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

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:438

Article

Li, Ling¹  Tirado, Angelica¹  Conner, B. S.²  Chi, Miaofang³  Elliott, Amy M.⁴  Rios, Orlando²  Zhou, Haidong⁵  Paranthaman, M. Parans¹ 

[1] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[4] Oak Ridge Natl Lab, Mfg Demonstrat Facil, Knoxville, TN 37932 USA

[5] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

关键词: Additive manufacturing;    NdFeB;    Bonded magnets;    Coercivity;    Infiltration;   

DOI  :  10.1016/j.jmmm.2017.04.066

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free