Abstract
An original approach is explored in the preparation of anisotropic hard magnetic alloys. This constitutes a proof of principle toward the preparation of anisotropic bonded magnets. Nd–Fe–B ribbons (50% Nd2Fe14B+50% Nd–Cu alloy), constituted of Nd2Fe14B grains embedded in a Nd–Cu eutectic matrix, were annealed under an applied magnetic field up to 16 T at various temperatures above the Nd–Cu melting temperature. The grain orientation mechanism is described in terms of a competition between the aligning magnetic field torque acting on the solid magnetic grains and the friction counter torque at the interface between the grains and the liquid matrix. The large temperature effect on the orientation behavior is attributed to the associated increase in the liquid phase volume fraction.
Published Version
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