Demixing tendencies in some Sn-based liquid alloys

Akinlade, O.; Boyo, A. O.; Ijaduola, B. R.

doi:10.1016/s0925-8388(99)00232-7

Cited by 18 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(12), D M is the mutual diffusion coefficient, D S is the self diffusion coefficient and S cc (0) is the concentration-concentration fluctuations in the long wavelength limit (Eq. (8)).…”

Section: Darken's Equation For Diffusion and Empirical Formalism For mentioning

confidence: 99%

“…Hence, we have extended our investigation of effects of temperature on the properties of Zn-Cd liquid alloys, to investigate effects of temperature on two of its transport properties, namely diffusivity and viscosity, using Eqs. (12) and (14), respectively. The results obtained are shown in Figs.…”

Section: Surface Properties Modelmentioning

confidence: 99%

“…To investigate the temperature dependence of the bulk properties of Zn-Cd liquid alloys, we opted for the self association model (SAM) [11] reputed for being an excellent theoretical recipe for calculating the thermodynamic properties of demixing binary liquid alloys, knowing that Zn-Cd system belongs to this group [9,[11][12][13][14][15], as it indicates its simple, eutectic type phase diagram [16,17]. A combination of the popular Darken's equation [18] and an empirical formalism for viscosity and diffusion coefficient of Singh and Sommer in [19] are employed in our study of the effects of temperature on the transport or dynamic properties.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature dependence of the bulk and surface properties of liquid Zn–Cd alloys

Awe

Azeez

2017

Appl. Phys. A

View full text Add to dashboard Cite

The effects of temperature on the bulk and surface properties of liquid Zn-Cd alloys have been theoretically investigated, using a combination of self association model, Darken's thermodynamic equation for diffusion, empirical model for viscosity and a statistical mechanics model. The results from this study show that change in temperature resulted in cross-over effects in bulk and surface properties. We also found that with an increase in temperature, a pronounced asymmetry of viscosity isotherm is significantly reduced, and viscosity isotherm exhibited anomalous behaviour. Our results reveal that the homocoordination tendency in Zn-Cd liquid alloys is not strong and reduces with increasing temperature. The study further suggests a pronounced segregation of Cd-atoms at the surface of Zn-Cd liquid alloys and the extent of segregation reduces with temperature. We as well found that, in addition to the reported understanding that size-factor determines the compositional location of asymmetry of the viscosity isotherm, temperature is an operating parameter that has effect, not only on the composition of asymmetry, but also on the magnitude of asymmetry. In all the properties investigated, the most pronounced effect of temperature (52.9%) is on the viscosity while the least effect (7.1%) is on the surface tension.

show abstract

“…(12), D M is the mutual diffusion coefficient, D S is the self diffusion coefficient and S cc (0) is the concentration-concentration fluctuations in the long wavelength limit (Eq. (8)).…”

Section: Darken's Equation For Diffusion and Empirical Formalism For mentioning

confidence: 99%

Section: Surface Properties Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temperature dependence of the bulk and surface properties of liquid Zn–Cd alloys

Awe

Azeez

2017

Appl. Phys. A

View full text Add to dashboard Cite

show abstract

“…Relevant applications of the model can be found in [7,10,21]. In the model, it is first assumed that the binary alloy consists of N A = x A N atoms of A and N B = x B N atoms of element B, so that the total number of atoms, N , is N = N A + N B .…”

Section: Model Descriptionmentioning

confidence: 99%

“…The associative tendency between unlike atoms in Fe-Pt and Ni-Pt alloys is strong, and therefore we have used the self-association model (SAM) [7,10,21] here. Various mixing properties such as the concentration dependence of the free energy of mixing, (G M /RT ); the thermodynamic activity, a i ; the concentration fluctuations, S cc (0), in the long-wavelength limit; the Warren-Cowley chemical short-range order (CSRO) parameter, α 1 ; and the chemical diffusion, D, have been observed to deviate negatively from the ideal results, and thus, both alloys belong to the class of liquid alloys that exhibits a preference towards heterocoordination (short-range ordering).…”

Section: Introductionmentioning

confidence: 99%

Investigation of ordering phenomenon in Me–Pt (Me=Fe,Ni) liquid alloys

Odusote

2008

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

The phase diagrams of Fe-Pt and Ni-Pt liquid alloy systems show the existence of FePt and NiPt intermetallic compounds, respectively, in their solid intermediate states, and the associative tendency between unlike atoms in these liquid alloys has been analysed using the self-association model. The concentration dependences of mixing properties such as the free energy of mixing, G M ; the concentration fluctuations, S cc (0), in the long-wavelength limits; the chemical short-range order (CSRO) parameter, α 1 ; as well as the chemical diffusion, enthalpy and entropy of the mixing of Fe-Pt and Ni-Pt liquid alloys have been investigated to determine the nature of ordering in the liquid alloys. The results show that heterocoordination occurs in the alloys at all concentrations. The effect of CSRO on S cc (0), chemical diffusion, D, and the order parameter, α 1 , has been considered. The ordering phenomenon in the liquid alloys is also related to the effect of the atomic size mismatch volume on S cc (0).

show abstract

Diffusion slowdown in the nanostructured liquid Ga‐Sn alloy

Podorozhkin

Charnaya

Lee³

et al. 2015

Annalen der Physik

View full text Add to dashboard Cite

The diffusion of gallium in liquid Ga-Sn alloy embedded into different porous silica matrices was studied by NMR. Spin relaxation was measured for two gallium isotopes, 71 Ga and 69 Ga, at two magnetic fields. Pronounced rise of quadrupole contribution to relaxation was observed for the nanostructured alloy which increased with decreasing the pore size. The correlation time of atomic mobility was evaluated and found to be much larger than in the relevant bulk melt which evidenced a pronounced diffusion slowdown in the Ga-Sn alloy under nanoconfinement. It is shown that the diffusion was slower by a factor of 30 for the alloy within 7 nm pores. The spectral densities of electric field gradients at zero frequency were found to double for the finest pores. The Knight shift was found to decrease but slightly for the nanostructured alloy.

show abstract

Demixing tendencies in some Sn-based liquid alloys

Cited by 18 publications

References 7 publications

Temperature dependence of the bulk and surface properties of liquid Zn–Cd alloys

Temperature dependence of the bulk and surface properties of liquid Zn–Cd alloys

Investigation of ordering phenomenon in Me–Pt (Me=Fe,Ni) liquid alloys

Diffusion slowdown in the nanostructured liquid Ga‐Sn alloy

Contact Info

Product

Resources

About