|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Science for High-Performance Permanent Magnets
||Recent Developments in High Coercivity Nd-lean Nd-Fe-B Infiltrated Magnets
||Daniel Salazar, Andrés Martín-Cid, Jose Javier Garitaonandia, Rajasekhar Madugundo, Jose Manuel Barandiaran, George Costas Hadjipanayis
|On-Site Speaker (Planned)
Commercial high-energy permanent magnets (PM) need large amounts of critical and strategic raw materials, such as Dy and Tb, to obtain high values of coercivity and increased thermal stability. To overcome this dependency on scarce materials, worldwide efforts to develop rare-earth lean/free permanent magnets is promoted. We studied the crystallization of melt-spun Dy-free NdFeB(Nb-Cu) alloys with Nd reduced 16-25wt% as a mean of optimizing their microstructure and magnetic properties for PM applications. We report the effect of infiltration treatments on the magnetic properties of such alloys. Experiments were carried out on Nd-Fe-B-(Nb-Cu) melt-spun ribbons with a wide composition range, using the low melting point Pr<sub>3</sub>(Co-Cu) eutectic alloy as the infiltration material. Best results of coercivity enhanced were obtained in samples with high content of α-Fe phase, reaching a maximum coercivity of 25 kOe, similar to that of Dy enriched alloys.
Work supported by DOE-DE-FG02-90ER45413 and EU-Horizon2020-686056.