通过Dy70Ce70-xCu30的粒度边界扩散来减少烧结Nd-Fe-B磁铁中的重稀土扩散源
Dongbiao Yang1,2, Xiao Gao1,3, Shuwei Zhong1,3
1Jiangxi Provincial Key Laboratory of Magnetic Metallic Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, Ganzhou 341000, China.
Materials (Basel, Switzerland)
|December 17, 2024
概括
将 (Ce) 添加到失铜 (Dy-Cu) 合金中,通过增强扩散和优化微观结构来提高磁性性能. 最佳的10%的Ce添加显著提高了这些稀土磁体的强制性.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 固态物理 固态物理
背景情况:
- 铜 (Dy-Cu) 合金对于高性能磁铁至关重要.
- 优化扩散过程是提高其磁性特性的关键.
- 了解 (Ce) 等添加剂的作用对于合金开发至关重要.
研究的目的:
- 研究 (Ce) 对Dy-Cu合金的扩散行为和磁性特性的影响.
- 为了确定Ce的最佳度,以提高磁性性能.
- 阐明Ce影响Dy扩散和微观结构的机制.
主要方法:
- 合金制备和不同Ce含量的Dy-Cu合金的表征.
- 对扩散行为和相位形成的分析.
- 测量磁性属性,包括强制性.
主要成果:
- (Ce) 的添加降低了点,并促进了低化阶段,增强了扩散.
- 含10重%Ce的Dy-Cu合金表现出最高的磁性性能,强制性从18.47kOe增加到23.60kOe.
- Ce通过促进薄而均的Dy外层的形成来优化Dy的利用和扩散均性,而过度的Ce则会扭曲晶体结构.
结论:
- (Ce) 是一种有效的添加剂,可以改善Dy-Cu合金的扩散过程和磁性.
- 最佳的Ce度平衡了改善的扩散,避免了有害的结构扭曲.
- 这项研究为通过受控扩散和微观结构工程优化稀土磁铁制造提供了一条途径.
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