Patent ID: 10074477

Abstract:
A rare earth sintered magnet is an anisotropic sintered body comprising Nd2Fe14 B crystal phase as primary phase and having the composition R1aTbMcSidBe wherein R1 is a rare earth element inclusive of Sc and Y, T is Fe and/or Co, M is Al, Cu, Zn, In, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, “a” to “e” are 12≤a≤17, 0≤c≤10, 0.3≤d≤7, 5≤e≤10, and the balance of b, wherein Dy and/or Tb is diffused into the sintered body from its surface.