JP2017118117A5 - - Google Patents

Claims (9)

_{Formula: R p Fe q M r Cu} s Co 100-pqrs
(In the formula, R is at least one element selected from rare earth elements, M is at least one element selected from Zr, Ti, and Hf, and p, q, r, and s are atomic%, respectively. (5 ≦ p ≦ 12.5, 24 ≦ q ≦ 40, 0.88 ≦ r ≦ 4.5, 3.5 ≦ s ≦ 10.7)
A composition represented by:
A permanent magnet comprising a sintered body comprising a crystal grain comprising a main phase including a Th ₂ Zn ₁₇ type crystal phase and a structure having a crystal grain boundary of the crystal grain,
The average grain size of the crystal grains is 25 μm or more,
When indexed the Th ₂ Zn ₁₇ crystal phase as the TbCu ₇ crystal phase, an average of between said the TbCu ₇ crystal phase [0001] shift of the crystal orientation angle to the direction of 45 degrees or more above the grain A permanent magnet having a distance of 120 μm or more. Composition formula: R _p Fe _q M _r Cu _s Co _100-p-q-r-s
(In the formula, R is at least one element selected from rare earth elements, M is at least one element selected from Zr, Ti, and Hf, and p, q, r, and s are atomic%, respectively. (5 ≦ p ≦ 12.5, 24 ≦ q ≦ 40, 0.88 ≦ r ≦ 4.5, 3.5 ≦ s ≦ 10.7)
A composition represented by:
Th ₂ Zn ₁₇ A permanent magnet comprising a sintered body comprising crystal grains comprising a main phase including a type crystal phase and a structure having a crystal grain boundary of the crystal grains,
Th ₂ Zn ₁₇ Type crystal phase is TbCu ₇ When indexed as a type crystal phase, the TbCu ₇ A permanent magnet in which a deviation of a crystal orientation angle with respect to a [0001] orientation of a type crystal phase is 45 degrees or more, and an average distance between the crystal grains is 120 μm or more.   The permanent magnet according to claim 1, wherein an average crystal grain size of the crystal grains is 200 μm or less. It said main phase, a cell phase having the Th ₂ Zn ₁₇ crystal phase, and a cell wall phase present so as to surround the cell phase, claims 1 according to any one of claims 3 permanent magnet. Wherein more than 50 atomic% of the element R in the composition formula of Sm, and 50 atomic% or more Zr element M, the permanent magnet according to any one of claims 1 to 4. 20% or less of Co in the composition formula is substituted with at least one element A selected from Ni, V, Cr, Mn, Al, Si, Ga, Nb, Ta and W. The permanent magnet according to claim 5 . A motor comprising the permanent magnet according to any one of claims 1 to 6 . A generator comprising the permanent magnet according to any one of claims 1 to 6 . Car having a generator according to the motor or claim 8 according to claim 7.