发明名称 |
Rare earth magnet and process for producing same |
摘要 |
A process for producing a rare earth magnet comprises: an adhesion step of causing a diffusion element capable of diffusing inwardly to adhere to the surface part of a magnet material comprising a compact or sintered body of rare earth alloy particles; and an evaporation step of heating the magnet material in vacuum to evaporate at least a portion of the diffusion element having been retained on or in the surface part of the magnet material. |
申请公布号 |
US8866574(B2) |
申请公布日期 |
2014.10.21 |
申请号 |
US201214000537 |
申请日期 |
2012.03.08 |
申请人 |
Kabushiki Kaisha Toyota Chuo Kenkyusho;Toyota Jidosha Kabushiki Kaisha |
发明人 |
Kaneko Yuji;Takada Yukio;Hiraoka Motoki;Kanada Keiu |
分类号 |
H01F7/02;B05D5/12;H01F1/057;C23C10/28;H01F41/02;B22F3/24 |
主分类号 |
H01F7/02 |
代理机构 |
Oliff PLC |
代理人 |
Oliff PLC |
主权项 |
1. A process for producing a rare earth magnet, the process comprising:
an adhesion step of causing a diffusion element capable of diffusing inwardly to adhere to a surface part of a magnet material comprising a compact or sintered body of rare earth alloy particles; and an evaporation step of heating the magnet material in vacuum to evaporate at least a portion of the diffusion element having been retained on or in the surface part of the magnet material, wherein: the adhesion step is a vapor deposition step that causes heated magnet material and heated diffusion material including the diffusion element to come close to each other in vacuum and exposes the magnet material to a vapor of the diffusion element evaporated from the diffusion material thereby to vapor deposit the diffusion element on the surface of the magnet material; the evaporation step is a step that, subsequently to the vapor deposition step, heats the magnet material in vacuum without cooling the magnet material to room temperature region; and the adhesion step and the evaporation step are repeated in this order. |
地址 |
Nagakute-shi JP |