Calorimetric investigation of liquid Al–Ga–Gd alloys

• Published in: Thermochimica acta Vol. 421; no. 1; pp. 111 - 115
• Main Authors: Kanibolotsky, Dmitry S., Golovataya, Nataliya V., Bieloborodova, Olena A., Lisnyak, Vladyslav V.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.11.2004; Elsevier Science
• Subjects: Aluminium; Calorimetry; Chemical thermodynamics; Chemistry; Ethalpy of mixing; Exact sciences and technology; Gadolinium; Gallium; General and physical chemistry; Metals and alloys; Thermodynamic properties; Gadolinium; Calorimetry; Gallium; Aluminium; Ethalpy of mixing; Ternary alloy; Heat of mixing; Aluminium alloy; Liquid alloy; Lanthanide compound; Gallium alloy; Thermal analysis; Thermodynamic properties; Gadolinium alloy
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2004.04.005

Partial for gadolinium and integral enthalpies of mixing were determined for liquid Al–Ga–Gd alloys using a high-temperature isoperibolic calorimeter at 1760±5 K. The experiments were performed along five sections with constant concentration ratios of Al and Ga in a range of 0.0≤ x Gd≤0.6. The resulted integral enthalpies of mixing were fitted by polynomial concentration dependences. The deviation between experimental and predicted by geometric model values of integral enthalpy of mixing was found to be 5.25%, so ternary interaction is negligibly small at the experimental temperature. It has been determined that ternary alloys thermodynamics is preferentially defined by influence of congruently melting binary GaAl 2 and GdGa 2 intermetallides.