A high magnetic energy product obtained in hot-deformed Nd-Fe-B magnet by chemical plating Fe-Co bilayer films

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL Journal of Alloys and Compounds Pub Date : 2024-09-18 DOI:10.1016/j.jallcom.2024.176588

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Abstract

This study investigates a novel method, chemical plating, with the goal of integrating nano-sized ferromagnetic materials into hot-deformed Nd-Fe-B magnets, potentially enhancing their magnetic properties. Coating Fe-Co double layers on Nd-Fe-B magnetic powder resulted in a significant improvement in the remanence over 10 %, increasing from 1.37 to 1.45 T, as well as an increase in the maximum magnetic energy product from 45.95 to 52.02 MGOe in hot-deformed Nd-Fe-B magnets. Microstructure observations revealed that the coarse non-oriented grains at the interface of powder ribbons were suppressed and the texture of grain alignment in the interior of powder ribbons was enhanced after the coating of Fe-Co. Additionally, there was a noticeable increase in the concentrations of ferromagnetic elements in intergranular phases. The reduced coarse grain regions, the enhanced grain alignment and the increased ferromagnetic intergranular phases are considered to be the main reasons for the enhancement of remanence and maximum magnetic energy product in hot-deformed magnets.

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本研究探讨了一种新方法--化学镀，目的是将纳米尺寸的铁磁材料整合到热变形钕铁硼磁体中，从而增强其磁性能。在钕铁硼磁粉上镀上铁-钴双层后，剩磁显著提高了 10%以上，从 1.37 T 提高到 1.45 T，热变形钕铁硼磁体的最大磁能积也从 45.95 MGOe 提高到 52.02 MGOe。显微结构观察显示，在涂覆 Fe-Co 后，粉末带界面上的粗大无取向晶粒受到抑制，粉末带内部的晶粒排列纹理得到增强。此外，晶间相中的铁磁元素浓度也明显增加。粗晶粒区域的减少、晶粒排列的增强和晶间铁磁相的增加被认为是热变形磁体剩磁和最大磁能积增强的主要原因。

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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.