Impurity diffusion measurements of Bi in liquid Sn using stable density layering and the shear cell technique

Suzuki, Shinsuke; Kraatz, Kurt Helmut; Frohberg, G.; Roşu-Pflumm, Raluca; Müller‐Vogt, G.

doi:10.1016/j.jnoncrysol.2007.05.075

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…Dimensionally, the total length of the 20 capillary segments is 60 mm and the diameter of the capillary is 1.5 mm. Both sizes are not randomly chosen, they coincide with the ones used to perform high precision measurements of macroscopic diffusion coefficients in molten metals and semi-conducting compounds during the past ESA -FOTON campaign [39][40][41][42][43][44][45]. Notice that the plane two-dimensional model of the real capillary used here allows an extensive parametric analysis because of the moderate computational costs of the approximation in comparison with full 3D simulations.…”

Section: ð1:dþmentioning

confidence: 99%

“…Also these thermal non-uniformities during freezing can introduce considerable concentration redistribution due to segregation. To prevent this kind of problems shear cells with mobile capillary segments, to separate the melt before the solidification, are widely used [38][39][40][41][42][43][44][45][46][47][48][49]. Shear cells also enable to consider especially difficult situations as, for instance, the homogenization before the diffusion phase starts in the case of polyphasic alloys or the management of two initial parts with a considerable difference in the melting points or with large volume expansion coefficients.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the accuracy of the interdiffusion measurements at low and moderate Rayleigh numbers. Some computational considerations

Ruíz

Pallarès

Grau

2010

International Journal of Heat and Mass Transfer

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Section: ð1:dþmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the accuracy of the interdiffusion measurements at low and moderate Rayleigh numbers. Some computational considerations

Ruíz

Pallarès

Grau

2010

International Journal of Heat and Mass Transfer

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“…Gravity and Marangoni convection disturb the experimental measurement of the diffusion coefficient. To minimize their disturbances, some methods were developed, including the shear cell technique [3] and the trilayer film technique. [4] Some investigations were carried out under a microgravity environment in space at a great cost.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Analysis of Temperature Dependence of Liquid Metal Diffusivity

Yang

Wang

et al. 2009

Metall Mater Trans A

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The diffusivities of liquid Al, Co, Mg, Ni, and Pb have been calculated with molecular dynamics (MD)-based on semiempirical potentials derived from the second-moment approximation to the tight binding method (TBM-SMA). The liquid structure in terms of pair distribution function described in the present work agrees well with the available experimental data. The diffusion coefficients derived agree well with a limited number of experimental measurements. The calculated diffusivities were also compared with the predictions of available diffusion models, including the activated state model, the moving oscillator model, the density fluctuation model, the free volume model, and the scaling law proposed by Dzugutov. The present work substantiates the density fluctuation model, suggesting that diffusivity D possesses a square proportionality of temperature T 2 . It is concluded that diffusion is materialized in liquid metals through continuous movements of individual atoms over a small distance as a result of local density fluctuations rather than through discrete jumps of atoms over an interatomic distance.

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“…[1][2][3][4][5][6] Experimental measurement of diffusivity is difficult because gravity-induced convection and Marangoni convection frequently negatively affect the accuracy of the experimental results. Moreover, the diffusivity is often deduced indirectly from a measured quantity such as a concentration profile, which has a low degree of accuracy.…”

Section: Introductionmentioning

confidence: 99%

A New Equation for Temperature Dependent Solute Impurity Diffusivity in Liquid Metals

Yang

Wang

et al. 2010

J. Phase Equilib. Diffus.

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An equation to predict the temperature dependence of solute impurity diffusivity in liquid metals has been derived by combining the Sutherland-Einstein formula with Kaptay's unified equation on the dynamic viscosity of liquid metals. It has been demonstrated that consideration of the temperature dependence of the atomic radius of the diffusing species results in better agreement of the predicted diffusivities with the experimental data compared to when the temperature independent Goldschmidt atomic radius is used. Due to the simple-parameter nature of the equation, it could be very useful in predicting the solute impurity diffusivity in liquid metal when experimental data are scarce.

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Impurity diffusion measurements of Bi in liquid Sn using stable density layering and the shear cell technique

Cited by 9 publications

References 10 publications

On the accuracy of the interdiffusion measurements at low and moderate Rayleigh numbers. Some computational considerations

On the accuracy of the interdiffusion measurements at low and moderate Rayleigh numbers. Some computational considerations

Molecular Dynamics Analysis of Temperature Dependence of Liquid Metal Diffusivity

A New Equation for Temperature Dependent Solute Impurity Diffusivity in Liquid Metals

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