MANUFACTURING METHOD OF RFEB TYPE MAGNET

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PROBLEM TO BE SOLVED : To increase the coercivity of a magnet by uniformly diffusing a heavy rare earth element inside the magnet while reducing the manufacturing cost. SOLUTION : In a manufacturing method of a magnet for performing grain boundary diffusion processing of diffusing a heavy rare earth element RH from the surface of a magnet base material 10 into the magnet base material 10 by heating the magnet base material 10, an alloy 12 containing the heavy rare earth element RH is applied to the surface of the magnet base material 10 in a stripe shape to heat the magnet base material 10. The alloy containing the heavy rare earth element RH is preferably a ribbon 12 produced by a rapid cooling roll method. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2019, JPO&INPIT