R-T-B SINTERED MAGNET

A R-T-B sintered magnet comprising a main phase of R2FemB and a grain boundary phase exhibits a high Br and elevated-temperature stability. The magnet is composed of 12.5-17.0 atom% of R which is typically Nd and Pr, 4.5-5.5 atom% of B, at least 70 atom% of T which is Fe and Co, 0.1-3.0 atom% of Mi...

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Bibliographic Details
Main Authors IIDA, HIROKI, YOSHINARI, AKIHIRO, HIROTA, KOICHI
Format Patent
LanguageEnglish
French
Published 16.05.2024
Subjects
ALLOYS
BASIC ELECTRIC ELEMENTS
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
INDUCTANCES
MAGNETS
METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:A R-T-B sintered magnet comprising a main phase of R2FemB and a grain boundary phase exhibits a high Br and elevated-temperature stability. The magnet is composed of 12.5-17.0 atom% of R which is typically Nd and Pr, 4.5-5.5 atom% of B, at least 70 atom% of T which is Fe and Co, 0.1-3.0 atom% of Mi which is typically Al, Cu or Ga, 0.01-0.5 atom% of M2 which is typically Sn, 0.05-1.0 atom% of M3 which is typically Zr, and up to 0.8 atom% of 0, and the balance of C, N and incidental impurities. The grain boundary phase contains a R-T-(Mi, M2) phase and a R-M2-C phase.
Bibliography:Application Number: CA20233219212