| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Studies of sintered Nb-doped MM-(FeCo)-B-based magnets with the addition of RE-Cu grain boundary modification alloys |
| Author(s) |
Wei Tang, Jing Wang, Chaochao Pan, Yatin Varma, Ryan Ott, Jun Cui |
| On-Site Speaker (Planned) |
Wei Tang |
| Abstract Scope |
Replacing critical rare earth (RE) elements such as Nd and Pr in the RE2Fe14B-type magnet with less critical elements has been intensively studied. Misch metal (MM) containing La and Ce is a good candidate for substituting Nd/Pr. Although the magnets containing MM are not as good as Nd2Fe14B, it has a high potential to be used as the gap magnet between Nd2Fe14B and ferrite magnets. One viable approach to improve MM-magnet’s coercivity is through microstructure engineering. This work systematically investigated the sintered Nb-doped MM-(Fe, Co)1-xNbx-B magnets with the addition of RE-Cu alloy. Nb was doped to modify the grain size, while RE-Cu eutectic alloy was added as a grain boundary modification material to reduce the magnetic coupling between grains. The results show that these microstructure modifications can effectively improve MM-magnets’ coercivity. The relationship of magnetic properties and microstructure of the magnets to Nb and RE-Cu concentrations is analyzed and discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Powder Materials, Process Technology |