|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Science for High-Performance Permanent Magnets
||Coercivity and Strength Enhancement of a Binder Jetted NdFeB Bonded Magnet by (Pr,Nd)-Cu-Co Alloy Infiltration
||Ling Li, Angelica Tirado, Benjamin Conner, Amy Elliott, Orlando Rios, Haidong Zhou, M. Parans Paranthaman
|On-Site Speaker (Planned)
Bonded NdFeB magnets have experienced a rapid increased usage in automobiles owing to their superior advantages such as complex shape, light weight, etc. Additive manufacturing (AM) enables rapid production with minimum materials waste, offering great potential for large-scale industrial applications. In this work, binder jetting AM technique is employed to fabricate isotropic NdFeB bonded magnets, followed by an infiltration process with low-melting eutectic alloys to enhance the mechanical and magnetic strength of the magnet product. Two alloys with nominal compositions Pr3Cu0.25Co0.75 (PrCuCo) and Nd3Cu0.25Co0.75 (NdCuCo) are diffused into the as printed porous parts in argon atmosphere at 700 °C to 750 °C for 1 - 6h. The intrinsic coercivity Hci of the as printed sample is enhanced from 9.2 kOe to 15.5 kOe (~68.5 %) and 16.9 kOe (~83.7%) after diffusion of PrCuCo and NdCuCo, respectively. The mechanism for the coercivity enhancement will be discussed in terms of microstructural observations.