Thermodynamic description of the system Cu–Sn–P experimental and numerical investigation

Abstract

AbstractThe aim of the presented experimental and numerical investigation is to verify the ternary phase diagram Cu–Sn–P in the Cu-rich corner, especially the presence and position of the ternary eutectic transition point. Annealing experiments within a concentration gradient have been performed and compared to computational thermodynamics. The identification of phases and phase regions is based on differential thermal analysis, scanning electron and light microscopy. The discussed ternary eutectic transition in the Cu-rich corner is confirmed, phases and phase regions, as proposed by computational thermodynamics, are verified. In addition, the existence of the γ phase was confirmed but the ∊ phase was not found in the as-cast microstructures which decreases its importance for technical bronze alloys with Sn up to a mass fraction of 0.2.