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Thermodynamics of liquid Li-Sb alloys - Experiment vs modeling
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. Polish Acad Sci, Inst Met & Mat Sci, Krakow, Poland.
Polish Acad Sci, Inst Met & Mat Sci, Krakow, Poland..
Polish Acad Sci, Inst Met & Mat Sci, Krakow, Poland..
2019 (English)In: Journal of Chemical Thermodynamics, ISSN 0021-9614, E-ISSN 1096-3626, Vol. 128, p. 134-140Article in journal (Refereed) Published
Abstract [en]

Thermodynamic properties of liquid Li-Sb alloys have been studied both experimentally and theoretically. Electromotive force measurements (EMF) in the Li-Sb system were performed over broad range of temperature and lithium concentrations. It was found that in liquid Sb-rich alloys (x(Sb) >= 0.85) the EMF increases with increasing temperature as opposite to liquid alloys of lower Sb content (0.4 <= xSb < 0.85). Based on the present experiment results and literature data a new thermodynamic description of the liquid Li-Sb phase was developed using associate and sub-regular models. Very good agreement between experiment and new modeling data using associate model are observed. Importance of Li3Sb intermetallic compound has been tested and proved in order to have a proper description of thermodynamic and structural properties of Li-Sb liquid alloys by comparing sub-regular with associate model data. Chemistry of short-range atom ordering has been qualified and quantified at whole Sb concentration range by using Bhatia-Thornton formalism and Warren-Cowley parameter, respectively. Significant degree of chemical ordering at Li-rich alloys has been found resulted from Li3Sb compound existence in comparison to its depletion at Sb-side where liquid Li-Sb alloys display the tendency to random atoms ordering.

Place, publisher, year, edition, pages
Academic Press, 2019. Vol. 128, p. 134-140
Keywords [en]
Liquid Li-Sb alloys, Sub-regular model, Associate model, Activity, Partial thermodynamic functions, CSRO
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-237080DOI: 10.1016/j.jct.2018.08.008ISI: 000446481000016Scopus ID: 2-s2.0-85051666194OAI: oai:DiVA.org:kth-237080DiVA, id: diva2:1258174
Note

QC 20181024

Available from: 2018-10-24 Created: 2018-10-24 Last updated: 2018-10-24Bibliographically approved

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