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MM: Fachverband Metall- und Materialphysik
MM 20: Poster session
MM 20.2: Poster
Dienstag, 27. März 2007, 14:45–18:00, Poster C
Enthalpy of Mixing in the Binary System Bi-In — •Andriy Yakymovych1, Stepan Mudry1, Christoph Luef2, and Herbert Ipser2 — 1Department of Metal Physics, Ivan Franko National University Lviv, UA-79005 Lviv, Ukraine — 2Department of Inorganic Chemistry/Materials Chemistry, University of Vienna, A-1090 Vienna, Austria
Bi-In alloys are widely used in manufacturing, for example to make fuel tank safety plugs, or in solders. From the scientific point of view this system is very interesting because of the existence of the intermetallic compounds BiIn, Bi3In5 and BiIn2. Transport properties in the liquid state show a deviation of the typical temperature dependence in low temperature regions and knowledge of the thermodynamic properties in the liquid state is very important for deeper understanding of the structure and bonding nature of the system. Most of the investigations of the enthalpy of mixing were made at higher temperatures, the measurement results at lower temperatures, in turn, show some disagreement.
Calorimetric studies of the enthalpy of mixing in the system Bi-In have been carried out at 483, 875 and 1023 K. The enthalpy of mixing is negative and shows a minimum at approximately 45 at.% Bi, what indicates a mutual interaction of both components in the alloys. The curve of enthalpy of mixing is asymmetric.