以Miedema二元合金生成热模型及Toop方程为基础,利用元素的基本性质,计算了1073K下Al-Mg-Sc三元合金溶液中组元的活度及组元间活度相互作用系数.结果表明,lnγ0Mg=-0.0054;εMgMg=0.0022;εScMg=εMgSc=0.028;ρMgMg=-0.0013;ρScMg=0.015;ρMgScMg=-0.075.
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