Introduction of pressure in binary phase diagram calculations. Application to the Ag–Cu system

Experimental phase diagrams are difficult to obtain at high pressures and high temperatures. A way to estimate these diagrams is to calculate them by extrapolating available experimental quantities determined at lower pressures and lower temperatures. A method of phase diagram calculation based on physical models for extrapolations of the data, is suggested in this work. Its reliability has been shown with Ag–Cu phase diagram calculations up to 2000 K and 10 GPa. A good agreement with the available experimental data is observed up to 5 GPa. For higher pressures, experimental data are only available for pure copper up to 97 GPa; therefore, no comparison is possible.