RARE EARTH MAGNET AND ITS PREPARATION

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PURPOSE : A rare earth magnet and a manufacturing method thereof are provided to reduce danger due to the oxidation of power by coating and diffusing rapid cooling alloy powder with R^2 and M on a sinter.CONSTITUTION : Allow powder including R^2 and M is prepared. The alloy power is coated on the surface of the sinter. R^2 elements are diffused in the sinter by heating the sinter and the alloy powder under vacuum or inactive gas atmosphere at a sintering temperature or less. The alloy powder is the rapidly cooled alloy powder by rapidly cooling the molten metal including R^2 and M.COPYRIGHT KIPO 2011