The knowledge of the phase diagram of the Al–Ge–Zn ternary system is of importance in the development of high temperature soldering materials. In this study, the phase diagram of the Al–Ge–Zn ternary system was calculated by the calculation of phase diagrams method using binary thermodynamic parameters included in the COST MP0602 thermodynamic database. Chosen alloys with compositions along two vertical sections with molar ratio Al/Ge = 3/1 and 1/3 were measured using DTA (differential thermal analysis). The experimentally determined phase transition temperatures from this work and phase equilibria data from literature were compared with calculation results and good mutual agreement was noticed.
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