Sintered rare earth magnet

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PROBLEM TO BE SOLVED : To provide a sintered Sm2Co17magnet, with which a sintered rare earth magnet can be obtained, which will not cause hydrogen embrittlement even in a hydrogen atmosphere, and which can be used in such as a motor. SOLUTION : A sintered rare earth magnet that comprises 20 to 30 wt.% R (R is Sm or two or more kinds of rare earth elements, containing 50 wt.% more of Sm), 10 to 45 wt.% Fe, 1 to 10 wt.% Cu, and 0.5 to 5 wt.% Zr with the remaining being Co and inevitable impurities, has a metal oxide layer and/or a metal nitride layer directly or via a metal plating layer on the surface of the sintered rare earth magnet. COPYRIGHT : (C)2003, JPO