Thermodynamic Description of the Al–X (X = S, Se, Te) Systems

Abstract

Thermodynamic modeling of the Al–X (X = S, Se, Te) binary systems was performed by means of the CALPHAD method. The solution phases, i.e., (Al), (αS), (βS), (Se), and (Te), were described using a substitutional solution model, and the intermetallic compounds, i.e., αAl2S3, γAl2S3, AlS, Al2Se3, AlTe, αAl2Te3, βAl2Te3, and Al2Te5, as stoichiometric compounds due to the narrow homogeneity ranges. A set of thermodynamic parameters describing the Al–X (X = S, Se, Te) binary systems was obtained. The calculated results for the phase equilibria and thermodynamic properties agree well with literature data.