Assessment of size effect on the surface properties of some binary liquid alloys

Anusionwu, B. C.; Akinlade, O.; Hussain, L. A.

doi:10.1016/s0925-8388(98)00530-1

Cited by 29 publications

(17 citation statements)

References 13 publications

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“…In order to compare the behavior of concentration-concentration fluctuations and Warren-Cowley short rang order parameter in the bulk and at the surface of the alloys, we need an expression for determination of concentrationconcentration fluctuations and warren-Cowley short rang order parameter at the surface. On the basis of earlier works of Singh et al in ref (Singh & Sommer, 1992) for the bulk phase, an expression for concentration-concentration fluctuations at the surface obtained via solving the surface grand partition function is given by (Singh & Sommer, 1992;Anusionwu et al, 1998) s s s cc s s s…”

Section: Surface Propertiesmentioning

confidence: 99%

“…For the material preparation of metal alloys, the understandings of mixing properties of liquid alloys are important. Several theoretical models (Anusionwu et al, 1998;Prasad et al, 1998;Akinlade et al, 2002;Novakovic, 2010;Kumar et al, 2013;Koirala et al, 2013;Singh et al, 2014) have long been proposed to understand the thermodynamic, structural, transport and surface properties of binary liquid alloys. The computational models for the calculation of band structure calculations for binary, ternary and quaternary alloys have also proposed by various authors (Pandey et al, 2014;Poudel & Kaphle, 2016;Kaphle et al, 2012Kaphle et al, & 2015Pandey & Kaphle, 2017;Ghimire et al, 2016;Sharma and Kaphle, 2017;Sedhain and Kaphle, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Chemical Ordering of Ag-Au Alloys in the Molten State

Koirala

2018

J. Inst. Sci. Tech.

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Simple statistical model has been used to report the thermodynamic, structural, transport and surface properties of liquid Ag-Au alloys at 1350K. In thermodynamic properties we have studied the free energy of mixing, heat of mixing, entropy of mixing and the chemical activity of both components of the alloys. For the structural investigation, our study includes concentration fluctuation in long wave length limit and Warren-Cowley short range order parameter. Viscosity and diffusivity of the alloys have been studied to understand transport properties. The surface behavior has been analyzed by computing surface concentration and surface tension of the alloys. The structural behaviors of the alloys are found to be symmetric with respect to concentrations of the species. The computed results are in good agreement with experimental data. Positive deviation of viscosity isotherms from linear law is observed. Surface tension of the alloys is found to be smaller than ideal values throughout bulk concentration of silver. For all theoretical analysis, concentration independent energy parameter takes important role, which is found to be temperature dependent and finally analysis confirms that presented alloy is hetero-coordinated.

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Section: Surface Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemical Ordering of Ag-Au Alloys in the Molten State

Koirala

2018

J. Inst. Sci. Tech.

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“…Transport properties: diffusion and viscosity Essentially, viscosity and diffusion measurements are employed by theoreticians as well as experimentalists to extract information about alloying or atomic association in liquids as they shed light on the understanding of the mixing behavior and can be used to ascertain the stoichiometric composition of associates that are formed (Singh & March 1995, Anusionwu et al 1998, Novakovic et al 2004. With a view to investigate the effect of size on the transport properties of the alloys of present interest we have attempted to calculate their ratio of the mutual and self diffusion coefficients, D M /D S (or D M /D id ) as well as their viscosities using Darken's thermodynamic equation of diffusion as given by Novakovic et al (2004) and the model of Singh and Sommer (1998) against concentration of the species) suggest the presence of maximum chemical order in the liquid alloy system and the composition of the most probable associates to be formed in the liquid phase (Novakovic et al 2004).…”

Section: Formalismmentioning

confidence: 99%

Size Sensitive Transport Behavior of Liquid Metallic Mixtures

Singh

Koirala

2015

J. Inst. Sci. Tech.

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We have used a formalism that connects thermodynamic and transport properties. The formalism has been used to calculate the Gibb's free energy of mixing, concentration fluctuations in the long wavelength limit, diffusion coefficients and viscosity in Cu-Tl, Cu-Pb and Sn-Tl binary liquid alloys at 1573K, 1473K and 723K respectively with aid of size effect and no size effect. Our calculations show that appreciable size ratio has more effects on the transport properties as compared to thermodynamic properties of homo-coordinated liquid alloys Cu-Tl, Cu-Pb and Sn-Tl.

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“…There has been considerable interest of theoreticians to explain the concentration dependent asymmetry in the properties of mixing of binary liquid alloys and hence to extract additional structural or microscopic information. Present day, various theoretical models [Prasad et al,1991[Prasad et al, ,1998Singh et al, 1990Singh et al, ,1992Anusionwu et al,1998;Novakovic et al,2010;Akinlade et al, 2002;Jha et al, 2014;Guggenheim, 1952]. have been focused to study of the alloying behavior of alloys in the molten state.…”

Section: Introductionmentioning

confidence: 99%