RARE EARTH SINTERED MAGNET AND MAKING METHOD

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A strip cast alloy containing Nd in excess of the stoichiometry of Nd2Fe14B is subjected to HDDR treatment and diffusion treatment, yielding microcrystalline alloy powder in which major phase crystal grains with a size of 0.1-1 µm are surrounded by Nd-rich grain boundary phase with a width of 2-10 nm.