About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
Cerium-based Gap Magnets Recent Advances in Understanding and Optimization |
Author(s) |
Andriy Palasyuk, Savannah Downing, Olena Palasyuk, Tae-Hoon Kim, Matthew Lynn, Lin Zhou, Matthew J Kramer, Sergey L Bud'ko, Paul C Canfield |
On-Site Speaker (Planned) |
Andriy Palasyuk |
Abstract Scope |
Cerium-based permanent magnets, developed by the Critical Materials Institute (CMI), represent an alternative for supply dependent critical rare-earth (RE) magnets. They are process effective and less susceptible to supply disruptions. Our experiments show that these magnets easily achieve performance in the energy gap currently existing between low- and high-flux RE permanent magnets. Their unique coercivity mechanism doesn't require complicated microstructure developments and opens potential for advanced manufacturing. The mechanism is regulated by Cu, and pinning occurs on the extent of 3D defects originating from structural imperfections observed in the as-cast material and develops into Cu-enriched and Co-depleted regions in the thermally aged material. Our recent comprehensive optimization showed that this critical-rare-earth-free and cost efficient gap magnet can reach the energy performance (BH)max. levels of 14 – 15 MGOe, with Curie temperatures of 400 – 500 oC, remanent magnetizations of 7.5 – 8.5 kG and coercivities of 4 – 5 kOe. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |