Abstract
Shear viscosity measurements were performed for liquid Co–Sn alloys over a wide temperature range above the respective liquidus temperatures. A high temperature oscillating-cup viscometer was used. It was found experimentally that viscosity as a function of temperature obeys an Arrhenius law. The data were compared with calculated values, obtained from different thermodynamic approaches. A good agreement was found between experimental results and calculated ones by the Budai–Benkö–Kaptay model.
Highlights
Viscosity is one of the most important transport properties of materials in the liquid state
Taking into account this type of interatomic interaction, Ivanov [15] calculated the enthalpy of mixing for liquid Co–Sn alloys based on the association theory
A temperature dependence of this type is often found for the viscosity in melts of simple metals, if the properties of the melt can be well described by a hard-sphere model [32]
Summary
Viscosity is one of the most important transport properties of materials in the liquid state. The reason of using intermetallic Co–Sn compounds is the reversible mechanism, in which nanosized cobalt forms Such type materials act as a spectator upon the lithiation/delithiation reaction and supports electronic contact in the material for better cycling performance. The preferable interaction between unlike kind atoms for the Co–Sn system is displayed in negative values of the enthalpy of mixing, structure studies in the solid as well as liquid state. Taking into account this type of interatomic interaction, Ivanov [15] calculated the enthalpy of mixing for liquid Co–Sn alloys based on the association theory. The obtained experimental data are compared with thermodynamic models, calculated from different approaches [22,23,24,25] at a constant temperature of 1773 K, as well as with literature data
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