在粘合磁铁中的图案磁极配置
Malaya Prasad Behera1, Yifan Lv1, Sarat Singamneni2
1Additive Manufacturing Research Centre, Auckland University of Technology, Auckland, New Zealand.
Scientific reports
|March 12, 2026
概括
研究人员使用激光粉床融合开发了新型粘合磁体,通过精确分散多种磁性材料,实现可控的磁异质性. 这一进步允许在3D打印的磁铁中量身定制磁性.
科学领域:
- 材料科学 材料科学 材料科学
- 增材制造 增材制造 增材制造
- 磁力学 磁力学 是一种
背景情况:
- 结合磁铁的增材制造的既定方法包括聚合物挤出,粉末床融合和立体石版.
- 选择性激光烧结 (SLS) 是一种关键的粉床融合技术,用于在聚合物矩阵中巩固磁粒子.
研究的目的:
- 研究激光粉床聚变的潜力,以创建具有受控磁异质性的粘合磁铁.
- 探索受控粉末分散和局部磁场对粒子对齐和磁性特性的影响.
主要方法:
- 利用激光粉床聚变 (LPSF) 来选择性地烧结混合聚合物和磁性粉末 (NdFeB/FeSi和NdFeB/FeCo).
- 在烧结过程中应用局部化的外部磁场来影响颗粒的方向.
- 描述了印刷后和磁化后样本的磁性特性.
主要成果:
- 证明了多种粉末材料的受控分散和局部磁场导致具有工程磁异质性的粘合磁体.
- 作为打印样本显示出弱极化 (1.5-2 mT),但磁化后显著放大了流量值 ( NdFeB/FeCo 的高达 14 mT N / 6 mT S).
- 实现了显著的极分差 (80-100mT北方,50-100mT南方) 并通过持久的残余磁化证实了轻松的轴对齐.
结论:
- 该研究成功地证明了SLS期间受控的粉末分散和局部磁场可以产生具有定制磁异质性的粘合磁体的假设.
- 这项研究为制造先进的磁性元件,使用精确放置的不同磁性材料打开了道路.
- 开发的技术增强了磁性特性,并提供了对增材制造的磁体中磁性异性质的控制.
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