Anisotropic bulk Nd2Fe14B/α-Fe nanohybrid magnets with an enhanced energy product

Abstract Anisotropic bulk Nd 2 Fe 14 B/α-Fe nanohybrid magnets have been prepared by high-pressure thermal compression (HPTC) of the blends of 70 wt% Nd-lean Nd 9 Fe 85.5 Cu 1.5 B 4 amorphous and 30 wt% Nd-rich Nd 13.6 Fe 73.6 Ga 0.6 Co 6.6 B 5.6 nanocrystalline alloys. The nanohybrid magnets have a high fraction ∼24 wt% of α-Fe phase and exhibit a (0 0  l ) texture for Nd 2 Fe 14 B nanocrystals in both Nd-lean and Nd-rich regions. The Nd-lean region contains α-Fe and Nd 2 Fe 14 B nanograins with equivalent sizes of 19 nm and 27 nm and the Nd-rich region comprises Nd 2 Fe 14 B phase having lath nanograins with 20–35 nm in thickness and 50–142 nm in length. This nanohybid magnet exhibits a maximum energy product of 23 MGOe and an enhanced thermal stability. The present work provides a candidate route to fabricate high-performance bulk magnets for practical applications.