RARE EARTH MAGNET, METHOD FOR MANUFACTURING THE SAME, AND MOTOR INCLUDING THE SAME
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United States of America
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Mar 20, 2025
app pub date -
Aug 29, 2024
filing date -
Aug 29, 2024
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Abstract
Provided is an R-T-B-based rare earth magnet with an excellent magnetic property while ensuring a dimensional accuracy. The present disclosure relates to an R-T-B-based rare earth magnet in which R is a rare earth element, T is Fe and/or Co, and B is boron. The R-T-B-based rare earth magnet includes a magnet region layer and a surface layer covering a C-plane of the magnet region layer. The magnet region layer includes a main phase having an R2T14B-type crystal structure and a grain boundary phase present around the main phase. The main phase has an average grain size from 1.0 μm to 10.0 μm. The surface layer covers 85% or more of the C-plane of the magnet region layer with respect to a total area of the C-plane.
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