Thermodynamics of formation of aluminum–iron–germanium amorphous alloys

• Published in: Journal of non-crystalline solids Vol. 333; no. 2; pp. 194 - 198
• Main Authors: Kanibolotsky, D.S., Lisnyak, V.V.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.2004; Elsevier
• Subjects: Applied sciences; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Metals. Metallurgy; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase diagrams of metals and alloys; Physics; T170; 82.60; L150; A150; 61.25.Mv; 07.20 Fw; 65.50; Temperature dependence; Phase diagrams; Heat of mixing; Amorphization; Ternary alloys; Amorphous alloy; Iron alloys; Electromotive force; Experimental study; Specific heat; Germanium alloys; Aluminium alloys; Calorimetry; Thermodynamic properties
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2003.09.054

Thermodynamic properties of ternary liquid Al–Fe–Ge alloys were studied by electromotive force method at 1050–1250 K and by high-temperature isobasic calorimetry at 1740 ± 5 K. The heat capacity change at ternary alloy formation (Δ mix C p) was estimated using the temperature dependence of integral enthalpy of mixing. Thermodynamics of the formation of Al–Fe–Ge amorphous alloys was evaluated by extrapolation of thermodynamic functions of mixing to the temperature of amorphization. The process of glass forming is preferable by both enthalpy and entropy for compositions of (0.1< x Fe<0.6, x Ge<0.5). The area with most negative integral Gibbs free energy and enthalpy of amorphous alloy formation corresponds well to the area of amorphization estimated by a glass-forming tendency (GFT) criterion.