About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Magnetic Materials
|
Presentation Title |
Denitrogenation Process in ThMn12 Nitride by In Situ Neutron Powder Diffraction |
Author(s) |
Jose Maria Porro, Alex Aubert, Ines Puente-Orench, Sorana Luca, Jose Javier S. Garitaonandia, Jose Manuel Barandiaran, George C. Hadjipanayis |
On-Site Speaker (Planned) |
Jose Maria Porro |
Abstract Scope |
ThMn12 nitrides are good candidates for high performance permanent magnets. However, one of the remaining challenges is transfering the good properties of the powder into a bulk magnet. Thus, understanding the denitrogenation process of this phase is crucial. We investigate the magnetic and structural stability of (Nd0.75,Pr0.25)1.2Fe10.5Mo1.5Nx compounds (x=0 and 0.85) as function of temperature by neutron powder diffraction. Thermal dependence of the lattice parameters, formation of α-(Fe,Mo), and the nitrogen content in the nitrides are investigated by heating up to 1010 K. The decomposition takes place mainly via the formation of the α-(Fe,Mo) phase, which starts at around 900 K, whereas the nitrogen remains stable in the lattice. Additionally, we show that the magnetic properties of the nitrides are maintained after the thermal treatments up to 900 K. ThMn12 nitrides with Mo as stabilizing element offer good prospects for a bulk magnet provided an adequate processing route is found. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Powder Materials, |