Abstract
The thermodynamic, structural, surface and transport properties of In-Tl binary liquid alloy are studied on the basis of theoretical analysis using the regular solution model at different temperatures. The properties of the alloy at 723 K have been computed by estimating the best fit value of order energy parameter (ω) in the entire range of concentration to match their observed and theoretical values. The values of order energy parameter at different temperatures have been calculated using the value of order energy parameter at 723 K which played key role to study different properties of the alloy using optimization method. The theoretical analysis gives the positive energy parameter (ω), which is found to be temperature dependent.
Highlights
Various properties, such as hardness, corrosion resistance, wear resistance, mechanical strength, and fatigue strength, melting and boiling temperatures etc. of an alloy are different from its individual components
The thermodynamic, structural, surface and transport properties of In-Tl binary liquid alloy are studied on the basis of theoretical analysis using the regular solution model at different temperatures
The computed and observed values [24] of free energy of mixing are in good agreement in the entire concentration range. Both the computed and observed value of free energy of mixing are minimum at CTl = 0.5, which indicates that In-Tl alloys in liquid state at 723 K is symmetric at equiatomic composition
Summary
Various properties, such as hardness, corrosion resistance, wear resistance, mechanical strength, and fatigue strength, melting and boiling temperatures etc. of an alloy are different from its individual components. There is complexity in determining the properties of liquid alloys due to lack of long range atomic order. It is a shape memory alloy [13] having low melting temperature (fusible alloy). The interaction energy is considered as input parameter and is determined by fitting observed free energy of mixing at different concentrations. The expression for free energy of mixing (GM) can be derived on the basis of regular soultion model It is given as [14]. The term c (1− c) ⋅ω represents the heat of mixing in the frame work of regular solution model, i.e. The activity aA of the element A in the binary alloys A-B is given by the standard relation.
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