Enthalpies of mixing of liquid systems for lead free soldering: Al-Cu-Sn system

► First paper providing enthalpy of mixing determined by calorimetry for Al-Cu-Sn. ► Comparative discussion of values derived from KEMS data published before. ► Enthalpy of mixing at 1000 °C described for the entire ternary system Al-Cu-Sn. ► New experimental enthalpy of mixing values for the binary Al-Cu system.