It is still a challenge to simultaneously enhance coercivity () and remanence () of hot-deformed Nd-Fe-B magnet due to the coercivity-remanence trade-off dilemma. Here, we achieved this balance between and by flake Cu powder assisted DyF interflake addition. The increases from 1218 to 1496 kA/m and increases from 1.32 to 1.34 T compared with the original magnet. Results show that the width of coarse grain layers reduces because of the introduction of flake Cu, which increases the contact areas of the adjacent grains at ribbon interfaces and suppresses the excessive growth of grains. The stronger degree of texture and higher density compared with the original magnet should take the responsibility for the increase of . Additionally, the aggregation regions of rare earth rich (RE-rich) phase reduce and the betterment of the microstructure is another reason for the enhancement of in the flake Cu aided DyF hot-deformed magnet. This strategy of using flake powder additives provides a promising method for optimizing microstructure and enhancing magnetic properties of hot-deformed Nd-Fe-B magnets.

中文翻译：

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片状铜粉辅助 DyF3 片间添加同时增强热变形 Nd-Fe-B 磁体的矫顽力和剩磁


由于矫顽力-剩磁的权衡困境，同时增强热变形 Nd-Fe-B 磁体的矫顽力 () 和剩磁 () 仍然是一个挑战。在这里，我们通过片状铜粉辅助 DyF 片间添加实现了两者之间的平衡。与原始磁体相比，电流从 1218 kA/m 增加到 1496 kA/m，并且从 1.32 T 增加到 1.34 T。结果表明，片状Cu的引入使粗晶层宽度减小，增加了带材界面相邻晶粒的接触面积，抑制了晶粒的过度长大。与原始磁铁相比，质地更强、密度更高，这应该是 的增加的原因。此外，富稀土相聚集区的减少和微观结构的改善是片状Cu辅助DyF热变形磁体性能增强的另一个原因。这种使用片状粉末添加剂的策略为优化热变形 Nd-Fe-B 磁体的微观结构和增强磁性能提供了一种有前景的方法。