| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Grain Size Optimization for Sm2Fe17N3 |
| Author(s) |
Rambabu Kuchi, Ihor Z Hlova, Xubo Liu, Olena Palasyuk, Jordan Schlagel, Devo Schlagel, Andrew Piersol, Matthew J. Kramer |
| On-Site Speaker (Planned) |
Matthew J. Kramer |
| Abstract Scope |
Developing Sm2Fe17N3 for motors and generators requires balancing optimal grain size and morphology while minimizing detrimental second phases to achieve necessary coercivity (Hci) without sacrificing saturation magnetization (Ms). Reducing grain size below 1 µm complicates handling the compound due to its susceptibility to oxidation and difficulty in grain alignment. Fe and defects at the grain boundaries dramatically decrease Hci. Reducing Sm2O3 by Ca shows better reproducibility compared to wet-chemistry and can be tailored to form either fine grained or coarse grained Sm2Fe17N3 [1]. Our bottom-up approach forms ~< 1 µm grains with Hci ~ 16 kOe and Ms of 137 emu/g. Our top-down approach forms larger grains > 10 µm but when milled produces Hci of ~ 6.5 kOe but higher Ms (160 emu/g) and better remanence (Mr ~ 142 emu/g) with an energy product of 23.5 MGOe.
[1] R. Kuchi et. al., J. Alloy. Compd. 980 (2024) 173532. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Process Technology, Energy Conversion and Storage |