增强强制性和Tb分布优化烧结的Nd-Fe-B磁铁的TbF3谷物边界扩散促进了Ga
Ling Wang1, Wenjiao Li1, Xiaopeng Wang1
1Department of Chemical and Material Engineering, Lyuliang University, Lvliang 033001, China.
Molecules (Basel, Switzerland)
|February 13, 2025
概括
在Nd-Fe-B磁铁上同时沉积 (Tb) 和 (Ga),使强制性增加53.15%,而不会减少残留. 这种谷物边界扩散方法增强了磁性和耐腐蚀性,使重稀土含量降低.
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:
- 烧结的铁 (Nd-Fe-B) 磁铁对于高性能应用至关重要.
- 提高Nd-Fe-B磁铁的强制性 (Hcj) 对其磁性特性至关重要.
- 使用重稀土元素的谷物边界扩散是提高强制性的关键方法.
研究的目的:
- 研究 (Tb) 和 (Ga) 共同沉积对烧结 Nd-Fe-B 磁铁的磁性和微观结构的影响.
- 分析沉积序列对Tb扩散的影响及其对强制性的影响.
- 探索一种提高磁铁性能的方法,同时有可能减少重型稀土元素的使用.
主要方法:
- Tb 和 Ga 在 Nd-Fe-B 磁铁表面的共同沉积.
- 分析磁性特性 (强制性,残留性) 和微观结构变化.
- 研究Tb扩散效率及其与磁性性能增强的相关性.
主要成果:
- 与未经处理的磁铁相比,Tb和Ga的同时沉积导致强制性增加了53.15%,而残余没有损失.
- Ga促进了Tb的扩散,导致更高效的Tb替代和增强的强制性.
- 微结构分析显示了更薄,更均的 (Nd,Tb) 2Fe14B外核心结构和Tb透深度的增加.
- 主相粒的异性质场 (HA) 增加,防止反铁磁域核化,改善强制性.
- 观察到增强的热稳定性和改进的耐腐蚀性.
结论:
- 同时 Tb 和 Ga 沉积是一种有效的策略,可以显著提高 Nd-Fe-B 磁铁的强制性.
- Ga作为Tb扩散的促进剂,优化了谷物边界扩散过程.
- 这种方法为生产具有较低重稀土含量,适合工业应用的高性能磁铁提供了途径.
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