| 简介 |
Provided is a process for producing a rare earth magnet in which a diffusion element such as Dy can be diffused inwardly from the surface part of the magnet efficiently. This process for producing a rare earth magnet is characterized by comprising : an adhesion step of adhering a diffusion element capable of diffusing inwardly onto the surface part of a magnet material comprising a molded or sintered body of rare earth alloy particles; and an evaporation step of heating the magnet material under vacuum to evaporate at least a portion of the diffusion element that is accumulated on the surface part of the magnet material. The adhesion step is preferably a deposition step, and the evaporation step is preferably a heating step that is performed subsequent to the deposition step and comprises heating only the magnet material under vacuum. According to this process, the coercivity of a rare earth magnet can be improved while reducing the amount of a rare element such as Dy to be used. In other words, the present invention enables the production of a rare earth magnet having significantly improved coercivity efficiency. |
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