| 摘要 |
The problem addressed by the present invention is to provide a method for producing a NdFeB system sintered magnet in which a coating material containing a heavy rare-earth element R H applied to a base material of a NdFeB system sintered magnet is inexpensively prevented from adhering to a tray or similar device in a grain boundary diffusion treatment. In a method for producing a NdFeB system sintered magnet including the steps of applying a coating material R containing a heavy rare-earth element R H to a base material S of a NdFeB system sintered magnet and diffusing the element through grain boundaries in the base material by a grain boundary diffusion method, the coating material R is applied to a sheet 10. The sheet 10 is made to come in tight contact with the base material S so that the coating material R applied to the sheet 10 comes in contact with an application target surface of the base material S. With the sheet 10 held in tight contact with the base material S, the grain boundary diffusion treatment (heat treatment) is performed on the base material S. |
