中文摘要：

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。

英文摘要：

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.