| 简介 |
A permanent magnet of an arrangement includes a sintered compact, the sintered compact including : a composition expressed by RpFeqMrCusCo100-p-q-r-s, (R is at least one element selected from rare earth elements, M is at least one element selected from Zr, Ti, and Hf, 10.5≤p≤12.5 atomic%, 24≤q≤40 atomic%, 0.88≤r≤4.5 atomic%, and 3.5≤s≤10.7 atomic%); and a structure having crystal grains each composed of a main phase including a Th2Zn17 crystal phase, and a crystal grain boundary of the crystal grains. An average crystal grain diameter of the crystal grains is 50 µm or more and 100 µm or less, and a ratio of the crystal grains having a crystal grain diameter of 50 µm or more is 75% or more. |
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