A novel method combining additive manufacturing and alloy infiltration for NdFeB bonded magnet fabrication

作者：Li Ling; Tirado Angelica; Conner B S; Chi Miaofang; Elliott Amy M; Rios Orlando; Zhou Haidong; Paranthaman M Parans^*

来源：Journal of Magnetism and Magnetic Materials, 2017, 438: 163-167.

DOI：10.1016/j.jmmm.2017.04.066

• Additive manufacturing
• NdFeB
• Bonded magnets
• Coercivity
• Infiltration

In this paper, binder jetting additive manufacturing technique is employed to fabricate NdFeB isotropic bonded magnets, followed by an infiltration process with low-melting point eutectic alloys [i.e., Nd3Cu0.25Co0.75 (NdCuCo) and Pr3Cu0.25Co0.75 (PrCuCo)]. Densification and mechanical strength improvement are achieved for the as-printed porous part. Meanwhile, the intrinsic coercivity H-ci is enhanced from 732 to 1345 kA/m and 1233 kA/m after diffusion of NdCuCo and PrCuCo, respectively. This study presents a novel method for fabricating complex-shaped bonded magnets with promising mechanical and magnetic properties. Published by Elsevier B.V.

• 出版日期2017-9-15