Kinetics-dominated interdiffusion in metallic glass-forming liquids

Yang, Fan; Heintzmann, P.; Kargl, Florian; Binder, Kurt; Nowak, Benedikt; Schillinger, B.; Voigtmann, Thomas; Meyer, Andreas

doi:10.1103/physrevb.98.064202

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…With these data some long standing issues could be addressed, e.g. the temperature dependence of self diffusion around the melting point [2,3], the relation of viscous flow and atomic diffusion [4,5], the relation of self-and interdiffusion [6][7][8], and the onset of glassy dynamics in viscous metallic melts [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…This leads to systematic errors that can be as large as several 100% [20]. Beside a time-resolved measurement of the diffusion process, a sufficiently large difference in density of the diffusion couple can suppress convective flow and, hence, is a prerequisite for accurate measurements [6][7][8]. However, this can not be realized for tracer diffusion into an homogenous liquid, as has been done in [16,19] and it does not apply to one-component liquids: in liquid Cu, self-diffusion coefficients measured with quasielastic neutron scattering [21] are significantly smaller than those from previous long-capillary tracer experiments [22].…”

Section: Introductionmentioning

confidence: 99%

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Iron self diffusion in liquid pure iron and iron-carbon alloys

Meyer

Hennig

Kargl

et al. 2019

J. Phys.: Condens. Matter

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With incoherent quasielastic neutron scattering self-diffusion coefficients in pure iron, and iron-carbon alloys containing 8.7 at% and 16.9 at% carbon have been measured. At the melting point in liquid iron is m2 s−1. For the close-to-eutectic Fe83.1C16.9 composition m2 s−1 at T K. Contradicting conclusions drawn from literature values of tracer diffusion experiments the addition of carbon has only a minor effect on the iron mobility: at a given temperature the self-diffusion coefficient in Fe83.1C16.9 is only 10% larger than in liquid iron, although mixing has a drastic effect on liquidus temperature and phase behavior.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Iron self diffusion in liquid pure iron and iron-carbon alloys

Meyer

Hennig

Kargl

et al. 2019

J. Phys.: Condens. Matter

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“…As the setup has to be x-ray transparent, high-temperature stable, and no reaction between furnace and sample should occur, mainly alumina (Al 2 O 3 ) is used as construction material. The design of the here presented furnace is based on a setup for interdiffusion measurements in liquid alloys which proved to have a homogeneous radial temperature distribution [35]. This is necessary because radial temperature differences could lead to buoyancy-driven convection [36,37].…”

mentioning

confidence: 99%

In situ Measurement of Thermodiffusion in Liquid Alloys

2019

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Temperature gradients can change the concentration distribution in multicomponent materials. This cross-coupling effect of heat and mass transfer is difficult to measure in liquid alloys. We present a new method using x-ray radiography in combination with a high temperature furnace to measure thermodiffusion in melts time and space resolved. This greatly improves the process control and allows us to determine diffusion and thermodiffusion simultaneously. In a first experiment we demonstrate that in liquid Al 78.5 Ni 21.5 the component nickel diffuses to the cold end of the sample with a Soret coefficient on the order of 10 −3 K −1 .

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A new analysis method based on the Onsager reciprocal relations for interdiffusion in a multicomponent melt

Zhong

Chen

et al. 2021

Journal of Applied Physics

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It is a significantly difficult problem to obtain the diffusion coefficients by analyzing the concentration profiles in multicomponent melts. Here, based on the Onsager reciprocal relations, we report a new analysis method, which can achieve the diffusion coefficient matrix by fitting the concentration profiles under a given diffusion time. Our method allows us to obtain the interdiffusion coefficient matrix in a multicomponent system via just a single diffusion couple experiment. Thus, it shows obvious merits compared to the previously reported diffusion path method and the square root diffusivity method. As a qualifying example, the four independent interdiffusion coefficients in a Ce–Al–Cu ternary liquid alloy have been derived from the concentration profiles measured by the multi-slice sliding cell technique. It is demonstrated that such a single experiment analysis method shows great potential for wide use in a multicomponent system.

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Kinetics-dominated interdiffusion in metallic glass-forming liquids

Cited by 5 publications

References 29 publications

Iron self diffusion in liquid pure iron and iron-carbon alloys

Iron self diffusion in liquid pure iron and iron-carbon alloys

In situ Measurement of Thermodiffusion in Liquid Alloys

A new analysis method based on the Onsager reciprocal relations for interdiffusion in a multicomponent melt

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