| 主权项 |
1. A permanent magnet comprising:
a composition expressed by a composition formula RpFeqMrCutCo100-p-q-r-t, where R is at least one element selected from the group consisting of rare earth elements, M is at least one element selected from the group consisting of Zr, Ti, and Hf, p is a number satisfying 10.8≦p≦12.5 atomic percent, q is a number satisfying 25≦q≦40 atomic percent, r is a number satisfying 0.88≦r≦4.3 atomic percent, and t is a number satisfying 3.5≦t≦13.5 atomic percent; and a metallic structure including a main phase having a Th2Zn17 crystal phase, the main phase having crystal grains,
5% or less of the crystal grains having a grain diameter equal to or smaller than 10 μm,40% or less of the crystal grains having a crystal orientation perpendicular to a (001) plane of the Th2Zn17 crystal phase in a direction deviated 30 degrees or more relative to an axis of easy magnetization. |
