The literature data on the enthalpies of mixing and thermodynamic activities of Fe–Ti, Fe–Zr, and Fe–Hf liquid alloys are summarized. It is shown that the thermodynamic properties of these systems are characterized by significant negative deviations from the ideal behavior. In the framework of the associated solution model, the composition and temperature dependences of the thermodynamic functions of mixing for the Fe–Ti, Fe–Zr, and Fe–Hf systems are described. The temperature dependence of the thermodynamic properties of the considered systems is characterized by increase in negative deviations from the ideality with decreasing temperature and increasing thermodynamic stability of supercooled melts. Analysis of the degree of short-range order in the system melts, estimated as the total mole fraction of associates Σxass at the glass transition temperature, allows us to successfully interpret the known composition ranges of glass transition for the Fe–Zr and Fe–Hf melts and predict the composition range of glass transition for the Fe–Ti melts.
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Translated from Poroshkovaya Metallurgiya, Vol. 55, Nos. 11–12 (512), pp. 93–104, 2016.
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Agraval, P.G., Dreval, L.A. & Turchanin, M.A. Thermodynamic Properties of Iron Melts with Titanium, Zirconium, and Hafnium. Powder Metall Met Ceram 55, 707–716 (2017). https://doi.org/10.1007/s11106-017-9858-8
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DOI: https://doi.org/10.1007/s11106-017-9858-8