用快淬方法制备Sm_(2+x)Fe_(17)合金。结果表明;当x=0.7时,可获得α—Fe含量极少的Sm_2Fe_(17)单相。经研磨,渗氮处理后,α—Fe仍能控制在3.0wt—％以下。主相为具有强烈单轴各向异性的Sm_2Fe_(17)相。快淬合金晶粒接近单畴,可望得到高矫顽力。获得的最高磁性能为:Br=0.7T,H_c=761.0kA/m,(BH)=45.6kJ/m~3,T_c=475℃。
Almost single phase Sm_(2+x)Fe_(17) alloy containing minute α-Fe may be preparedby melt-spun at x=0.7. After ball milling and nitriding, α-Fe is still controlled below 3.0wt-%. The primary phase is intense uniaxial anisotropic Sm_2Fe_(17) at room temperature. Therapidly quenched alloy grains are approaching to mono-domain of high coercity. The bestmagnetic properties obtained are: B_r=0.7 T, H_c=761.0 kA / m, (BH)=45.6 kJ/ m~3,T_c=475℃.
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