Invention Application
- Patent Title: RARE EARTH MAGNET
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Application No.: US15380079Application Date: 2016-12-15
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Publication No.: US20170178772A1Publication Date: 2017-06-22
- Inventor: Noritsugu SAKUMA , Akira KATO , Masao YANO , Shunji SUZUKI , Kurima KOBAYASHI
- Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Applicant Address: JP Toyota-shi
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee Address: JP Toyota-shi
- Priority: JP2015-247317 20151218
- Main IPC: H01F1/053
- IPC: H01F1/053 ; C22C38/10 ; C22C38/00 ; C22C38/14 ; C22C38/12

Abstract:
A rare earth magnet having a main phase and a sub-phase, wherein the main phase has a ThMn12-type crystal structure; the sub-phase contains at least any one of an Sm5Fe17-based phase, an SmCo5-based phase, an Sm2O3-based phase, and an Sm7Cu3-based phase; assuming that the volume of the rare earth magnet is 100%, the volume fraction of the sub-phase is from 2.3 to 9.5% and the volume fraction of an α-Fe phase is 9.0% or less; and the density of the rare earth magnet is 7.0 g/cm3 or more.
Public/Granted literature
- US10325704B2 Rare earth magnet Public/Granted day:2019-06-18
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