FABRICATION METHOD OF RARE EARTH PERMANENT MAGNET WITH EXCELLENT MAGNETIC PROPERTY

摘要

A method of manufacturing a rare-earth permanent magnet having excellent magnetic properties according to an embodiment of the present invention relates to a method of manufacturing an R-T-B type rare earth permanent magnet, comprising: preparing a permanent magnet parent alloy by melting an R-T-B type alloy; Crushing the permanent magnet parent alloy to prepare a permanent magnet powder; Forming a permanent magnet compact by applying a magnetic field to the permanent magnet powder in an inert atmosphere to form a permanent magnet compact; Sintering the permanent magnet compact in a vacuum atmosphere to produce a sintered magnet compact having an oxygen content of 0.1 wt% or less; And a diffusion step of diffusing Dy and Tb into the sintered magnet formed body to produce a rare earth permanent magnet.