|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Magnetic Materials for Energy and Power Conversion Applications
||B-4: High Temperature Performance of Dy-free Nd<sub>2</sub>Fe<sub>14</sub>B Based-permanent Magnets
||Kinjal Gandha, Wei Tang, Cajetan Nlebedim
|On-Site Speaker (Planned)
The demands of Nd<sub>2</sub>Fe<sub>14</sub>B based permanent magnets is rapidly increasing due to their excellent magnetic performance for various applications. However, high temperature operations require the addition of significant quantities of Dy; a critical rare earth element. Pr<sub>2</sub>Fe<sub>14</sub>B has high anisotropy in comparison to Nd<sub>2</sub>Fe<sub>14</sub>B, therefore substitution of Pr for Nd in Nd-Fe-B should improve high temperature performance. In this work, effects of Nd and Pr concentration, and co-addition of TiC on crystallization process have been systematically investigated. The temperature dependence of magnetic properties were also studied. We obtained high coercivity ~20 kOe at 300 K in (Nd<sub>0.65</sub>Pr<sub>0.35</sub>)<sub>2.6</sub>Fe<sub>14</sub>B melt-spun ribbons with 4 wt.% TiC without significant reduction in remanence. This work demonstrates the ability to control the evolution of hard magnetic properties in NdFeB magnets by controlling rare earth concentration and microstructural grain refinement.
||Planned: Supplemental Proceedings volume