Thermodynamic description of Au-Ag-Si ternary system

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. 6; pp. 1405 - 1411
• Main Author: 王江 刘华山 刘立斌 金展鹏
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2007; School of Materials Science and Engineering, Central South University, Changsha 410083, China
• Subjects: Ag-Si binary system; Ag-Si二重系统; Au-Ag-Si ternary system; Au-Ag-Si三重系统; CALPHAD; phase diagram; thermodynamics; 热力学; 相位图表; thermodynamics; CALPHAD; phase diagram; Ag-Si binary system; Au-Ag-Si ternary system
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(07)60285-4

Based on the available experimental information, the Ag-Si CALPHAD method. The solution phases, including liquid, fcc-Al and binary system was thermodynamically assessed using the diamond-A4, were modeled as substitutional solutions, of which the excess Gibbs energies were expressed by Redlich-Kister polynomial functions. Combined with previous assessment of the Ag-Au and Au-Si binary systems, thermodynamic description of the Au-Ag-Si ternary system was performed to reproduce the reported phase equilibria. Thermodynamic properties of liquid alloys, liquidus projection and several vertical and isothermal sections of this ternary system were calculated, which are in reasonable agreement with the reported experimental data.