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采用CALPHAD方法对Al-Fe-P三元系进行了热力学评估,并根据相关的实验数据对边际二元系Al-P进行了热力学再优化,Al-Fe和Fe-P边际二元系的热力学参数取自之前的研究并做了局部调整.根据相图数据和热力学数据优化了Al-Fe-P三元系的热力学模型参数,获得了体系中所有相的Gibbs自由能表达式.所得参数之间自洽且能很好地重现Al-Fe-P体系的大部分实验相图信息.通过驱动力判据和本文优化所得的模型参数,从热力学上解释了该体系非晶形成能力与组成之间的关系.
Thermodynamic evaluation of Al-Fe-P ternary system was carried out by CALPHAD method. Based on the relevant experimental data, thermodynamic optimization of the marginal binary system Al-P was carried out. The thermodynamics of Al-Fe and Fe-P marginal binary system The parameters were taken from previous studies and adjusted locally.The thermodynamic model parameters of the Al-Fe-P ternary system were optimized according to the phase diagram data and thermodynamic data, and the Gibbs free energy expressions of all the phases in the system were obtained. Which can be used to reproduce most experimental phase diagram of Al-Fe-P system.According to the driving force criterion and the model parameters optimized by this paper, the amorphous formation ability and composition of the system are explained thermodynamically The relationship between.