Thermodynamics and Chemical Ordering of Liquid Cu-Hf-Ni-Ti-Zr Alloys

被引：0
作者：
Mikhail Turchanin
Pavel Agraval
Liya Dreval
Anna Vodopyanova
机构：
[1] Donbas State Engineering Academy,
[2] MSI,undefined
[3] Materials Science International Services GmbH,undefined
来源：
Journal of Phase Equilibria and Diffusion | 2021年 / 42卷
关键词：
associate solution model; Cu-Hf-Ni-Ti-Zr; high-entropy amorphous alloys; liquid alloys; thermodynamic properties of the liquid phase;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A database to calculate the thermodynamic properties of the liquid quinary Cu-Hf-Ni-Ti-Zr glass forming alloys is developed in the framework of the CALPHAD method. The thermodynamic properties of liquid alloys are modeled using the associate solution model. The thermodynamic properties of three-, four- and five-component liquid alloys of the Cu-Hf-Ni-Ti-Zr system are calculated for a wide composition range. Particular attention is paid to alloys of equiatomic composition, including high-entropy CuHfNiTiZr alloy. The interplay of the ideal and excess contributions to the Gibbs energy of mixing for multicomponent liquid alloys is analyzed, and their role in the thermodynamic stability of the liquid phase is discussed. The amorphization ranges in quaternary and quinary systems are predicted by considering a total molar fraction of associates in liquid alloys. It is shown that equiatomic CuHfNiTiZr liquid falls into the predicted amorphization space. The predicted amorphization ranges for quaternary and quinary systems agree well with available experimental data.
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页码：623 / 646
页数：23
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