Thermochemistry of binary liquid alloys of silver with rare earth metals

Experimental investigation and thermodynamic assessment of the Mg–Gd–Ag system focused on Mg-rich region

“…As Ag-Gd binary alloys are promising electronic materials and amorphous materials, the Ag-Gd system has been experimentally investigated repeatedly [25][26][27][28][29][30][31][32][33][34] and thermodynamic assessments have also been performed by various authors [35,36]. Besides the solution phases, the Ag-Gd system contains three intermetallic compounds AgGd, Ag 2 Gd and Ag 51 Gd 14 .…”

Thermochemistry of some binary alloys of silver with the lanthanide metals by high temperature direct synthesis calorimetry

“…However, there are some measurements on liquid-iquid mixing of silver and lanthanide elements by Ivanov and Witusiewicz. who used isoperibolic calorimetry [13] and mass spectrometry [14]. We also found several studies of the Ag-LA systems, particularly of AgDy and AgHo, which all focused on measurements of the dissociation energies in the gas phase using mass spectrometry [15,16].…”

Aurum and europium mixing enthalpies

“…The experimental data on the mixing enthalpies ΔH in liquid alloys were obtained using the calorimetric method for only two systems: Au-Gd at 1650 K over a wide range of compositions [1] and Au-Yb at 1463 K at concentrations smaller than 50 at.% Yb [2]. The results demonstrate very large exothermal mixing effect and are substantially higher than the thermodynamic data for Cu-REM [3] and Ag-REM [4] melts examined earlier at the Institute for Problems of Materials Science (National Academy of Science of Ukraine). Standard formation enthalpies of solid phases in alloys of aurum with heavy REMs determined with calorimetric methods [5,6] also show too high negative values of ΔH f (from -70 to -93 kJ/mole).…”

“…partial molar mixing enthalpy for the i-th component; t is temperature relaxation time corresponding to the completion of dissolution; k is the heat-exchange coefficient determined in special calibration experiments[3,4]. The minus sign in the left-hand side of Eq.…”