【摘 要】
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The Ge-Yb and Al-Fe-Ti systems were optimized by means of the CALPHAD (Calculation of Phase Diagram) technique.The solution phases,diamond,liquid,fcc-center
【机 构】
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北京科技大学材料科学与工程学院,北京l00083
【出 处】
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第十六届全国相图学术会议暨相图与材料设计国际研讨会
论文部分内容阅读
The Ge-Yb and Al-Fe-Ti systems were optimized by means of the CALPHAD (Calculation of Phase Diagram) technique.The solution phases,diamond,liquid,fcc-centered cubic,and body-centered cubic,hcp were described by the substitutional-solution model.There are six intermetallic compounds (Ge8Yb3,Ge5Yb3,Ge10Yb11,Ge4Yb5,Ge3Yb5 and GeYb2) in Ge-Yb system and they were treated as stoichiometric compounds.In Al-Fe-Ti system,The compounds Ti3Al,TiAl,Ti3Al2,TiAl3 in the Ti-Al system were treated as (Ti,Al,Fe)m(Ti,Al)n by a two-sublattice model in the Al-Fe-Ti system.The compounds Al5Fe2, Al13Fe4 and Al2Fe in the Al-Fe system was treated as (Al,Fe,Ti)5(Al,Fe)2,(Al,Ti)0.6275(Al,Ti,Va)0.1375(Fe)0.235 and (Al,Fe,Ti)2(Al,Fe,Ti)1 respectively in the Al-Fe-Ti ternary system.The compound C14 in the Fe-Ti system was treated as (Al,Fe,Ti)2(Al,Fe,Ti)1 by a two-sublattice model in the Al-Fe-Ti system.Ternary compounds τ2,τ2* and τ3 were treated as (Al,Ti)23(Fe)6,(Al,Ti)3(Fe)1 and Al8Fe1Ti3 respectively.In this work,a self-consistent thermodynamic description of the Ge-Yb and Al-Fe-Ti systems were obtained.
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