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| Critical assessment of three kinds of activity coefficients of carbon and related mixing thermodynamic functions of Fe�CC binary melts based on atom�Cmolecule coexistence theory |
| Xue-min Yang1 . Jin-yan Li2 . Fang-jia Yan1 . Dong-ping Duan1 . Jian Zhang3 |
1 CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
2 Department of Metallurgy and Raw Materials, China Metallurgical Industry Planning and Research Institute, Beijing 100711, China
3 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Raoultian activity coefficients ��0C of C in infinitely dilute Fe�CC binary melts at temperatures of 1833, 1873, 1923, and 1973 K have been determined from the converted mass action concentrations N��C of C in Fe�CC binary melts by the developed AMCT-Ni model based on the atom�Cmolecule coexistence theory (AMCT). The obtained expression of ��0C by the developed AMCT-Ni model has been evaluated to be accurate based on the reported ones from the literature. Meanwhile, three activity coefficients ��C, f%,C, and fH,C of C coupled with activity aR,C or a%,C or aH,C have been obtained by the developed AMCT-Ni model and assessed through comparing with the predicted ones by other models from the literature. The first-order activity interaction coefficients ��CC, eCC, and hCC related to ��C, f%,C, and fH,C are also determined and assessed in comparison with the reported ones from the literature. Furthermore, the integral molar mixing thermodynamic functions such as ��mixHm,Fe-C, ��mixSm,Fe-C, and ��mixGm,Fe-C of Fe�CC binary melts over a temperature range from 1833 to 1973 K have been determined and evaluated to be valid based on the determined ones from the literature.
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Received: 04 November 2016
Published: 16 May 2018
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2018, Vol. 25 
