Podoprygora N. ThermodynamicProperties of Ternary Alloys Ni-Al-Ti (Zr, Hf) and Binary Boundary systems

The disertation is devoted to measuring the mixing enthalpies of liquid Al-Hf, Ni-Al-Ti (Zr, Hf) alloys by high-temperature isoperibolic calorimetry at 1770±5-1790±5 К. All investigated alloys of ternary systems are characterized by exothermic mixing heat effects. Integral enthalpies of mixing in ternary Ni-Al-IVb-metal liquid alloys were calculated by Toop and Bonnier-Caboz models. The best correlation is established between experimental enthalpies of mixing and those predicted by Bonnier-Caboz method. This agreement testifies that thermodynamics of ternary alloys is predominantly defined by interaction between components in the boundary binary systems. The possibility of amorphous alloys formation was estimated using of glass-forming tendency (GFT) criterion adapted to ternary alloys. Computed GFT satisfactory predicts field of amorphous alloys existence, which correlate with experimental established.