Abstract
Anisotropic NdFeB magnets were prepared by single-stage hot deformation using rapidly quenched isotropic powder as raw material. The influence of the particle size of the raw material on the magnetic properties of the anisotropic NdFeB magnets was studied. The best hard magnetic properties were achieved for the particle size range of 45–100 μm. The highest increase of maximum energy product was about 17% due to the increase of remanence by 11% compared with unscreened powders. The effects of particle size on the magnetic properties were discussed on the basis of hot workability and oxidation.
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