Abstract

The partial and the integral enthalpies of mixing of liquid Si–Zr, Cu–Si–Zr, Ni–Si–Zr and Cu–Ni–Si–Zr alloys with mole fractions of zirconium in the range from 0 up to 30 at.% have been determined by high-temperature isoperibolic calorimetry at 1575–1720 K. The data of the constituent ternaries were described using a regular association model. The enthalpy of mixing of liquid and undercooled liquid Cu–Ni–Si–Zr alloys were estimated for all compositions on the basis of the model description of the constituent binary and ternary systems.

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