PURPOSE: To provide a method of manufacturing powder for a rare-earth permanent magnet capable of manufacturing the magnet provided with excellent magnetic characteristics at a relatively low sintering temperature.
CONSTITUTION: In a method of manufacturing powder for a rare-earth permanent magnet, with the use of a mixture powder obtained by mixing a powder rich in R obtained by performing a hydrogen occulusion step, namely a Nd 32 to 95(wt.%) powder rich in Nd, with a R2T14B phase powder being a main phase in a powder mixturing step, the powder is pulverized, molded and sintered in a magnetic forming step to manufacture a sintered body (a rare-earth permanent magnet) of a composition of 31Nd-1.0B-remainder Fe(wt.%), any of which is considerably enhanced in magnetic characteristic more than a sintered body (a rare-earth permanent magnet) of a composition of 31Nd-1.0B-remainder Fe(wt.%) manufactured without performing the hydrogen occlusion step and powder mixting step.
OTSUKA TSUTOMU
MAMIYA YOICHI
OTSUKI ETSUO
