R-T-B RARE EARTH SINTERED MAGNET

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FIELD : chemistry. SUBSTANCE : rare earth sintered magnet consists in fact of 26-36 wt % of R, 0.5-1.5 wt % of B, 0.1-2.0 wt % of Ni, 0.1-3.0 wt % Si, 0.05-1.0 wt % Cu, 0.05-4.0 wt % M, the remaining part - T and occasional admixtures, where R represents rare earth element, T represents Fe or Fe and Co, M is selected from Ga, Zr, Nb, Hf, Ta, W, Mo, Al, V, Cr, Ti, Ag, Mn, Ge, Sn, Bi, Pb and Zn. EFFECT : simultaneous addition of Ni, Si and Cu with high magnetic properties of sintered magnet increases its corrosion resistance. 5 cl, 2 dwg, 2 tbl, 9 ex