METHOD FOR PRODUCING NdFeB SINTERED MAGNET

摘要

The problem of the present invention is to provide a method for producing an NdFeB sintered magnet with which it is possible to prevent, at a low cost, contamination of trays and other tools by the coating material containing heavy rare earth elements (RH) that is applied substrate of an NdFeB sintered magnetic when performing particle boundary diffusion treatment. According to a method for producing an NdFeB sintered magnet whereby a coating material (R) containing a heavy rare earth element (RH)is applied to a substrate (S) of an NdFeB sintered magnetic and caused to diffuse to the particle boundary of the substrate by particle boundary diffusion, the coating material (R) is applied to a sheet (10) and the sheet (10) and substrate (S) are adhered such that the coating substance (R) applied to the sheet (10) contacts the surface to be coated of the substrate (S), and the sheet (10) is adhered to the substrate (S) with or without subjecting the substrate (S) to particle boundary diffusion treatment (heat treatment).