Atomic diffusion mechanisms in a binary metallic melt

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Voigtmann T, Meyer A, Holland-Moritz D, Stüber S, Hansen T, Unruh T
Zeitschrift: EPL - Europhysics Letters
Verlag: EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
Jahr der Veröffentlichung: 2008
Band: 82
Heftnummer: 6
ISSN: 0295-5075


Abstract


The relation between static structure and dynamics as measured through the diffusion coefficients in viscous multicomponent metallic melts is elucidated by the example of the binary alloy Zr(64)Ni(36), by a combination of neutron-scattering experiments and mode-coupling theory of the glass transition. Comparison with a hard-sphere mixture shows that the relation between the different self diffusion coefficients strongly depends on chemical short-range ordering. For the Zr-Ni example, the theory predicts both diffusivities to be practically identical. The kinetics of concentration fluctuations is dramatically slower than that of self-diffusion, but the overall interdiffusion coefficient is equally large or larger due to a purely thermodynamic prefactor. This result is a general feature for non-demixing dense melts, irrespective of chemical short-range order. Copyright (C) EPLA, 2008.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


Einrichtungen weiterer Autorinnen und Autoren

Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Institute Laue-Langevin (ILL)
Technische Universität München (TUM)


Zitierweisen

APA:
Voigtmann, T., Meyer, A., Holland-Moritz, D., Stüber, S., Hansen, T., & Unruh, T. (2008). Atomic diffusion mechanisms in a binary metallic melt. EPL - Europhysics Letters, 82(6). https://dx.doi.org/10.1209/0295-5075/82/66001

MLA:
Voigtmann, Thomas, et al. "Atomic diffusion mechanisms in a binary metallic melt." EPL - Europhysics Letters 82.6 (2008).

BibTeX: 

Zuletzt aktualisiert 2018-08-08 um 03:02