Co-Dy 兴奋剂对 Nd-Fe-B 合金温度稳定性和磁性性能的影响:第一原则和特征分析
Liangshuo Zhao1, Jingxue Zhou2, Quanli Liu2
1Materials Science and Engineering, China University of Petroleum Huadong, Qingdao 266000, China.
ACS omega
|October 27, 2025
概括
- (Co-Dy) 配合增强了-铁- (Nd-Fe-B) 合金的温度稳定性和磁性. 在8.6重量%的Co-Dy中,最佳的兴奋剂显著提高了先进的稀土磁铁在高温下的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 磁力学 磁力学 是一种
背景情况:
- -铁- (Nd-Fe-B) 合金对于永久磁铁至关重要,但受到温度不稳定的影响.
- 开发新型稀土磁性材料需要了解对磁性和热稳定的兴奋剂效应.
研究的目的:
- 调查- (Co-Dy) 合金对-Fe-B合金磁性和温度稳定性的影响.
- 通过实验和理论方法阐明Co-Dycodoping对磁性性能影响背后的机制.
主要方法:
- 使用X射线衍射 (XRD),EPMA-EDS,MFM和磁性测试进行实验性表征.
- 基于密度函数理论 (DFT) 的第一原则计算,以建模Co-Dy合的NdFeBDy.
- 系统地研究各种 Co-Dy 兴奋剂度的材料特性.
主要成果:
- 耐久性和强制性对Co-Dy含量呈现复杂的依赖性,在8.6重%的Co-Dy中观察到最佳的高温稳定性.
- Co-Dy 配合剂修改电子和磁性结构,改变交换相互作用和晶体场效应.
- 澄清了软磁相组成和分布在影响磁性特性中的作用.
结论:
- Co-Dy 配合提供了一种协同方法,以提高 Nd-Fe-B 磁铁的磁性性能和温度稳定性.
- 这项研究为优化稀土磁性材料的理论和实验基础提供了理论和实验基础.
- 这些发现为开发具有优越高温特性的先进稀土磁铁铺平了道路.
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