Magnetic and microstructural evolution of Nd-Fe-B processed via HDDR (hydrogenation-disproportionation-desorption-recombination) and Melt-Spinning sintered by SPS (spark plasma sintering)

This research aims to examine the possibility of sintering Nd-Fe-B nanocrystalline powders treated by HDDR and melt-spinning through spark plasma sintering. These sintered magnets are evaluated based on their magnetic properties and microstructural characteristics. High grain growth is observed in the nanocrystalline powders which directly affects their remanence, maximum energy product, and coercivity.