A CRITICAL THERMODYNAMIC EVALUATION OF THE SYSTEMS SI-ZN AND AL-SI-ZN

Thermodynamic evaluations of the systems Si-Zn and AI-Si-Zn are presen ted. In the evaluation of the system Al-Si-Zn, use is made of availabl e thermodynamic evaluations of the binary subsystems. The results of t he calculations are compared with published experimental data and cove r a temperature range of 400-1700 K. In these calculations, the vapour phase has been included. It is shown that the thermodynamic behaviour of the three elements can be explained by a summation of binary inter actions between the elements. The calculations in the ternary system a re performed using ''Txy-Calc''. A short outline of the ''two dimensio nal phase mapping'' method used in this program is given.