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We report the coercivity enhancement of hydrogenation–disproportionation–desorption–recombination processed Nd–Fe–B nanocrystalline powders from 1321 to 1552kAm −1 (19.5kOe) by the grain boundary diffusion of Nd–Cu melts with hyper-eutectic compositions. A distinct Nd-rich grain boundary phase was observed after the diffusion process by scanning electron microscopy and transmission electron...
An anisotropic full density Nd–Fe–B nanocrystalline magnet was produced by spark plasma sintering of hydrogenation–decomposition–desorption–recombination processed powder and subsequent in situ hot deformation. The in situ hot deformation caused the Nd 2 Fe 14 B grains elongated normal to the applied pressure with an enhanced c-axis texture. Accordingly, the remanence (B r ...
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