Patent ID: 9190196
Filing Date: 2015-11-17
Classification: B82Y,C22C,C22F,H01F

Abstract:
1. A rare earth magnet comprising: a composition represented by the compositional formula R a, b, c, d, e and f are atomic percentages; R is at least one rare earth element including Y; H is at least one heavy rare earth element from among Dy and Tb; M is at least one element from among Ga, Zn, Si, Al, Nb, Zr, Ni, Cu, Cr, Hf, Mo,P, C, Mg, and V; 13≦a≦20; 0≦b≦4; c=100−a−b−d−e−f; 0≦d≦30; 4≦e≦20; 0≦f≦3, and including a structure constituted by a main phase: a (RH) when a volume of the grain boundary phase to the earth magnet is within a range of from greater than 0% to less than 15%, a ratio of a volume the (RH)(FeCo) when the volume fraction of the grain boundary phase to the rare earth magnet is 15% to 23%, the ratio of the volume of the (RH)(FeCo) when the volume fraction of the grain boundary phase to the rare earth magnet is more than 23%, the ratio of the volume of the (RH)(FeCo)