Comparison on the Coercivity Enhancement of Hot-Deformed Nd 2 Fe 14 B-Type Magnets by Doping R 70 Cu 30 (R = Nd, Dy, and Tb) Alloy Powders

Coercivity enhancement effect of the anisotropic hot-deformed NdFeB magnets made from NdFeB MQU-F powders doped with 2 wt% low-melting R70Cu30 (R = Nd, Dy, and Tb) powders was explored. Post-annealing treatment at 600 °C and 700 °C was employed to modify the microstructures and therefore improve the magnetic properties of the hot-deformed magnets. Doping R70Cu30 alloy powders into the hot-deformed...