Liquidus projection and miscibility gap of the Ag-Cu-Te ternary system

IF 1.9 3区材料科学 Q4 CHEMISTRY, PHYSICAL Calphad-computer Coupling of Phase Diagrams and Thermochemistry Pub Date : 2024-11-08 DOI:10.1016/j.calphad.2024.102765

Sinn-wen Chen , Pin-shuo Huang , Yung-Chun Tsai , Yohanes Hutabalian

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Abstract

Ag-Cu-Te is a significant material system, and experimental measurements have been conducted to determine its liquidus projection. Aside from the terminal solid solution phases and binary compounds, there exists a ternary compound known as AgCuTe. The ten primary solidification phases include (Ag), Ag₂Te, Ag_1.9Te, Ag₅Te₃, (Te), CuTe, Cu₃Te₂, Cu₂Te, (Cu), and AgCuTe. A liquid miscibility gap with a very wide compositional range is observed. When the alloys are at temperatures higher than those of the binodal curves, they are entirely molten. Interesting spherical-shaped microstructures are observed when the alloys solidify passing through the liquid miscibility gap. Furthermore, it has been determined that there are nine invariant reactions, consisting of three Class I reactions (L ↔ α + β + γ) three Class II reactions (L + α ↔ β + γ), and three Class III reactions (L + α + β ↔ γ). The highest and lowest invariant reaction temperatures are determined to be 849.0 °C and 308.0 °C, respectively.

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银-铜-碲三元体系的液相投影和混溶间隙

银-铜-碲是一种重要的材料系统，人们通过实验测量来确定其液相投影。除了终端固溶相和二元化合物外，还有一种称为 AgCuTe 的三元化合物。十种主要固溶相包括（Ag）、Ag2Te、Ag1.9Te、Ag5Te3、（Te）、CuTe、Cu3Te2、Cu2Te、（Cu）和 AgCuTe。观察到液态混溶间隙的成分范围非常宽。当合金的温度高于二元曲线的温度时，它们完全熔化。当合金凝固穿过液体混溶间隙时，会观察到有趣的球形微结构。此外，还确定了九种不变反应，包括三种 I 类反应（L ↔ α + β + γ）、三种 II 类反应（L + α ↔ β + γ）和三种 III 类反应（L + α + β ↔ γ）。最高和最低不变反应温度分别为 849.0 ℃ 和 308.0 ℃。

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来源期刊

Calphad-computer Coupling of Phase Diagrams and Thermochemistry 化学-热力学

CiteScore

4.00

自引率

16.70%

发文量

审稿时长

2.5 months

期刊介绍： The design of industrial processes requires reliable thermodynamic data. CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) aims to promote computational thermodynamics through development of models to represent thermodynamic properties for various phases which permit prediction of properties of multicomponent systems from those of binary and ternary subsystems, critical assessment of data and their incorporation into self-consistent databases, development of software to optimize and derive thermodynamic parameters and the development and use of databanks for calculations to improve understanding of various industrial and technological processes. This work is disseminated through the CALPHAD journal and its annual conference.