Thermodynamics Research Center / ThermoML | Thermochimica Acta

Thermodynamic properties of liquid Au-Cu-Sn alloys determined from electromotive force measurements

Guo, Z.[Zhongnan], Hindler, M.[Michael], Yuan, W.[Wenxia], Mikula, A.[Adolf]
Thermochim. Acta 2011, 525, 1-2, 183-9
ABSTRACT
The thermodynamic properties of the ternary Au-Cu-Sn system were determined with the electromotive force (EMF) method using a liquid electrolyte. Three different cross-sections with constant Au:Cu ratios of 3:1, 1:1, and 1:3 were applied to measure the thermodynamic properties of the ternary system in the temperature range between the liquidus temperature of the alloys and 1023 K. The partial free energies of Sn in liquid Au-Cu-Sn alloys were obtained from EMF data. The integral Gibbs free energy and the integral enthalpy at 900 K were calculated by Gibbs-Duhem integration. The ternary interaction parameters were evaluated using the Redlich-Kister-Muggianu polynomial.
Compounds
# Formula Name
1 Cu copper
2 Sn tin
3 Au gold
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 2
  • 1
  • 3
  • Solid-liquid equilibrium temperature, K ; Crystal
  • Mole fraction - 2; Crystal
  • Mole fraction - 3; Crystal
  • Pressure, kPa; Liquid
  • Crystal
  • Liquid
  • DTA
  • 24