通过Tb和多元组件合金的粒度边界扩散对Nd-Fe-B磁铁的微观结构和磁性性能的影响
Fei Wang1, Mei Wang1, Wei-Ming Liu2
1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China.
Materials (Basel, Switzerland)
|February 26, 2025
概括
这项研究使用 (Tb) 扩散增强了-铁- (Nd-Fe-B) 磁铁. 最好的扩散源显著提高了磁性,为磁体优化提供了有前途的方法.
科学领域:
- 材料科学 材料科学 材料科学
- 磁力学 磁力学 是一种
- 固态化学 固态化学
背景情况:
- 铁 (Nd-Fe-B) 磁铁对于高性能应用非常重要.
- 提高它们的磁性,特别是高温下的强制性,仍然是关键的研究挑战.
- 颗粒边界扩散是一种常见的技术,用于修改Nd-Fe-B磁铁的特性.
研究的目的:
- 调查不同含有 (Tb) 的扩散源对商用Nd-Fe-B磁铁磁性特性的影响.
- 评估新型含Tb合金作为扩散源的性能.
- 了解在扩散处理后的微观结构演变和元素分布.
主要方法:
- 商业Nd-Fe-B磁铁被用作起始材料.
- 用纯Tb,Tb60Nd5Al30Ga5,Tb65Pr10Nd5Al5作为扩散源进行了粒度边界扩散.
- 在20°C,90°C和140°C测量了磁性特性.
- 使用各种表征技术分析了组成,微观结构和元素分布.
主要成果:
- 在使用含有Tb的合金进行扩散后,在20°C时观察到49.4%的固有强制性显著增加.
- 在Tb65Pr10Nd5Al5Cu10Ga5的扩散源产生了最高的总体磁性能.
- 微结构分析揭示了粒度边界的网状结构和围绕主相粒度的一致的富含Tb的外,以获得最佳的扩散源.
结论:
- 设计的含有Tb的扩散源有效地增强了Nd-Fe-B磁铁的磁性.
- Tb65Pr10Nd5Al5Cu10Ga5合金是一种高效的扩散源,可以优化Nd-Fe-B磁铁的性能.
- 这项研究提出了一种可行的策略,通过定制的粒度边界扩散来改进Nd-Fe-B磁铁.
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