|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Science for High-Performance Permanent Magnets
||Quantifying the True Enhancement in Coercivity by Dy Diffusion into Sintered Nd-Fe-B Alloys
||Cajetan Ikenna Nlebedim, Matthew Joseph Kramer
|On-Site Speaker (Planned)
||Cajetan Ikenna Nlebedim
Coercivity and its temperature dependence can be improved by diffusing Dy into sintered Nd-Fe-B. It involves coating sintered Nd-Fe-B with DyF<sub>3</sub> and facilitating diffusion by heat treatment. Magnetic properties of Dy-diffused Nd-Fe-B are reported to improve compared to the starting materials. However, this approach assumes that magnetic properties improvements are only due to the diffused Dy. This presentation will show that such assumption over-quantifies the effect of Dy. It will be shown that, with appropriate heat treatment, comparable improvement in magnetic properties can be obtained without Dy diffusion. This study provides insight into quantifying the true gain in magnetic properties via Dy diffusion into sintered Nd-Fe-B magnets. This is important because Dy is a critical magnet manufacturing raw material. Acknowledgement: This work was supported by the Critical Materials Institute, an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office.