Critical thermodynamic evaluation and optimization of the Fe-B, Fe-Nd, B-Nd and Nd-Fe-B systems

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• 作者：Marie-Aline Van Ende ; In-Ho Jung ; ^{in-ho.jung@mcgill.ca}
• 关键词：Rare earth alloys and compounds ; Phase diagrams ; Thermodynamic properties ; Thermodynamic modeling ; Modified Quasichemical Model
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：25 January, 2013
• 年：2013
• 卷：548
• 期：Complete
• 页码：133-154
• 全文大小：1150 K

文摘

All experimental data on phase equilibria and thermodynamic properties of the Fe-B, Fe-Nd and Nd-B binary and Fe-Nd-B ternary systems in literature were reviewed and critically examined. A set of optimized model parameters for all solid stoichiometric compounds, solid solutions and liquid phase was built to reproduce all available reliable thermodynamic properties and phase diagram data within experimental error limits. The solid solutions were modeled using the Compound Energy Formalism. The Modified Quasichemical Model in the pair approximation was used to describe the thermodynamic properties of the liquid solution accurately. The database of the model parameters can be used, along with the software for Gibbs energy minimization, to calculate any type of phase diagram section. Unexplored liquidus projection of the Fe-Nd-B ternary system was predicted from the thermodynamic models and optimized parameters.