Phase equilibria in Fe–Mn–S and Fe–Cr–S ternary systems at 1843 K were investigated experimentally, respectively. The main characteristic of these two systems at 1843 K was confirmed to be a wide miscibility gap between two liquid phases: molten metal alloy phase and molten sulfide phase. Through metal/sulfide equilibrium method, activity of constituents in sulfide phase were determined in Fe–Mn–S and Fe–Cr–S systems separately. The activity curves of constituents in sulfide phase were estimated by utilizing regular solution model.

中文翻译：

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1843 K 时熔融 MnS-FeS 和 CrS-FeS 体系的热力学

分别通过实验研究了 1843 K 时 Fe-Mn-S 和 Fe-Cr-S 三元系统的相平衡。这两个系统在 1843 K 时的主要特征被证实是两个液相之间的广泛混溶间隙：熔融金属合金相和熔融硫化物相。通过金属/硫化物平衡法，分别测定了 Fe-Mn-S 和 Fe-Cr-S 体系中硫化物相成分的活性。利用正则溶液模型估算了硫化物相组分的活性曲线。