R-T-B SINTERED MAGNET

A R-T-B sintered magnet comprising a main phase of R2Fe14B 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 % o...

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Bibliographic Details
Main Authors Yoshinari, Akihiro, Hirota, Koichi, Iida, Hiroki
Format Patent
LanguageEnglish
Published 16.05.2024
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:A R-T-B sintered magnet comprising a main phase of R2Fe14B 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 M1 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 O, and the balance of C, N and incidental impurities. The grain boundary phase contains a R-T-(M1, M2) phase and a R-M2-C phase.
Bibliography:Application Number: US202318494864