Experimental thermodynamics, surface and transport properties of liquid Ag-Ge alloys

Delsante, S.; Borzone, G.; Novaković, R.

doi:10.1016/j.tca.2019.178432

Cited by 6 publications

(7 citation statements)

References 38 publications

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“…Generally, the mixing behaviour of the constituent atoms classifies liquid binary mixtures into two main groups, i.e., phase separating (demixing) or compound forming (short-range ordered), and within the two groups, the atomic interactions are either strongly repulsive or strongly attractive. There are a limited number of alloy systems exhibiting the characteristics of both groups, for example, Ag-Sb and Ag-Ge [43]. Concerning the limiting cases of mixing, the first one indicates that the attractive forces between similar atoms are much greater than those between dissimilar atoms, and the formation of self-coordinated A-A or B-B pairs takes place leading to demixing and phase separation [24,41].…”

Section: Thermodynamics and Surface Properties Of Metallic Melts Repr...mentioning

confidence: 99%

“…To this aim, the self-aggregating model (SAM) and compound formation model (CFM), respectively, were applied. To evaluate the deviations of the two limiting cases of mixing with respect to the mixing behaviour described by the regular solution model, the quasi chemical approximation for regular solution (QCA) was also used [8,11,41,[43][44][45]. In order to describe the molar volume and viscosity, the thermodynamic models are the most appropriate [20].…”

Section: Thermodynamics and Surface Properties Of Metallic Melts Repr...mentioning

confidence: 99%

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Thermophysical Properties of Fe-Si and Cu-Pb Melts and Their Effects on Solidification Related Processes

Novaković

Giuranno

Mohr

et al. 2022

Metals

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Among thermophysical properties, the surface/interfacial tension, viscosity, and density/molar volume of liquid alloys are the key properties for the modelling of microstructural evolution during solidification. Therefore, only reliable input data can yield accurate predictions preventing the error propagation in numerical simulations of solidification related processes. To this aim, the thermophysical properties of the Fe-Si and Cu-Pb systems were analysed and the connections with the peculiarities of their mixing behaviours are highlighted. Due to experimental difficulties related to reactivity of metallic melts at high temperatures, the measured data are often unreliable or even lacking. The application of containerless processing techniques either leads to a significant improvement of the accuracy or makes the measurement possible at all. On the other side, accurate model predicted property values could be used to compensate for the missing data; otherwise, the experimental data are useful for the validation of theoretical models. The choice of models is particularly important for the surface, transport, and structural properties of liquid alloys representing the two limiting cases of mixing, i.e., ordered and phase separating alloy systems.

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Section: Thermodynamics and Surface Properties Of Metallic Melts Repr...mentioning

confidence: 99%

Section: Thermodynamics and Surface Properties Of Metallic Melts Repr...mentioning

confidence: 99%

Thermophysical Properties of Fe-Si and Cu-Pb Melts and Their Effects on Solidification Related Processes

Novaković

Giuranno

Mohr

et al. 2022

Metals

Self Cite

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“…phase separating (demixing) or compound forming (shortrange ordered) and within the two groups, the atomic interactions are either strongly repulsive or strongly attractive. There are a limited number of alloy systems exhibiting the characteristics of both groups, such as for example Ag-Sb and Ag-Ge [43]. Concerning the limiting cases of mixing, the first one indicates that the attractive forces between similar atoms are much greater than those between dissimilar atoms and, the formation of selfcoordinated A-A or B-B pairs takes place leading to demixing and phase separation [24,41].…”

Section: Thermodynamics and Surface Properties Of Metallic Melts Representing Phase Separation And Strong Compound Forming Tendencymentioning

confidence: 99%

“…Equation (13) where 𝑀𝑀 𝐴𝐴 , 𝑀𝑀 𝐵𝐵 are the molar masses of components 𝐴𝐴 and 𝐵𝐵 and 𝜌𝜌 𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴 is the alloy density. The excess quantities are characteristics of real alloy systems [20,41,43]. Therefore, the excess volume can be calculated by…”

Section: Density / Molar Volumementioning

confidence: 99%

“…The lack of such experimental data can be compensated by the model predicted data that may give information on the nature of mixing and degree of order in a melt in terms of the two microscopic functions, i.e. the concentration-concentration structure factor in the long wavelength limit 𝐹𝐹 𝑐𝑐𝑐𝑐 (0) and Warren-Cowley short-range order parameter 𝛼𝛼 1 (or chemical short-range order parameter, CSRO) [8,21,24,41,[43][44][45]. To this aim, the knowledge of the thermodynamic functions of mixing is required.…”

Section: Structural Information: 𝐹𝐹 𝑐𝑐𝑐𝑐 (0) and 𝛼𝛼 1 Microscopic Functionsmentioning

confidence: 99%

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Thermophysical properties of metallic melts and their effects on solidification related processes

Novaković¹,

Giuranno²,

Mohr³

et al. 2022

Preprint

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Among the thermophysical properties, the surface / interfacial tension, viscosity and density / molar volume of liquid alloys are the key properties for the modelling of microstructural evolution during solidification. Therefore, only reliable input data can yield accurate predictions preventing the error propagation in numerical simulations of solidification related processes. Due to experimental difficulties related to reactivity of metallic melts at high temperatures, the measured data are often unreliable or even lacking. The application of containerless processing techniques either leads to a significant improvement of the accuracy or makes the measurement possible at all. On the other side, accurate model predicted property values could be used to compensate the missing data; otherwise, the experimental data are useful for the validation of theoretical models. The choice of models is particularly important for the surface, transport and structural properties of liquid alloys representing the two limiting cases of mixing, i.e. ordered and phase separating alloy systems. To this aim, the thermophysical properties of the Fe-Si and Cu-Pb systems were analysed and the connections with the peculiarities of their mixing behaviours are highlighted.

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Surface and transport properties of liquid Bi–Sn alloys

Giuranno

Novaković

2020

J Mater Sci: Mater Electron

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Experimental thermodynamics, surface and transport properties of liquid Ag-Ge alloys

Cited by 6 publications

References 38 publications

Thermophysical Properties of Fe-Si and Cu-Pb Melts and Their Effects on Solidification Related Processes

Thermophysical Properties of Fe-Si and Cu-Pb Melts and Their Effects on Solidification Related Processes

Thermophysical properties of metallic melts and their effects on solidification related processes

Surface and transport properties of liquid Bi–Sn alloys

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