Calorimetric studies and thermodynamic calculations of the Ag-Mg system

•A new calorimetric measurement in liquid Ag-Mg alloys was performed.•Ab initio calculations were utilized for determination mechanical and thermodynamical properties of Ag-Mg compounds.•A new thermodynamic model of Ag-Mg system was proposed. The experimentally determined integral enthalpy of mixing of liquid Ag-Mg alloys has been presented. Three separate measurements have been made at 991, 1141, and 1272 K with the use of an MHTC 96 Line Evo line drop calorimeter. The values of integral molar mixing enthalpy are characterized by negative deviations from the ideal solutions in the entire concentration range. Based on the obtained calorimetric results and other thermodynamic data available in the literature, the Ag-Mg system has been re-optimized. Additionally, the mechanical properties of the Ag-Mg intermetallic phases have been calculated based on the ab initio calculations.