METHOD FOR MANUFACTURING R-Fe-B BASED SINTERED MAGNET

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PROBLEM TO BE SOLVED : To provide a method for manufacturing an R-Fe-B based sintered magnet having good production efficiency and being capable of suppressing a decrease in residual magnetism. SOLUTION : A method for manufacturing an R-Fe-B based sintered magnet includes the steps of : preparing the R-Fe-B based sintered magnet as a matrix; arranging a heavy rare earth RHX containing at least one of metal dysprosium, hydrogenation dysprosium, terbium, and hydrogenation terbium on a surface of the matrix and arranging an RLF layer containing at least one of praseodymium fluoride, neodymium fluoride, praseodymium oxide, and neodymium oxide on an RHX layer; and diffusing heavy rare earth RXE into an inside of the magnet via the surface of the matrix by performing heat treatment in a diffusion furnace. SELECTED DRAWING : None COPYRIGHT : (C)2018, JPO&INPIT