基于微磁模拟的高强度Nd-Ce-Fe-B磁铁的结构设计,具有轻松的轴垂直方向和高丰度Ce含量
Qian Zhao1, Ying Yu1, Chenlin Tang1
1School of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China.
Nanomaterials (Basel, Switzerland)
|September 12, 2025
概括
在永久磁铁中用取代是关键. 在Nd-Ce-Fe-B磁铁中优化相位排列对于提高磁性性能至关重要,特定结构显示出优越的强制性和能量产物.
科学领域:
- 材料科学 材料科学 材料科学
- 物理 物理学 物理
- 磁力学 磁力学 是一种
背景情况:
- 像Nd-Fe-B这样的稀土磁铁至关重要,但依赖于稀有的元素.
- (Ce) 是 (Nd) 的更丰富的替代品,但Ce的替代往往会降低磁性能.
- 设计Nd-Ce-Fe-B磁铁需要结构优化,以克服性能下降.
研究的目的:
- 为了研究相位排列对Nd-Ce-Fe-B永久磁铁磁性特性的影响.
- 了解双相磁铁中的强制性机制和去磁化过程.
- 为开发高性能Ce替代磁铁提供理论指导.
主要方法:
- 使用MuMax3.11软件进行微磁理论和模拟.
- 模拟立方体和球形Nd-Ce-Fe-B磁铁的模拟,其中Nd2Fe14B和Ce2Fe14B相的体积比为1:1.
- 对去磁化曲线,强制性机制和磁域行为进行分析.
主要成果:
- 所有模拟磁体中的强制性机制都是固定的.
- 与Ce2Fe14B/Nd2Fe14B相比,Nd2Fe14B/Ce2Fe14B结构显示出更高的强制性和最大能量产物.
- 强制性和能量产品随着主阶段体积的增加而下降,在一个值之后稳定.
- 在颗粒外围具有较高异性质的相增强了双相磁铁中的强制性和能量产物.
结论:
- Nd2Fe14B和Ce2Fe14B相的空间布局显著影响磁性特性.
- 优化相位的分布,特别是将更高的异构相位置于外围,对于提高磁铁性能至关重要.
- 这些发现为工业生产具有成本效益和高性能永久磁铁提供了宝贵的理论见解.
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