Invention Grant
- Patent Title: Permanent magnet and method for manufacturing the same, and motor and power generator using the same
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Application No.: US13616833Application Date: 2012-09-14
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Publication No.: US09774234B2Publication Date: 2017-09-26
- Inventor: Yosuke Horiuchi , Shinya Sakurada , Keiko Okamoto , Masaya Hagiwara
- Applicant: Yosuke Horiuchi , Shinya Sakurada , Keiko Okamoto , Masaya Hagiwara
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Main IPC: H01F7/02
- IPC: H01F7/02 ; B22F3/24 ; H01F41/02 ; H02K21/00 ; C22C19/07 ; C22C33/02 ; H01F1/055 ; C22C1/02

Abstract:
In an embodiment, a permanent magnet includes a composition represented by a composition formula: R(FepMqCur(Co1-sAs)1-p-q-r)z, where, R is at least one element selected from rare earth elements, M is at least one element selected from Ti, Zr, and Hf, A is at least one element selected from Ni, V, Cr, Mn, Al, Si, Ga, Nb, Ta, and W, 0.05≦p≦0.6, 0.005≦q≦0.1, 0.01≦r≦0.15, 0≦s≦0.2, and 4≦z≦9, and a two-phase structure of a Th2Zn17 crystal phase and a copper-rich phase. In a cross-section of the permanent magnet containing a crystal c axis of the Th2Zn17 crystal phase, an average distance between the copper-rich phases is 120 nm or less.
Public/Granted literature
- US20130241333A1 PERMANENT MAGNET AND METHOD FOR MANUFACTURING THE SAME, AND MOTOR AND POWER GENERATOR USING THE SAME Public/Granted day:2013-09-19
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