R-T-B-BASED RARE EARTH PERMANENT MAGNET, MOTOR, AUTOMOBILE, POWER GENERATOR, AND WIND POWER-GENERATING APPARATUS
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United States of America Patent
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Issued Date -
Apr 25, 2013
app pub date -
May 19, 2011
filing date -
Jun 29, 2010
priority date (Note) -
Abandoned
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Abstract
An R-T-B-based rare earth permanent magnet including a sintered body which is provided with a main phase mainly containing R2Fe14B, and with a grain boundary phase which has a greater R content than said main phase, wherein R denotes a rare earth element including Nd and Dy as an essential element, and the grain boundary phase includes a first grain boundary phase and a second grain boundary phase which have different atomic concentration of Dy to each other.
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