Magnet material and its manufacturing method

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PROBLEM TO BE SOLVED : To realize a magnet which contains hyperfine crystal grains, and has a high residual magnetic flux density, and a sufficient maximum magnetic energy product. SOLUTION : The magnet material is substantially expressed by the general formula of Rx(T1-u-v-wCuuM1vM2w)1-x-yAy(wherein, R is at least one kind of element selected from rare earth elements inclusive of Y; T is Fe or Co; M1 is at least one kind of element selected from Zr, Ti, Nb, Mo, Ta, W, and Hf; M2 is at least one kind of element selected from Cr, V, Mn, and Ni; A is at least one kind of element selected from N and B; and x, y, u, v, and w are atomic ratios, respectively, and satisfy 0.04≤x≤0.2, 0.001≤y≤0.2, 002≤u≤0.2, 0≤v≤0.2, and 0≤w≤0.2), and contains a 0.2 to 10 vol.% non- magnetic phase containing ≥20 atomic % Cu, and a hard magnetic main phase, and in which the mean crystal grain size of the hard magnetic main phase is ≤100 nm. COPYRIGHT : (C)2003, JPO