RE-X二元合金相图的热力学数据库  

Thermodynamic database of phase diagram in RE-X binary alloy systems

作　　者：刘兴军[1] 张红玲[1] 王书亮[1] 王翠萍[1] 潘复生[2] 汤爱涛[2] 赵栋梁[3] 

机构地区：[1]厦门大学材料学院,厦门361005 [2]重庆大学材料科学与工程学院,重庆400045 [3]北京钢铁研究总院,北京100081

出　　处：《中国有色金属学报》2011年第4期865-874,共10页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50771087)

摘　　要：利用CALPHAD方法,采用亚正规溶体模型、亚点阵模型以及理想气体模型来描述RE-X(Ag,Bi,Cr,Mn,Mo,V,Zn)中二元系各相的Gibbs自由能,并结合相平衡及热力学性质的实验结果,对Ag-RE(RE:Sc,Y,Nd,Sm,Gd,Tb,Ho,Er)、Bi-RE(RE:Nd,Tm,Er,Ho,Pr,Gd)、Cr-RE(RE:Ce,Nd,Sm,Lu)、Mn-RE(RE:Pr,Nd,Sm,Eu,Tb,Dy,Ho,Er,Tm,Yb,Lu)、Mo-RE(RE:Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Tb,Dy,Ho,Er,Tm,Yb,Lu)、V-RE(RE:La,Ce,Pr,Nd,Ho,Lu)和Zn-RE(RE:Y,Ce,Pr,Nd,Sm)各二元系相图进行热力学优化与计算。计算结果与实验数据取得很好的一致性,并结合其他相关稀土二元系相图热力学计算,初步建立部分稀土二元合金相图的热力学数据库。该热力学数据库可以提供相平衡及热力学性质等多种信息,为外推计算稀土多组元体系的相平衡提供理论基础,并为高性能稀土合金材料的设计及制备提供重要的理论指导。The thermodynamic assessments of phase diagrams in the Ag-RE（RE： Sc,Y,Nd,Sm,Gd,Tb,Ho,Er）,Bi-RE（RE： Nd,Tm,Er,Ho,Pr,Gd）,Cr-RE（RE： Ce,Nd,Sm,Lu）,Mn-RE（RE： Pr,Nd,Sm,Eu,Tb,Dy,Ho,Er,Tm,Yb,Lu）,Mo-RE（RE： Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Tb,Dy,Ho,Er,Tm,Yb,Lu）,V-RE（RE： La,Ce,Pr,Nd,Ho,Lu） and Zn-RE（RE： Y,Ce,Pr,Nd,Sm） binary alloy systems were carried out by using calculation of phase diagrams（CALPHAD） method on the basis of the experimental data including thermodynamic properties and phase equilibria.The Gibbs free energies of the solution phases were described by the subregular solution model with Redlich-Kister equation,and those of the intermetallic compounds and gas phase were,respectively,described by sublattice model and ideal gas model.A consistent set of thermodynamic parameters were derived to describe the Gibbs free energies of each solution phase and intermetallic compound.The calculated phase diagrams and thermodynamic properties are in good agreement with the experimental data.The primary thermodynamic database of rare earth alloys is developed,which will provide important information including phase diagrams and various thermodynamic properties for development of rare earth alloy materials.

关 键 词：稀土合金 相图 热力学计算 

分 类 号：TG113.14[金属学及工艺—物理冶金]