SINTERED R-FE-B PERMANENT MAGNET, PREPARATION METHOD AND USE THEREOF

A sintered R-Fe-B permanent magnet has at least a grain boundary and composite main phase grains. The grain boundary has an RH-rich phase distributed in the form of an agglomerate within the grain boundary between the composite main phase grains, preferably at the intersection of any adjacent three...

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Bibliographic Details
Main Authors AN, Zhongxin, SU, Yunting, LI, Wei, LIU, Zhongyu, LIU, Lei, JIANG, Yunying
Format Patent
LanguageEnglish
Published 15.02.2024
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:A sintered R-Fe-B permanent magnet has at least a grain boundary and composite main phase grains. The grain boundary has an RH-rich phase distributed in the form of an agglomerate within the grain boundary between the composite main phase grains, preferably at the intersection of any adjacent three or more composite main phase grains. The RH-rich phase is continuously distributed along the grain boundary in the form of a thin-layer stripe. The composite main phase grain has a core-shell structure, which includes a core structure having an R-T-B type phase structure and a shell structure on the outer layer of the core structure. The core structure contains Ce-rich main phase grains and Ce-poor main phase grains.
Bibliography:Application Number: US202318448487