INQUIMAE   12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
Numerical and Experimental Studies of Electrochemical Deposition Quasi-Stable Growth
Autor/es:
ESTEBAN E. MOCSKOS, GRACIELA GONZALEZ, FERNANDO V. MOLINA,GUILLERMO MARSHALL
Revista:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY - (Print)
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Año: 2010
ISSN:
1572-6657
Resumen:
Abstract
Electrochemical Deposition (ECD) in thin cells in a vertical position relative to
gravity (cathode above anode) yields a growth pattern formation with a uniform
front. However, detailed analysis of front evolution reveals a complex competi-
tion between neighboring branches leading to a locally uctuating growth. We
study these uctuations through experiments and theory. Experiments reveal
that the uniform dendrite front is due to an acceleration and deceleration of
the leading branches, the latter resulting from the building of a stable strati ed
ow at their tips. Theory predicts local electrohydrodynamic uctuations near
the dendrite tips amid a global stable strati ed ow. Dendrite tips are sur-
rounded by arches joining neighboring tips, separating depleted and constant
concentration solution zones; the arches shape is the result of electro and gravito
convective driven vortex rings. The simulated growth of a single tip exhibits
the formation of a mushroom-like shape which is consistent with experimental
observations.