Studying the Viscosity of Liquid Aluminum-Nickel Alloys

Temperature and concentration dependences of the viscosity of melts of the Al-Ni system are obtained experimentally in a wide range of temperatures (from liquidus to 1700?) and concentrations (nickel content, 0 to 100 at %). The temperature dependences of the viscosity obtained in the heating and cooling modes coincide, and there is no hysteresis. Viscosity isotherms have a nonmonotonic form with maximum values at nickel contents of 50-65 at % and a minimum at 85 at %. The nonmonotonic viscosity isotherms of liquid alloys are explained by a change in the type of short-range ordering in a melt upon a change in concentration.

Automated summary

The temperature and concentration dependence of the viscosity of Al-Ni system melts were experimentally obtained, covering a wide range of temperatures (from liquidus to 1700°C) and concentrations (0 to 100 at % of nickel content). The viscosity was found to exhibit a nonmonotonic behavior with maximum values at 50-65 at % of nickel content and a minimum at 85 at %. This nonmonotonic viscosity can be explained by a change in the short-range ordering type in the melt upon varying the concentration.