Invention Grant
- Patent Title: Rare earth magnet and method for producing same
- Patent Title (中): 稀土磁铁及其制造方法
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Application No.: US12145595Application Date: 2008-06-25
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Publication No.: US07655325B2Publication Date: 2010-02-02
- Inventor: Tomoki Fukagawa
- Applicant: Tomoki Fukagawa
- Applicant Address: JP Tokyo
- Assignee: Hitachi Metals, Ltd.
- Current Assignee: Hitachi Metals, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Keating & Bennett, LLP.
- Priority: JP2005-378905 20051228
- Main IPC: B32B15/04
- IPC: B32B15/04

Abstract:
A rare-earth magnet includes a magnet body made of an R—Fe—B based rare-earth magnet material (where R is at least one rare-earth element) and a metal film that has been deposited on the surface of the magnet body. The magnet further includes a plurality of reaction layers between the magnet body and the metal film. The reaction layers include: a first reaction layer, which contacts with at least some of R2Fe14B type crystals, included in the magnet body, to have received the rare-earth element that has been included in the R2Fe14B type crystals; and a second reaction layer, which is located between the first reaction layer and the metal film and which has a lower rare-earth element concentration than that of the first reaction layer.
Public/Granted literature
- US20080254285A1 RARE EARTH MAGNET AND METHOD FOR PRODUCING SAME Public/Granted day:2008-10-16
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