Fe-O二元系液相区的试验分析与热力学参数优化  

Experimental Analysis and Thermodynamic Parameter Optimization of Liquid Phase in Fe-O Binary System

作　　者：张德奎 姜岳杉 何燕霖[1] ZHANG Dekui;JIANG Yueshan;HE Yanlin(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444

出　　处：《上海金属》2023年第3期45-50,共6页Shanghai Metals

基　　金：国家自然科学基金(51971127)。

摘　　要：采用无容器激光悬浮加热技术,结合扫描电子显微镜和电子探针显微分析等,对Fe-O二元系液相区进行了相平衡研究。结果表明:Fe-O二元系液相存在溶解度间隙,即存在金属液相与氧化物液相。采用相图计算(CALPHAD)方法并结合试验测得的相平衡信息,对Fe-O二元系液相的热力学参数进行了重新优化,获得了自洽的热力学参数,可为该体系热力学性质的评估提供可靠的数据支撑。Phase equilibrium of the Fe-O binary system in the liquid phase was studied by using the containerless laser suspension heating technology,coupled with scanning electron microscopy(SEM)and electron probe microanalysis(EPMA).The results showed that the liquid phase of the Fe-O binary system had a miscibility gap,that is,the metal liquid phase and the oxide liquid phase coexisted.The thermodynamic parameters of the Fe-O binary system in the liquid phase were re-optimized by using both the calculation of phase diagram(CALPHAD)method and the phase equilibrium information measured by the experiment,and the self-consistent thermodynamic parameters were obtained,which could provide reliable data support for the evaluation of the thermodynamic properties of the system.

关 键 词：Fe-O二元系 无容器激光悬浮加热技术 溶解度间隙 相图计算 

分 类 号：TG113.4[金属学及工艺—物理冶金] TG131[金属学及工艺—金属学]