Rare earth sintered magnet
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United States of America Patent
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Oct 24, 2023
Grant Date -
Apr 9, 2020
app pub date -
Oct 3, 2019
filing date -
Oct 4, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a rare earth sintered magnet in which a multi-layer main phase particle having multiple layers including a layer 1 having R2 concentration, represented by at %, higher than that of a center of the particle, a layer 2 which is formed on the outside of the layer 1 and has R2 concentration lower than that of the layer 1, and a layer 3 which is formed on the outside of the layer 2 and has R2 concentration higher than that of the layer 2 is present at least in a portion in the vicinity of a surface of the main phase particle within at least 500 μm from a surface of the sintered magnet body.
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