| 简介 |
A rare earth magnet of the invention has a composition represented by the compositional formula RaHbFecCodBeMf, where : 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 has a structure constituted by a main phase : a (RH)2(FeCo)14B phase and a grain boundary phase : a (RH)(FeCo)4B4 phase and a RH phase, with a crystal grain size of the main phase of 10 nm to 200 nm. |
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