HIGH-CORROSION RESISTANT SINTERED NDFEB MAGNET AND PREPARATION METHOD THEREFOR

摘要

Provided are a high-corrosion resistant sintered NdFeB magnet and a preparation method therefor. Based on the weight percentage, the composition of the magnet is NdxRxlFel00(x+xl+y+yl+z)TyMylBz, wherein 24=x=33, 0=xl=15, 1.43=y=16.43, 0.1=yl=0.6, 0.91=Z=1.07, R is one or more selected from Dy, Tb, Pr, Ce and Gd, T is one or more selected from Co, Cu and Al, M is one or more selected from Nb, Zr, Ti, Cr, and Mo, and M is distributed in a grain boundary phase of the NdFeB magnet.