Phase equilibria of the Zn–Bi–Ni system at 600 °C and 750 °C

The 600 °C and 750 °C isothermal sections of the Zn–Bi–Ni ternary system have been determined experimentally using scanning electron microscopy coupled with energy dispersive X-ray spectroscopy and X-ray diffraction. Three three-phase regions exist in the isothermal section at 600 °C and 750 °C, respectively. The Ni–Zn phases are all in equilibrium with the liquid phase in these two isothermal sections. There is a four-phase equilibrated reaction occurred between 450 °C and 600 °C, namely β1 + NiBi ⇔ L + α-Ni, but more experimental works are needed for obtaining the accurate equilibrated reaction temperature. Experimental results show that Bi is almost insoluble in any Ni–Zn compounds and α-Ni. The solid solubility of Zn in the NiBi phase is also limited.