Invention Grant
- Patent Title: Permanent magnet and method of producing permanent magnet
- Patent Title (中): 永久磁铁及其制造方法
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Application No.: US13808612Application Date: 2011-07-13
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Publication No.: US09281105B2Publication Date: 2016-03-08
- Inventor: Noritaka Miyamoto , Shinya Omura
- Applicant: Noritaka Miyamoto , Shinya Omura
- Applicant Address: JP Toyota-shi, Aichi-ken
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Toyota-shi, Aichi-ken
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
- Priority: JP2010-159696 20100714; JP2011-151740 20110708
- International Application: PCT/IB2011/001636 WO 20110713
- International Announcement: WO2012/007828 WO 20120119
- Main IPC: H01F7/02
- IPC: H01F7/02 ; H01F1/01 ; H01F41/00 ; H01F41/02 ; H01F1/057
Abstract:
A permanent magnet has a grain structure that includes a main phase and a grain boundary phase that is primarily composed of a first metal. A second metal that enhances the coercivity of the permanent magnet and a third metal that has a lower standard free energy of oxide formation than the first metal and the second metal are diffused in the permanent magnet, and the third metal is present in the form of an oxide in the grain boundary phase.
Public/Granted literature
- US20130135069A1 PERMANENT MAGNET AND METHOD OF PRODUCING PERMANENT MAGNET Public/Granted day:2013-05-30
Information query
