摘要
根据Fe-Si相图确定本熔体的结构单元为Fe,Si原子与Fe_2Si,Fe_5Si_3,PeSi和FeSi_2分子。在此基础上按照含化合物金属熔体结构的共存理论,推导出计算该合金系作用浓度的模型。计算结果与实测值符合甚好,从而证明共存理论可反映Fe-Si熔体的结构本质。用上述模型能系统地求出该合金系化合物的全部吉普斯标准生成自由能。
According to the Fe-Si phase diagram, the structural units of this system are Fe and Si atoms as well as Fe2Si, Fe5Si3,FeSi, and FeSi2 molecules. Based on these structural units and the coexistence theory of metallic melt structure involving compound formation a calculating model of mass action conentrations has been derived. Good agreement between results of calculating and experiment shows that the above mentioned model reflects the structural characteristics of Fe-Si melts exactly. By means of this model, systematic data of Gibbs standard free energy of formation for a series of iron silicide have been obtained.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1991年第2期7-12,共6页
Journal of Iron and Steel Research
关键词
Fe-Si溶体
作用浓度
活度
共存理论
activity, the coexistence theory of metallic melt structure involving compound formation, mass action concentrations.
