| 摘要 |
PURPOSE:To manufacture a Cu substituted R2Co17 type permanent magnet alloy having superior magnetic characteristics by bringing the oxide of a rare earth metal, powders of Co, Fe, Cu and other specified metal or oxides of the metals, and a reducing agent into a reduction diffusion reaction in a reducing atmosphere. CONSTITUTION:The oxides of one or more kinds of rare earth metals R such as Sm, Ce and Pr are mixed with powders of Co, Fe and Cu or partially or entirely oxidized Co, Fe and Cu, one or two kinds of metals M selected among Si, Ti, Zr, Mn, V, Nb, Cr, Mo and Hf, and one or more among Ca, CaH2 and Mg as a reducing agent so as to provide a composition represented by a formula R(Co1-x-y-zFexCuyMz)A (where 0.01<=x<=0.40, 0.02<=y<=0.25, 0.005<=z<=0.15, and 5.0<=A<=8.5). The mixture is brought into a reduction diffusion reaction by heating at 1,100-1,300 deg.C in a reducing atmosphere for 0.5-5hr to manufacture a permanent magnet alloy having a composition represented by said formula. |
