Thermodynamic assessments of the Ag-Sm and Ag-Tb systems
- 作者：S.L.WangC.P.WangX.J.Liu
- 会议时间：2008-11-01
- 关键词：热力学 ; 相图计算 ; 金属间化合物 ; 二元体系
- 作者单位：Department of Materials Science and Engineering,College of Materials,and Research Center of Materials Design and Applicagons,Xiamen University,Xiamen,361005,P R.China
- 母体文献：第十四届全国相图会议暨国际相图与材料设计研讨会论文集
- 会议名称：第十四届全国相图会议暨国际相图与材料设计研讨会
- 会议地点：长沙
- 主办单位：中国物理学会
- 语种：chi
摘要
The thermodynamic assessments of the Ag-Re(Re:Sm,Tb)binary systems were carried out by using the CALPHAD(Calculation of Phase Diagrams)method based on the experimental data including the thermodynamic properties and phase equilibria.The Gibbs free energies of the liquid,bee,fec,hop and Rhomb_C 19 phases were described by the subregular solution model with the Redlich-Kister equation,and the intermetallic compounds(Ag51Sm14,aAg2Sm,βag2Sm,AgSm,Ag51Tb14,Ag2Tb and AgTb phases)in these two binary systems were described by the sublatticc model.The thermodynamic parameters of each phase in the Ag-Re(Re:Sm,Tb)binary systems were obtained,and an agreement between the calculated results and experimental data was obtained in each binary system.