About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Correlative EBSD, TKD and APT analysis of Grain Boundary Engineered Nd-Fe-B Permanent Magnets |
| Author(s) |
Pradeep Konda Konda Gokuldoss |
| On-Site Speaker (Planned) |
Pradeep Konda Konda Gokuldoss |
| Abstract Scope |
Grain boundary engineered Nd-Fe-B magnet has been one of the most sought-after high performance magnets. The coercivity of Nd-Fe-B magnet can be increased either by reducing the grain size or by tuning the grain boundary chemistry. Accordingly, alloying of Nb or Ce to the Nd-Fe-B magnets restricts the grain growth by the formation of Nb or Ce nano-clusters. Further, when Nd or Dy containing low melting eutectics are diffused along grain boundaries, the Nd-Fe-B grains gets decoupled owing to decoration of eutectics which improves coercivity.
To understand the grain boundary diffusion process in a commercial magnet, a custom designed correlative microscopy platform was utilized enabling orientation imaging in surface and in transmission geometry along with precise local chemical composition analysis using Atom Probe Tomography. This correlative methodology provided deeper insights into the role of processing on the precipitation kinetics and hence on the final magnetic properties of the magnets. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Characterization, Phase Transformations |