METHOD FOR MANUFACTURING RARE EARTH MAGNET

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PROBLEM TO BE SOLVED : To provide a method for manufacturing a rare earth magnet, by which a coercive force can be increased while suppressing the decrease in magnetization.SOLUTION : In a method for manufacturing a rare earth magnet from a bulk magnet 1 having main phases and grain boundary phases, the main phases each include rare earth elements, and make a magnetic phase; and the grain boundary phases each include rare earth elements more than those in the main phases, and surround the main phases. The method comprises the steps of : depositing a penetrating material 2 on only the surface of each corner part of the bulk magnet 1; and heating the bulk magnet 1 with the penetrating material 2 deposited thereon, thereby causing diffusion and infiltration of the penetrating material 2 into grain boundary phases located in each corner part and a peripheral edge of the corner part.SELECTED DRAWING : Figure 1COPYRIGHT : (C)2016, JPO&INPIT