HIGH-CORROSION RESISTANT SINTERED NDFEB MAGNET AND PREPARATION METHOD THEREFOR
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United States of America Patent
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Issued Date -
Dec 19, 2013
app pub date -
Oct 14, 2011
filing date -
Oct 15, 2010
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Abandoned
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Abstract
High corrosion resistant sintered NdFeB magnets are provided with a composition by mass % of NdxRx1Fe100-(x+x1+y+y1+z)TyMy1Bz, where 24≦x≦33, 0≦x1≦15, 1.43≦y≦16.43, 0.1≦y1≦0.6, 0.91≦z≦1.07, R is one or more selected from the group consisting of Dy, Tb, Pr, Ce and Gd, T is one or more selected from the group consisting of Co, Cu and Al, M is one or more selected from the group consisting of Nb, Zr, Ti, Cr and Mo, and M is distributed within the grain boundary phase of the NdFeB magnets.
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