Experimental investigation of phase equilibria in Cu–Ge–Ti system

Phase relations in the Cu–Ge–Ti ternary system have been studied through alloy sampling using electron probe microscopy (EPMA), and X-ray diffraction (XRD) techniques. A new ternary phase, τ1, was detected at 923 K. In light of the characterized phases in the annealed alloys, isothermal sections of the Cu–Ge–Ti system were constructed, which consist of 20 and 15 three-phase regions at 923 and 1073 K, respectively. In addition, the third element has limited solubility in binary compounds. [Display omitted] •Phase relations of the Cu–Ge–Ti ternary system at 923 and 1073 K were established.•A new stable ternary phase τ1 was found and confirmed for the first time.•The third element shows limited solubility in all binary compounds.•The isothermal section of Cu–Ge–Ti system contains a large liquid region at 1073 K.