MANUFACTURING METHOD OF HIGH PERFORMANCE RARE EARTH MAGNET

The present invention provides a manufacturing method of a high performance rare earth magnet. The method comprises the steps of : preparing a sintered body of a rare earth magnet containing R, Fe, and B as components; aging heavy rare earth fluoride and heavy rare earth hydride in an organic solvent; performing wet-coating a surface of the sintered body with the aged heavy rare earth fluoride and heavy rare earth hydride; and performing heat treatment on the coating material to perform grain boundary diffusion on the coating material. Therefore, the method may remarkably improve magnet characteristics such as coercive force.COPYRIGHT KIPO 2018