A New Model for the Configurational Entropy of Mixing in Liquid Alloys Based on Short-Range Order
A new model has been developed to calculate the configurational entropy of mixing in liquid alloys involving consideration of chemical and topological short-range order. The entropy of mixing for an equiatomic random mixture was naturally reached by this model. The application of this
model to both hypothetic and real binary liquid alloys demonstrated that the chemical short-range order always decreased the configurational entropy of mixing, whereas complicated behavior was found with the atomic size effect. The configurational entropy of mixing increased when the larger
atoms entered into the matrix of the smaller atoms, whereas it decreased when the smaller atoms were mixed into the matrix of the larger atoms. The maximum of the configurational entropy of mixing was not located at the eutectic composition in these alloys.
Keywords: Configurational entropy of mixing; Liquid alloy; Short-range order
Document Type: Research Article
Publication date: 15 July 2012
- Acta Physico-Chimica Sinica, founded in 1985, is sponsored by the Chinese Chemical Society and organized by the College of Chemistry and Molecular Engineering, PekingUniversity. Since 1997, Acta Physico-Chimica Sinica has been indexed in SCI of ISI (US). Acta Physico-Chimica Sinica is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and material physical chemists. Manuscripts that are essentially reporting data, applications of data, or reviews of the literature are not suitable for publication in Acta Physico-Chimica Sinica.
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