Thermochemical and phase diagram studies of the Bi-Ni-Sn system

► We study the phase diagram Bi-Ni-Sn by using scanning electron microscopy and differential scanning calorimetry. ► The samples are positioned in 3 isopleths with constant Ni contents of 0.05, 0.10 and 0.15 mol fraction. ► It has been confirmed that a ternary eutectic reaction appears at around 116-129 °C. ► Experimental liquidus temperatures were obtained and compared to calculated ones. ► Six groups of thermal arrests were registered (except the eutectic and liquidus related peaks).