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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >3D printing of NdFeB bonded magnets with SrFe12O19 addition
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3D printing of NdFeB bonded magnets with SrFe12O19 addition

机译：3D打印NDFEB键合磁铁与SRFE12O19添加

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摘要

Rectangular, square, ring and horseshoe-shaped NdFeB bonded magnets with SrFe12O19 addition have been prepared by additive manufacturing, also known as 3D printing. The prepared NdFeB slurries with ferrite addition were deposited to form shaped parts using a 3D printer. Highly loaded pseudo-plastic printing slurries were employed to print bonded magnets with 98% of theoretical density. In the printed magnets with 20 wt.% strontium ferrite (SrFe12O19), good dimensional accuracy and surface quality were obtained with a relatively low surface roughness of similar to 6 mu m. In addition, good coalescence without obvious defects or pores was observed, and the ultimate tensile strength was 12 MPa. The magnetic properties of the hybrid magnets decreased with the increase of SrFe12O19 content due to a lower volume fraction of the NdFeB powder and lower magnetic performance of the SrFe12O19 powder. Nevertheless, the coercivity temperature coefficient beta increased from -0.4%/degrees C to -0.2%/degrees C with the SrFe12O19 content increase to 20 wt.%, indicating better thermal stability of hybrid magnets. The proposed method of fabricating NdFeB bonded magnets significantly reduces the manufacturing cost of complex-shaped magnets, enables efficient utilization of rear earth elements and broadens elevated operating temperature applications. (C) 2018 Elsevier B.V. All rights reserved.
机译：具有SRFE12O19的矩形，方形，环和马蹄形NDFEB键合磁体通过添加剂制造制备，也称为3D印刷。使用3D打印机沉积具有铁素体添加的制备的NdFeB浆料以形成成形部件。采用高负荷的伪塑料印刷浆料来打印具有98％的理论密度的粘合磁体。在具有20重量％的印刷磁体中。％锶铁氧体（SRFE12O19），获得良好的尺寸精度和表面质量，具有相对低的表面粗糙度，类似于6μm。此外，观察到没有明显缺陷或孔的良好聚结，并且最终的拉伸强度为12MPa。由于NdFeB粉末的较低体积分数和SRFE12O19粉末的较低磁性性能，混合磁体的磁性随着SRFE12O19含量的增加而降低。然而，矫顽力温度β从SRFE12O19含量增加到20重量％的-0.4％/℃至-0.2％/℃。％，表明混合磁体的更好的热稳定性。制造NDFEB键合磁体的所提出的方法显着降低了复杂形状磁体的制造成本，使得后土元件的有效利用率和拓宽的操作温度应用。 （c）2018年elestvier b.v.保留所有权利。

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