Permanent magnet, motor, and generator

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United States of America Patent

PATENT NO 9502165
APP PUB NO 20150228385A1
SERIAL NO

14661119

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Abstract

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A permanent magnet includes: a composition expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t (R is at least one element selected from rare-earth elements, M is at least one element selected from Zr, Ti, and Hf, 10.5≦p≦12.5 at %, 23≦q≦40 at %, 0.88≦r≦4.5 at %, 4.5≦t≦10.7 at %); and a metal structure containing a Th2Zn17 crystal phase and a Cu-rich phase having a Cu concentration higher than that of the Th2Zn17 crystal phase. In a cross section including a c-axis of the Th2Zn17 crystal phase, a number of intersections of the Cu-rich phases existing in an area of 1 μm square is 10 or more.

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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
Endo, Masaki Tokyo, JP 51 232
Hagiwara, Masaya Kanagawa, JP 68 214
Horiuchi, Yosuke Tokyo, JP 72 272
Kobayashi, Tadahiko Kanagawa, JP 72 1519
Kobayashi, Tsuyoshi Kanagawa, JP 203 2224
Okamoto, Keiko Kanagawa, JP 39 211
Sakurada, Shinya Tokyo, JP 135 827

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