OXIDATION-RESISTANT RARE EARTH BASED MAGNET POWDER AND ITS PRODUCING PROCESS

PROBLEM TO BE SOLVED : To provide oxidation-resistant rare earth based magnet powder useful for production of a rare earth based bond magnet exhibiting excellent oxidation-resistance and high magnetic characteristics, and to provide its producing process. SOLUTION : The oxidation-resistant rare earth based magnet powder has a coating layer principally comprising a pigment on the surface thereof, and its producing process comprises a step for mixing rare earth based magnet powder and processing liquid containing a pigment, and a step for drying the processing liquid containing a pigment adhering to the surface of the rare earth based magnet powder.