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Dendritic electrocrystallization and the mechanism of powder formation in the potentiostatic electrodeposition of metals

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Abstract

A mechanism for metal powder formation, based on the theories of dendritic growth and nondendritic surface roughness amplification in potentiostatic deposition, is proposed. The mechanism takes into account all those variables recognized in practical systems.

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Abbreviations

C 0 :

bulk concentration

C tip :

concentration around the tip of dendrite

D :

diffusion coefficient

F :

Faraday's constant

h :

height of protrusion

h i :

initial height for dendritic growth

h 0 :

initial height for nondendritic amplification

I :

limiting diffusion current

i :

limiting current density

i d :

current density on the tip of dendrite of height h

i 0 :

exchange current density

N :

number of elevated points

n :

number of electrons

R :

gas constant

r :

dendrite tip radius

S :

electrode surface area

T :

temperature

t :

time

t i :

induction time

V :

molar volume

γ :

surface tension

δ :

thickness of diffusion layer

η :

overpotential

η c :

critical overpotential for powder formation

η i :

critical overpotential for dendrite growth initiation

2.3η0 :

slope of Tafel line

θ :

fraction on flat surface

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Authors and Affiliations

  1. Faculty of Technology and Metallurgy, University of Beograd, Beograd, Yugoslavia

    K. I. Popov, M. D. Maksimović & J. D. Trnjančev

  2. Institute for Electrochemistry ICTM, University of Beograd, Beograd, Yugoslavia

    M. G. Pavlović

Authors
  1. K. I. Popov
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  2. M. D. Maksimović
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  3. J. D. Trnjančev
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  4. M. G. Pavlović
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Popov, K.I., Maksimović, M.D., Trnjančev, J.D. et al. Dendritic electrocrystallization and the mechanism of powder formation in the potentiostatic electrodeposition of metals. J Appl Electrochem 11, 239–246 (1981). https://doi.org/10.1007/BF00610985

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  • DOI: https://doi.org/10.1007/BF00610985

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