Permanent magnet and method for manufacturing the same, and motor and power generator using the same

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United States of America Patent

PATENT NO 9583243
APP PUB NO 20120074804A1
SERIAL NO

13048321

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Abstract

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In an embodiment, a permanent magnet includes a composition of R (FepMqCur(Co1-sAs)1-p-q-r)z (R: rare earth element, M: Ti, Zr, Hf, A: Ni, V, Cr, Mn, Al, Si, Ga, Nb, Ta, W, 0.05≦p 0.6, 0.005≦q≦0.1, 0.01≦r≦0.15, 0≦s≦0.2, 4≦z≦9). The permanent magnet includes a two-phase structure of a Th2Zn17 crystal phase and a copper-rich phase. An average interval between the copper-rich phases in a cross section including a crystal c axis of the Th2Zn17 crystal phase is in a range of over 120 nm and less than 500 nm.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA TOSHIBAMINATO-KU TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hagiwara, Masaya Yokohama, JP 68 214
Horiuchi, Yosuke Tokyo, JP 72 272
Okamoto, Keiko Kawasaki, JP 39 211
Sakurada, Shinya Shinagawa-ku, JP 135 827

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