On the binary (Cu + Si) system: Thermodynamic modelling of the phase diagram and atomic mobility in face centred cubic phase

A new thermodynamic description of the binary (Cu + Si) system is proposed based on available experimental data. According to the newest information, the phases δ and γ were treated as phases with a polymorphic transformation at T = 1008 K. The polymorphic transformation of the η phase was also modelled. The liquid phase was described by the associated solution model. Besides optimization of the phase diagram and thermodynamic function, the atomic mobility in a face centred cubic lattice was assessed. Good agreement between calculations and experimental results was found.

► New experimental data about Cu-rich side were used for optimization. ► The liquid phase was modeled by associate solution model. ► Polymorphic transformations of the intermetallics compounds were modeled. ► Atomic mobilities in face centred cubic lattice were modeled.