METHOD FOR PRODUCING RFeB-BASED MAGNET

文件类型：PDF文档
文件大小：226K
PROBLEM TO BE SOLVED : To provide a method for producing an RFeB-based magnet, in which not only a grain boundary diffusion treatment can be performed so that a heavy rare earth element RH is caused to penetrate in the whole magnet as evenly as possible to thereby produce a magnet that is homogeneous as a whole but also the magnet can be produced without wasting the heavy rare earth element RH. SOLUTION : A method for producing an RFeB-based magnet according to the present invention includes : an RH-containing-substance adhesion step in which an RH-containing slurry 12 obtained by mixing an organic solvent 122 with RH-containing powder 121 that contains at least one heavy rare earth element RH selected from among Dy, Tb and Ho, is blown, in a form of dots or a line, onto a surface of a base material 11 including an RFeB-based sintered magnet or RFeB-based hot-plastic worked magnet which contains a rare earth element R, Fe, and B, thereby adhering an RH-containing substance 13 to the surface of the base material; and a heating step in which the base material 11 to which the RH-containing substance 13 has been adhered is heated to a predetermined temperature at which the heavy rare earth element RH in the RH-containing substance 13 diffuses into the base material 11 through grain boundaries of the base material 11. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2018, JPO&INPIT