Thermodynamic data analysis and optimization of the Copper-Silver (Cu-Ag) phase system

Yıl 2024, Cilt: 13 Sayı: 2, 657 - 664, 15.04.2024

Muhsin İder

https://doi.org/10.28948/ngumuh.1257151

Öz

The Copper-Silver (Cu-Ag) thermodynamic database was assessed by employing the Calculation of Phase Diagram (CALPHAD) method with a critical analysis of the latest experimental data. The maximum solubility of copper in the crystalline silver-rich phase was found to be a 0.095-mole fraction. The maximum silver solubility in the solid copper-rich phase was calculated as a 0.046-mole fraction. Random mixing theory was used to model the Gibbs energies of the solid face-centered cubic and liquid phases. The most recent experimental values for copper activity and mixing enthalpy data were considered in the optimization process. A characteristic eutectic Cu-Ag phase diagram with a eutectic temperature of 1052.3 Kelvin was calculated from the optimized database. The thermodynamic properties obtained from the current assessment and calculated phase diagram were found to be more consistent with recent experimental data than previous optimizations.

Anahtar Kelimeler

Cu-Ag phase diagram, Thermodynamic data optimization, Thermodynamic data assessment, Phase diagram

Proje Numarası

Yoktur

Bakır-Gümüş (Cu-Ag) faz sistemi termodinamik veri analizi ve optimizasyonu

Öz

Bakır-Gümüş (Cu-Ag) termodinamik veri tabanı Calculation of Phase Diagram (CALPHAD) metodu kullanılarak en son deneysel verilerin kıyaslamalı analizi ile optimize edilmiştir. Gümüşçe zengin katı fazında maksimum bakır çözünürlüğü mol kesri olarak 0.095 bulunmuştur. Bakır zengin katı fazında maksimum gümüş çözünürlüğü mol kesri olarak 0.046 hesaplanmıştır. Rastlantısal karışım teorisi katı yüzey merkezli kübik fazı ve sıvı fazı Gibbs enerjilerini modellemek için kullanılmıştır. En güncel deneysel bakır aktivitesi değerleri ve karışma entalpisi verileri optimizasyon prosesinde dikkate alınmıştır. Optimize edilen veri tabanından ötektik sıcaklığı 1052.3 Kelvin olan karakteristik bir ötektik Cu-Ag faz diyagramı hesaplanmıştır. Bu kıyaslamalı veri analizi çalışmasından elde edilen termodinamik özellikler ve hesaplanan faz diyagramı en son deneysel verilerle önceki optimizasyon çalışmalarından daha uyumlu bulunmuştur.

Anahtar Kelimeler

Cu-Ag faz diyagramı, Termodinamik veri optimizasyonu, Termodinamik veri analizi, Faz diyagramı

Destekleyen Kurum

Yoktur

Proje Numarası

Yoktur

Teşekkür

Yoktur

Kaynakça

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