RARE EARTH MAGNET PRECURSOR OR RARE EARTH MAGNET MOLDING HAVING ROUGHENED STRUCTURE ON SURFACE AND METHOD FOR MANUFACTURING SAME

摘要

Provided are a rare earth magnet precursor having a roughened structure on the surface or a rare earth magnet molding having a roughened structure on the surface, and a method for manufacturing the same. In the rare earth magnet precursor or the rare earth magnet molding, the surface having the roughened structure is formed with unevenness satisfying at least one of the following (a) to (c): (a) Sa (arithmetic average height) (ISO 25178) is 5 to 300 μm; (b) Sz (maximum height) (ISO 25178) is 50 to 1500 μm; and (c) Sdr (developed area ratio of interface) (ISO 25178) is 0.3 to 12.