Permanent magnet and method of manufacturing the same, and motor and power generator using the same

摘要

In an embodiment, a permanent magnet includes a composition represented by R(Fep(TisM1-s)qCur(Co1-tAt)1-p-q-r)z (R is at least one element selected from rare earth elements, M is at least one element selected from Zr and Hf, A is at least one element selected from Ni, V, Cr, Mn, Al, Ga, Nb, Ta and W, and p, q, r, s, t and z are numbers satisfying 0.3≦p≦0.6, 0.01≦q≦0.1, 0.01≦r≦0.15, 0.2≦s≦0.8, 0≦t≦0.2, 6≦z≦9 in an atomic ratio, respectively), and a structure composed mainly of a Th2Zn17 crystal phase and a CaCu5 crystal phase.

主权项

1. A permanent magnet, comprising:
a composition represented by a composition formula:
R(Fep(TisM1-s)qCur(Co1-tAt)1-p-q-r)z where, R is at least one element selected from rare earth elements, M is at least one element selected from Zr and Hf, A is at least one element selected from Ni, V, Cr, Mn, Al, Ga, Nb, Ta and W, p is a number (atomic ratio) satisfying 0.3≦p≦0.6, q is a number (atomic ratio) satisfying 0.01≦q≦0.1, r is a number (atomic ratio) satisfying 0.01≦r≦0.15, s is a number (atomic ratio) satisfying 0.2≦s≦0.5, t is a number (atomic ratio) satisfying 0≦t≦0.2, z is a number (atomic ratio) satisfying 6≦z≦9; and a structure composed mainly of a Th2Zn17 crystal phase and a CaCu5 crystal phase, wherein a ratio (c/a) of a lattice constant c in relation to a lattice constant a in a crystal structure of the permanent magnet is equal to or more than 0.839, where a crystal face perpendicular to a direction of an easy magnetization axis is a face a, one of crystal faces parallel to the direction of the easy magnetization axis is a face b, an x-ray main diffraction angle of the face a is 2θ1, an x-ray main diffraction angle of the face b is 2 θ2, the lattice constant a is defined by 4/31/2 ×d1, the lattice constant c is defined by 2×d2, d1 [unit: angstrom] is λ/(2 sin(2θ1/2), d2 [unit: angstrom] is λ/(2 sin(2θ2/2), and λ is 1.5418 angstrom.