Thermodynamic properties of Ni-IVb-metal binary melt systems

摘要

Integral and parcial mixing enthalpies of Ni-Zr (Hf) binaiy melt systems have been measured by isoperibolic calorimetry at 1770 + 5 K. Liquid Ni-Zr (Hf) alloys are characterized by exothermic heat effect. By means of analysis of property and literature data the temperature dependence of mixing enthalpies of binary melts Ni-Zr and Ni-Hf were determined. By Shreder equation the activities of components of Ni-Ti (Zr,Hf) melts has been found. It was shown that for Ni-Zr melts quantitative and for Ni-Ti (Hf) - qualitative agreement beetween experimental and calculated activities are observed, AG and AS of Ni-IVb melts systems has been calculated.