除截面值方面表现出优越的性能，而Mn的加入略微降低了这些屏蔽能力。结果表明，在设计具有磁灵敏度和辐射屏蔽效率的fhesma时，添加Cr具有平衡优势，而添加Mn在降低屏蔽特性的情况下更有效地最大化磁性能。

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Designing multifunctional ferromagnetic high-entropy shape memory alloys (FHESMAs): Cr and Mn influence on structural, physical, magnetic and nuclear radiation shielding in NiFeGaCo alloys

This study systematically investigates the influence of Cr and Mn additions on the structural, magnetic, and radiation shielding properties of NiFeGaCo-based ferromagnetic high-entropy shape memory alloys (FHESMAs) synthesized via the arc melting method. The fabricated NiFeGaCo, NiFeGaCoCr, and NiFeGaCoMn alloys were comprehensively characterized in terms of their phase formation, microstructure, martensitic transformation behavior, and magnetic performance. The results demonstrated that Mn addition significantly improved the magnetic properties, yielding the highest saturation magnetization (56.64 emu/g) and lowest coercivity (5.55 Oe), making NiFeGaCoMn highly suitable for soft magnetic applications. In contrast, Cr addition provided moderate magnetic behavior but enhanced structural stability with the largest crystallite size and lowest lattice strain. Moreover, gamma-ray and fast neutron shielding investigations revealed that the Cr-containing alloy exhibited superior performance in terms of linear attenuation coefficient, half-value layer, effective electron density, and fast neutron removal cross-section values, while Mn addition slightly reduced these shielding capabilities. It can be concluded that Cr addition offers a balanced advantage in designing FHESMAs with combined magnetic sensitivity and radiation shielding efficiency, whereas Mn addition is more effective for maximizing magnetic performance with a compromise in shielding characteristics.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.