Phase equilibria study and characterization of the alloys in the BiCu0.5Ni0.5 section of the Bi-Cu-Ni system

The Bi-Cu-Ni system is a very significant, because its alloys belong to the group of potential Cu-Ni-based advanced lead-free solder materials for high temperature application. The results of phase equilibria investigation and characterization of the alloys selected in the Bi-Cu0.5Ni0.5 section from bismuth corner with molar ratio Cu:Ni = 1:1, are presented in this paper. The investigations were performed using different experimental methods - DTA, DSC, SEM-EDS, hardness and electrical conductivity measurements, while thermodynamic calculation was done according to the CALPHAD method using PANDAT software.