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基于最新的实验热力学数据和相图数据,采用CALPHAD技术对Fe-P体系进行热力学再优化.其中,溶液相(液相、α-Fe和γ-Fe)的Gibbs自由能用替换溶液模型描述,其余化合物(Fe3P、Fe2P、FeP、FeP2和FeP4)看作严格计量比化合物.整个优化过程在Thermo-Calc软件包中完成,优化所得热力学数据和相图信息与实验信息吻合较好,为Fe基合金和含P多元合金体系的进一步优化提供了一组自洽可靠的热力学参数.
Based on the latest experimental thermodynamic data and phase diagram data, CALPHAD was used to optimize the thermodynamics of Fe-P system, in which the Gibbs free energy of solution phase (liquid phase, α-Fe and γ-Fe) The other compounds (Fe3P, Fe2P, FeP, FeP2 and FeP4) were regarded as strict stoichiometric compounds.The whole optimization process was completed in the Thermo-Calc software package.The optimized thermodynamic data and phase diagram information agreed well with the experimental data, Further optimization of base alloys and P-containing multi-alloy systems provides a set of self-consistent and reliable thermodynamic parameters.