Effects of Hot-Pressing Temperature on the Magnetic Properties of Hot-Pressed Nanocrystalline Nd-Fe-B Magnets

Bulk nanocrystalline Nd-Fe-B magnets are prepared by the hot-pressing method at different temperatures of 450 °C-650 °C. The initial magnetization curve changes from a single-phase magnetization for the magnets prepared below 600 °C to a two-phase magnetization for the magnets prepared at 650 °C. The Henkel plot is also measured to investigate the exchange coupling interaction, and the results sho...