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Critical reassessment of the Fe-Si system
Affiliation:1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, 30, Xueyuan Road, Beijing 100083, China;2. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 30, Xueyuan Road, Beijing 100083, China;1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang 110819, People’s Republic of China;2. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;1. Key Laboratory of Materials Surface Science and Technology of Jiangsu Province, Changzhou University, Changzhou 213164, China;2. School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China;3. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China;1. Institute for Materials Applications in Mechanical Engineering, RWTH Aachen University, D-52062 Aachen, Germany;2. Thermochemistry of Materials Scientific Research Centre, NUST MISIS, Leninsky prosp. 4, 119049 Moscow, Russia;3. Department of Materials Science, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden;4. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, PR China
Abstract:The Fe-Si system has been studied extensively due to its importance in steelmaking and electrical-magnetic applications. Thermodynamic and phase diagram data of the Fe-Si system available in the literature were critically evaluated and re-optimized to improve the thermodynamic description of this system. Two sets of optimized model parameters were obtained to reproduce the available and reliable literature data. In each set of parameters, the liquid phase was described using the modified quasi-chemical model or the Bragg-Williams random mixing model. The A2/B2 and B2/D03 order-disorder transitions were also taken into account in the present study.
Keywords:The Fe-Si system  Phase diagram  Thermodynamic modeling  CALPHAD
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