R-T-B-BASED RARE EARTH SINTERED MAGNET AND ALLOY FOR R-T-B-BASED RARE EARTH SINTERED MAGNET
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United States of America Patent
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Issued Date -
Sep 15, 2016
app pub date -
Mar 10, 2016
filing date -
Mar 13, 2015
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Abstract
An R-T-B-based rare earth sintered magnet, comprising a rare earth element R, B, a metallic element M which includes one or more metals selected from Al, Ga and Cu, a transition metal T which includes Fe as a main component, and inevitable impurities, wherein the sintered magnet includes 13 atom % to 15.5 atom % of R, 5.0 atom % to 6.0 atom % of B, 0.1 atom % to 2.4 atom % of M, and T and the inevitable impurities as a balance, and wherein the sintered magnet includes 0.015 atom % to 0.10 atom % of Zr as the transition metal T.
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