N. David et al., The enthalpy of mixing in the quaternary (Al, Ga, Sn, Zn) system: Calorimetry measurements and Redlich-Kister modelling, Z METALLKUN, 91(1), 2000, pp. 51-56
The enthalpy of mixing of the (Ga, Sn, Zn) liquid phase has been explored a
t 715 K by Calvet drop calorimetry. Following the three isopletic cuts x(i)
= x(j) we have determined the ternary term of a fifth order Redlich-Kister
model. An exploration of the quaternary (Al, Ga, Sn, Zn) system along the
two isoplethic cuts x(Ga) = x(Sn) = x(Zn) and x(Al) = x(Ga) = x(Zn) has bee
n realized too. A Redlich-Kister polynom established for this quaternary sy
stem was extrapolated up to the ternary (Al, Sn, Zn) border system which re
mains inaccessible to calorimetry with an open crucible. A Darken quadratic
model based on a statistical Bragg-Williams description of the (Al, Sn, Zn
) liquid phase is compared to this calorimetry extrapolation.