Permanent magnet, rotary electrical machine, and vehicle

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United States of America Patent

PATENT NO 10951074
APP PUB NO 20170271929A1
SERIAL NO

15437474

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Abstract

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A permanent magnet is expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t. The magnet comprises a metal structure including a main phase having a Th2Zn17 crystal phase and a grain boundary phase. The main phase includes a cell phase having the Th2Zn17 crystal phase and a Cu-rich phase. A section including a c-axis of the Th2Zn17 crystal phase has a first region in the crystal grain and a second region in the crystal grain, the first region is provided in the cell phase divided by the Cu-rich phase, the second region is provided within a range of not less than 50 nm nor more than 200 nm from the grain boundary phase in a direction perpendicular to an extension direction of the grain boundary phase, and a difference between a Cu concentration of the first region and a Cu concentration of the second region is 0.5 atomic percent or less.

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Patent Owner(s)

  • KABUSHIKI KAISHA TOSHIBA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hagiwara, Masaya Yokohama Kanagawa, JP 64 204
Horiuchi, Yosuke Ota Tokyo, JP 65 266
Kobayashi, Tadahiko Yokohama Kanagawa, JP 72 1515
Sakurada, Shinya Shinagawa Tokyo, JP 132 803
Takahashi, Toshihide Yokohama Kanagawa, JP 35 292

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