May 2017

Journal

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

By:
Li, Ling ; Tirado, Angelica ; Conner, Benjamin S; Elliott, Amelia M; Rios, Orlando ; Zhou, Haidong; Paranthaman, Mariappan
Journal Name:
Journal of Magnetism and Magnetic Materials
Page Number:
163-167
Volume:
438
Issue Number:
4
Publication Date:
May 2017
View DOI Listing:
https://doi.org/10.1016/j.jmmm.2017.04.066

Abstract

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 Hci 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.