本文测得碳在Fe-Cu-C和Fe-Cu-Co-C系中的溶解度和分层数据,计算这些体系中Cu和Fe的活度系数以及碳对Cu和Fe活度系数的影响。结果表明,随着体系中碳量的增加,相应地Cu活度系数增加,而Fe活度系数减少。在这些数据的基础上,还计算了Fe-Cu-C系的一级、二级活度相互作用系数,等活度时自由能相互作用系数和焓相互作用系数,并估计了Cu量对碳溶解过剩焓的影响。计算结果与其它已报道的Fe-j-C系相比较,发现这些热力学性质与原子序数之间有一定的规律。
The solubility of C and the activity coefficient of Cu and Fc in Fc-Cu-C and Fc-Cu-Co-C systems at 1550℃ were calculated. The results indicate that the activity coefficient of Cu increases and of Fe decreases with the increase of C content. On the basis of data obtained, the first and second order activity interaction coefficients in Fc-Cu-C systcm and interaction coefficients of free energy or enthalpy at constant activity as well as the partial molar heat of mixing of C affected by the Cu content were estimated. Compared with the thermodynamic functions of other Fc-j-C systems after previous works, the regular correlation between these thermodynamic properties and the atomic number of j element seems to be noticeable.
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