Abstract
The integral molar enthalpies of mixing are described by drop calorimetry for liquid alloys based on the (Al+Li) and (Al+Li+Zn) system, with the use of the Setaram MHTC 96 Line Evo calorimeter.The measurements for the (Al+Li) system were carried out at two temperatures, 1023K and 1027K, and compared with the literature data. The integral molar enthalpies of mixing of the liquid binary system over the entire concentration range have negative values. Moreover, for the mole fraction of lithium (XLi=0.5053), the minimum value of the integral enthalpy of mixing of the (Al+Li) system is equal to ΔmixHm=−12.1kJ·mol−1.The experimental studies for the (Al+Li+Zn) system involved measurements at three different temperatures: 942K for the (Al0.90Li0.10)1−xZnx alloy composition; 978K for the (Al0.35Li0.65)1−xZnx and (Al0.65Li0.35)1−xZnx alloy composition and finally, 1014K for the (Al0.50Li0.50)1−xZnx alloy composition.This work presents a complete study of mixing enthalpies in (Al+Li) and (Al+Li+Zn) systems and may therefore provide reference for earlier attempts on calorimetric measurements of the (Al+Li+Zn) system.
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