A thermodynamic model for non-stoichiometric cementite; the Fe-C phase diagram

作者：Goehring H^*; Leineweber A; Mittemeijer E J

来源：Calphad: Computer Coupling of Phase Diagrams and Thermochemistry , 2016, 52: 38-46.

DOI：10.1016/j.calphad.2015.10.014

• Cementite
• Thermodynamic modelling
• Iron-carbon
• Phase diagram

On the basis of recently published experimental data a new thermodynamic model for the cementite phase was developed, accounting for its non-stoichiometry in equilibrium with alpha, gamma and liquid solution phases. The predictions from the model were discussed in the context of experimental and ab initio data from the literature. Further, the model was compared to existing models for stoichiometric and nonstoichiometric cementite. It was shown that the resulting description is consistent with thermodynamic descriptions of the Fe-C system, excluding the non-stoichiometry of cementite, from the literature. Thus, the new model is suitable as a basis for multi-component systems correctly predicting the constitution of technically applied alloys.

• 出版日期2016-3
• 单位中国科学院金属研究所