Determination of bulk and surface properties of liquid Bi-Sn alloys using an improved quasi-lattice theory
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Olugbenga Morayo Oshakuade
and
Oluseyi Ezekiel Awe
Abstract
The thermodynamic properties of Bi-Sn were studied at 600 and 900 K using a quasi-lattice theory. After successful fitting of Gibbs free energies of mixing and thermodynamic activities, the fitting parameters were used to investigate the enthalpy of mixing, the entropy of mixing, concentration fluctuations, Warren-Cowley short-range-order parameter, surface concentrations and surface tensions of the binary systems. Positive and symmetrically shaped enthalpies of mixing were observed in all composition range, while negative excess entropies of mixing were observed. Bi-Sn showed a slight preference for like-atoms as nearest neighbours in all composition range. The nature of atomic order in Bi-Sn at 600 and 900 K appeared similar. The highest tendency for homocoordination exists at composition where mole fraction of Bi is about 40%. It was also observed that Bi (whose surface tension is lower than that of Sn) has the highest surface enrichment in the Bi-Sn systems. Unlike many previous applications of the quasi-lattice theory where constant values were used to approximate coordination numbers, temperature and composition-dependent coordination numbers were applied in this work.
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Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Frontmatter
- Reviews
- Technology supporting green chemistry in chemical education
- Poly(glycerol sebacate) – a revolutionary biopolymer
- Non-radioactive imaging strategies for in vivo immune cell tracking
- Stereoselective organocascades: from fundamentals to recent developments
- Determination of bulk and surface properties of liquid Bi-Sn alloys using an improved quasi-lattice theory
- Molecular mechanics approaches for rational drug design: forcefields and solvation models
Articles in the same Issue
- Frontmatter
- Reviews
- Technology supporting green chemistry in chemical education
- Poly(glycerol sebacate) – a revolutionary biopolymer
- Non-radioactive imaging strategies for in vivo immune cell tracking
- Stereoselective organocascades: from fundamentals to recent developments
- Determination of bulk and surface properties of liquid Bi-Sn alloys using an improved quasi-lattice theory
- Molecular mechanics approaches for rational drug design: forcefields and solvation models
