Thermophysical properties of Cu–In–Sn liquid Pbfree alloys: viscosity and surface tension

The viscosity of a few Cu–In–Sn liquid alloys has been
investigated by a number of geometric (Muggianu, Kohler,
Toop) and physical thermodynamic models (Kozlov–
Romanov–Petrov, Budai–Benko–Kaptay, Schick et al.) and
GSM for the cross section (z/y = 1/3) in Pb-free liquid alloy
Cux–Iny–Snz at 1073 K. Moreover, the surface tensions of the
same liquid alloys have been investigated by a number of
geometric models and the Butler model for the cross section
Cux–Iny–Snz (z/(y + z) = 0, 0.1, 0.3, 0.5, 0.7, 0.9, 1) at the same
temperature. The best agreement of the surface tensions was
obtained in the Kohler model for xCu = 10 at % and the Butler
model for xCu = 20 at % and xCu = 30 at.%, respectively. The best
agreement among chosen geometric and physical models
and experiment for these selected sections Cu80In15Sn5,
Cu75In15Sn10, Cu55In7Sn38, Cu33In50Sn17 and Cu26In55Sn19 at
1073 K was obtained for the Budai–Benkö–Kaptay model.