中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 33 No. 9 September 2023 |
（1. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China;
2. Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health, Anhui University of Science and Technology, Huainan 232001, China;
3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
4. Sino-Precious Metals Holding Co., Ltd., Kunming 650000, China）
Abstract:The phase equilibria of the Ag-Zr-Y system at 800, 600 and 500 °C were investigated by means of X-ray diffraction (XRD) and scanning electron microscope (SEM) with energy dispersive X-ray spectrometry (EDS) techniques. The solubilities of Y in the Ag2Zr and AgZr phases and of Zr in the Ag51Y14, Ag2Y and AgY phases were measured, and no ternary compound was found in these isothermal sections. By means of the CALPHAD method, thermodynamic parameters of the Ag-Zr-Y system were assessed based on the experimental data from the present work and the literature. Substitutional solution model was used to describe the solution phases and sublattice models were used to describe binary compounds. A set of self-consistent and accurately described thermodynamic parameters of the Ag-Zr-Y system were obtained. The representative isothermal sections and liquidus projection were calculated, and the Hill reaction scheme of the Ag-Zr-Y system was constructed. The calculated results are in agreement with the experimental data.
Key words: Ag-Zr-Y ternary system; phase equilibria; experimental determination; thermodynamic modeling; CALPHAD method
