Simple model for demixing binary liquid alloys

Ram Nadan Singh, Ferdinand Sommer

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

A simple model has been proposed for demixing liquid alloys, where the existence of polyatomic self associates (clusters of like atoms) has been considered to investigate the large positive deviations of the thermodynamic functions. The concentration fluctuations [Scc (o)] in the long wavelength limit and the chemical diffusions (D) are found to be most sensitive, both as a function of concentration and temperature, above the miscibility gap. The role of the size of the self associates and its energetics with respect to large positive deviations in activity, excess free energy, entropy of mixing, heat of mixing, Scc (o) and D have been critically examined. The critical concentration and temperature are provided for different hypothetical demixing liquid alloys; application is made to Bi - Zn liquid alloys. The results of the model correspond to an optimized set of thermodynamic functions obtained by a least-squares method.

Original languageEnglish
Pages (from-to)533-540
Number of pages8
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Volume83
Issue number7
Publication statusPublished - Jul 1992

Fingerprint

liquid alloys
binary alloys
Liquids
Thermodynamics
deviation
thermodynamics
miscibility gap
least squares method
Free energy
Entropy
Thermodynamic properties
Solubility
free energy
entropy
heat
Wavelength
Atoms
Temperature
temperature
wavelengths

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Simple model for demixing binary liquid alloys. / Singh, Ram Nadan; Sommer, Ferdinand.

In: Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, Vol. 83, No. 7, 07.1992, p. 533-540.

Research output: Contribution to journalArticle

@article{ba40fd2fcbe34180a21e1e64fadf704d,
title = "Simple model for demixing binary liquid alloys",
abstract = "A simple model has been proposed for demixing liquid alloys, where the existence of polyatomic self associates (clusters of like atoms) has been considered to investigate the large positive deviations of the thermodynamic functions. The concentration fluctuations [Scc (o)] in the long wavelength limit and the chemical diffusions (D) are found to be most sensitive, both as a function of concentration and temperature, above the miscibility gap. The role of the size of the self associates and its energetics with respect to large positive deviations in activity, excess free energy, entropy of mixing, heat of mixing, Scc (o) and D have been critically examined. The critical concentration and temperature are provided for different hypothetical demixing liquid alloys; application is made to Bi - Zn liquid alloys. The results of the model correspond to an optimized set of thermodynamic functions obtained by a least-squares method.",
author = "Singh, {Ram Nadan} and Ferdinand Sommer",
year = "1992",
month = "7",
language = "English",
volume = "83",
pages = "533--540",
journal = "International Journal of Materials Research",
issn = "1862-5282",
publisher = "Carl Hanser Verlag GmbH & Co. KG",
number = "7",

}

TY - JOUR

T1 - Simple model for demixing binary liquid alloys

AU - Singh, Ram Nadan

AU - Sommer, Ferdinand

PY - 1992/7

Y1 - 1992/7

N2 - A simple model has been proposed for demixing liquid alloys, where the existence of polyatomic self associates (clusters of like atoms) has been considered to investigate the large positive deviations of the thermodynamic functions. The concentration fluctuations [Scc (o)] in the long wavelength limit and the chemical diffusions (D) are found to be most sensitive, both as a function of concentration and temperature, above the miscibility gap. The role of the size of the self associates and its energetics with respect to large positive deviations in activity, excess free energy, entropy of mixing, heat of mixing, Scc (o) and D have been critically examined. The critical concentration and temperature are provided for different hypothetical demixing liquid alloys; application is made to Bi - Zn liquid alloys. The results of the model correspond to an optimized set of thermodynamic functions obtained by a least-squares method.

AB - A simple model has been proposed for demixing liquid alloys, where the existence of polyatomic self associates (clusters of like atoms) has been considered to investigate the large positive deviations of the thermodynamic functions. The concentration fluctuations [Scc (o)] in the long wavelength limit and the chemical diffusions (D) are found to be most sensitive, both as a function of concentration and temperature, above the miscibility gap. The role of the size of the self associates and its energetics with respect to large positive deviations in activity, excess free energy, entropy of mixing, heat of mixing, Scc (o) and D have been critically examined. The critical concentration and temperature are provided for different hypothetical demixing liquid alloys; application is made to Bi - Zn liquid alloys. The results of the model correspond to an optimized set of thermodynamic functions obtained by a least-squares method.

UR - http://www.scopus.com/inward/record.url?scp=0026895742&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026895742&partnerID=8YFLogxK

M3 - Article

VL - 83

SP - 533

EP - 540

JO - International Journal of Materials Research

JF - International Journal of Materials Research

SN - 1862-5282

IS - 7

ER -