Enhancing magnetic performance through microstructure optimization in hydrogenation-disproportionation-desorption-recombination Nd-Fe-B powders

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-01 DOI:10.1016/j.jmmm.2025.173254

Yuan-Fei Yang , Xu-Hua Wang , Ning-Tao Quan , Yang Luo , Zi-Long Wang , Dun-Bo Yu , Zhong-Kai Wang , Tian-Hao Li , Jian-Hui Dong , Yang Lu , Wen-Hui Ma

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引用次数: 0

Abstract

The intricate correlation between microstructural variances and magnetic properties of hydrogenation-disproportionation-desorption-recombination (HDDR) Nd₂Fe₁₄B magnets was investigated. Magnetic properties of HDDR powders vary with the change of particle size, chemical composition, oxygen content, and microstructure, all of which are characterized. The focused ion beam transmission electron microscope (FIB-TEM) was utilized to observe microstructure in the sample, semi-quantitative revealing the differences between the internal and external regions of the powders. Microstructure optimization enhances the remanence and maximum energy product of Nd-Fe-B powders. The impact of microstructure on magnetic properties is also elucidated by a finite element software system. The microstructure and magnetic properties of HDDR powders were optimized by adjusting the macroscopic morphology of the particles.

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氢化-歧化-解吸-复合Nd-Fe-B粉末微结构优化提高磁性能

研究了氢化歧化解吸复合（HDDR） Nd2Fe14B磁体的显微结构差异与磁性能之间的复杂关系。HDDR粉末的磁性能随粒径、化学成分、氧含量和微观结构的变化而变化，并对其进行了表征。利用聚焦离子束透射电子显微镜（FIB-TEM）观察样品的微观结构，半定量地揭示了粉末内部和外部区域的差异。微观结构的优化提高了Nd-Fe-B粉末的剩余物和最大能积。利用有限元软件系统分析了微观结构对磁性能的影响。通过调整HDDR粉末的宏观形貌，优化了粉末的微观结构和磁性能。

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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.