Mass transport driving forces under electric current in the liquid Sn-Zn system - Fédération de recherche « Matière et interactions »
Article Dans Une Revue Scripta Materialia Année : 2025

Mass transport driving forces under electric current in the liquid Sn-Zn system

Résumé

Significant effects of electric currents on mass transport in liquid metals have been observed for long, but the origin of the corresponding driving forces remains unclear in the literature. Without current, two driving forces induce mass transport in liquid metals. (i) A chemical force, coming from concentration gradients. In that case, mass transport occurs by diffusion. (ii) A physical force, resulting from density gradients thermally and/or chemically induced. Here, mass transport occurs by thermal and/or solutal convection. Under electric currents, these driving forces are modified, either by electrostatic or magnetic forces, the corresponding mechanisms being referred to as electroconvection and magnetoconvection, respectively. However, these mechanisms cannot easily be distinguished from each other, leading to confusion in literature. Here, it has been shown that, in the liquid Sn-Zn system, the driving force induced by 500-1000 A/cm 2 electric current densities is magnetic rather than electrostatic, the mechanism being therefore magnetoconvection.

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Dates et versions

hal-04738368 , version 1 (15-10-2024)

Identifiants

Citer

Jean-Philippe Monchoux. Mass transport driving forces under electric current in the liquid Sn-Zn system. Scripta Materialia, 2025, 255, pp.116349. ⟨10.1016/j.scriptamat.2024.116349⟩. ⟨hal-04738368⟩
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