Volume and Surface Properties of Tin-Containing Nickel Melts

The effect of impurities on the structural and physicochemical properties of melts is considered in order to improve the service properties of cast high-temperature alloys. The changes in the state of nickel melts depending on the tin impurity content and the temperature are studied using the parameters of such structurally sensitive properties as density and surface tension. When the tin content in nickel melts increases to several hundredths of a percent, their density and compression effect are found to increase; however, a further increase in the tin content to 0.6 wt % is accompanied by a significant decrease in these properties. A stable nickel-based cluster solution is shown to form when the density and the surface tension increase at 0.02 wt % tin. When the temperature increases to 1650°C, the properties of the melts are characterized by a slight decrease in the surface tension and the density at a retained type of dependences.