Patent ID: 8298351
Filing Date: 2012-10-30
Classification: B22F,C22C,H01F

Abstract:
1. A R-T-B rare earth sintered magnet in the form of a sintered body having a composition consisting essentially of, in % by weight, 26 to 36% of R, 0.5 to 1.3% of B, 0.1 to 2.0% of Ni, 0.1 to 3.0% of Si, 0.05 to 1.0% of Cu, 0.05 to 4.0% of M, and the balance of T and incidental impurities, wherein R is one or more element selected from rare earth elements including Y and Sc, T is Fe or Fe and Co, M is one or more element selected from the group consisting of Ga, Zr, Nb, Hf, Ta, W, Mo, Al, V, Cr, Ti, Ag, Mn, Ge, Sn, Bi, Pb, and Zn, and a phase of compound containing R, Co, Si, Ni and Cu precipitates within the sintered body.