Zr量によるSm₂Co₁₇磁石合金の磁気特性と構造の変化

抄録

Ribbons with compositions of Sm(Co_0.70−xFe_0.20Cu_0.10Zr_x)_7.5, x=0∼0.06, have been prepared by melt-spinning technique, in order to examine the change of their magnetic properties and structures with Zr content. Under their optimum-aged conditions, the value of coercivity increases drasticaly with the increase of Zr content, x, when 0.02<x<0.04. When x=0.04, the maximum value of coercivity, 1.15 MA/m, is achieved. With the increase of coercivity, the two phase cellular structure composed of the 1-5 and 2-17 phases changes into the three-phase cellular structure superimposed by the 1-3 phase. And the Curie temperatures of the 1-5 and 2-17 phases change very slightly with Zr content.