Abstract
Aligning the hard phase has always been a great challenge in fabricating bulk nanocomposite magnets due to the high soft-phase fractions. In this work, anisotropic bulk Pr2Fe14B/α-Fe nanocomposite magnets have been fabricated from amorphous precursors by high-pressure thermal compression deformation. The synthesised magnet exhibits an ultrastrong magnetic anisotropy with a high soft-phase fraction of ∼29 wt.% and a dual-morphology grain structure that consists of equiaxed and lath-shaped grains. The anisotropy is originated from the strong (00l) crystallographic texture for Pr2Fe14B nanocrystals on account of its preferential nucleation and growth during the deformation with high stress and large strain. This study is favourable for the development of bulk nanocomposite magnets with superior energy products on the premise of high soft-phase fractions.
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