| 摘要 |
PURPOSE:To further promote columnar crystallization of alloy ingot and to try the high performance of a resin, metal, or ceramic coupling Sm2Co17 type permanent magnet by a method wherein carbon C and S, Se, Te, Pb, Cd, Bi, Si or the like are compounded and added to an Sm-Co-Cu-Fe-Nb alloy. CONSTITUTION:Concerning a precipitation hardened type permanent magnet used Sm2Co17 type crystal, when Sm-Co-Cu-Fe-Nb-C-M (M is at least one kind or more out of S, Se, Te, Ce, Pb, Cd, Bi, Si) alloy is dissolved and casted, casting macro structure of this alloy os crystallized in columnar shape as much as possible by the effect of carbon C and this particular element M and thermal treatment for magnetic hardening is applied to the alloy having much columnar crystalliation. After that, pulverization, magnetic field formation are done to intensify coupling by binder. When the composition of this alloy is represented as Sm(Co1-u-v-w-x-yCuuFevNbwCxMy)zSm by the composition formula used atomic ratio, range of composition is 0<u<0.2, 0<v<0.5, 0<w<0.1, 0<x<0.05, 0<y< 0.1, 6.5<=z<=9.0. |
