Ag-Cu-Te Phase Equilibria Isothermal Sections at 600 °C and 400 °C.

Despite its importance, the Ag-Cu-Te system's phase diagram remains poorly understood. This study addresses this gap by investigating the equilibrium phases in equilibrated Ag-Cu-Te alloys. Combining these experimental results with existing literature and the phase diagrams of the Ag-Cu, Ag-Te, and Cu-Te binary systems, the isothermal sections of the Ag-Cu-Te ternary phase equilibria at 600 °C and 400 °C are proposed. The phase diagrams of the binary systems, Ag-Te and Cu-Te, were reassessed. In the Ag-Te binary system, there are three compounds, Ag₂Te, Ag_1.9Te, and Ag₅Te_3. There are three binary compounds, Cu₂Te, Cu₃Te₂, and CuTe, in the binary Cu-Te system. Ag and Cu whiskers were discovered along the Cu-Cu₂Te-Ag₂Te-Ag section, which prevented the determination of phase equilibria results in this region. One ternary compound, AgCuTe, was identified in the system. There are six and nine three-phase regions at 600 °C and 400 °C, respectively. There are limited Ag solubilities in the Cu₃Te₂ and CuTe phases. [ABSTRACT FROM AUTHOR]