Processing of MnBi bulk magnets with enhanced energy product
oleh: Narayan Poudyal, Xubo Liu, Wei Wang, V. Vuong Nguyen, Yilong Ma, Kinjal Gandha, Kevin Elkins, J. Ping Liu, Kewei Sun, M. J. Kramer, Jun Cui
| Format: | Article |
|---|---|
| Diterbitkan: | AIP Publishing LLC 2016-05-01 |
Deskripsi
We report magnetic properties and microstructure of high energy-product MnBi bulk magnets fabricated by low-temperature ball-milling and warm compaction technique. A maximum energy product (BH)max of 8.4 MGOe and a coercivity of 6.2 kOe were obtained in the bulk MnBi magnet at room temperature. Magnetic characterization at elevated temperatures showed an increase in coercivity to 16.2 kOe while (BH)max value decreased to 6.8 MGOe at 400 K. Microstructure characterization revealed that the bulk magnets consist of oriented uniform nanoscale grains with average size about 50 nm.