You Zhimin, Zhang Hao, Cui Senlin, Jiang Zhouhua, Jung In-Ho
School of Metallurgy, Northeastern University, No. 3-11, Wenhua Road, Heping District, Shenyang 110819, China.
School of Civil Aviation, Northwestern Polytechnical University, Xi'an 710072, China.
Materials (Basel). 2023 May 31;16(11):4099. doi: 10.3390/ma16114099.
Thermodynamic modeling of the Si-P and Si-Fe-P systems was performed using the CALculation of PHAse Diagram (CALPHAD) method based on critical evaluation of available experimental data in the literature. The liquid and solid solutions were described using the Modified Quasichemical Model accounting for the short-range ordering and Compound Energy Formalism considering the crystallographic structure, respectively. In the present study, the phase boundaries for the liquidus and solid Si phases of the Si-P system were reoptimized. Furthermore, the Gibbs energies of the liquid solution, (Fe)(P,Si), (Fe)(P,Si), and (Fe)(P,Si) solid solutions and FeSiP compound were carefully determined to resolve the discrepancies in previously assessed vertical sections, isothermal sections of phase diagrams, and liquid surface projection of the Si-Fe-P system. These thermodynamic data are of great necessity for a sound description of the entire Si-Fe-P system. The optimized model parameters from the present study can be used to predict any unexplored phase diagrams and thermodynamic properties within the Si-Fe-P alloys.
基于对文献中现有实验数据的严格评估,采用相图计算(CALPHAD)方法对Si-P和Si-Fe-P体系进行了热力学建模。分别使用考虑短程有序的修正准化学模型和考虑晶体结构的化合物能量形式来描述液相和固溶体。在本研究中,对Si-P体系的液相线和固态Si相的相界进行了重新优化。此外,仔细确定了液相溶液、(Fe)(P,Si)、(Fe)(P,Si)和(Fe)(P,Si)固溶体以及FeSiP化合物的吉布斯自由能,以解决先前评估的相图垂直截面、等温截面以及Si-Fe-P体系的液体表面投影中的差异。这些热力学数据对于全面描述整个Si-Fe-P体系非常必要。本研究中优化的模型参数可用于预测Si-Fe-P合金中任何未探索的相图和热力学性质。