用逐次逼近法进行三元系Gibbs-Duhem方程积分,由Fe-i-j三元系中已知的lnγ_i的ε-formalism表示式求lnγ_i的ε-formalism表示式的6个常数.用这种方法由本文的第Ⅰ部分实验求得的Fe-B-Si三元系中lnγ_(Si)(1450℃)的数据,求出lnγ_B的表示式中的6个常数: lnγ_B=-2.82,ε_B~B=5.70,ρ_B~B=-2.8 ε_B~(Si)=16.0,ρ_B~(Si)=24.7,ρ_B~(B,Si)=-34.3这种计算方法除lnγ_(Si)的ε-formalism表达式外,无需任何二元系的数据,并保证了ε_B~(Si),ρ_B~(Si)及ρ_B~(B,Si)与Si的相应常数的热力学自洽性.
To calculate the activity coefficient In γ_j in ternary Fe-i-j systems,a method of Gibbs-Duhem intergration using available data of ln γ_i with no extraneed of any binary data has been proposed. Activity coefficient of B and relevantinteraction coefficients have been derived by means of this method with In γ_(Si) valuedetermined experimentally in the part I of the present work: lnγ°B=-2.82,ε_B~B=5.7,ρ_B~B=-2.8l,ε_B~(Si)=16.0 ρ_B~(Si)=24.7 and ρ_B~(B,Si)=-34.3
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