Study of the dendritic growth of Ni-Co alloys electrodeposited on Cu substrates

Autor(en)

Lidija Rafailovic, Djordje M. Minic, Hans-Peter Karnthaler, Jaroslaw Wosik, T Trisovic, Gerhard Nauer

Abstrakt

Ni-Co alloy deposits and their parent metals were formed on Cu substrates by electrolysis under different current densities applied in the galvanostatic regime. A quantitative scanning electron microscopy technique was employed to study the morphology and surface roughness of the obtained deposits. The structure of the deposits is governed by the nature of depositing ions and quantity of evolved hydrogen. The cauliflower morphology and the highest mean surface roughness values are the results of electrodeposition from the Ni containing bath. The structure of the Co deposits formed under the same conditions and determined by the formation of the hexagonal close-packed phase results in a more uniform grain size distribution and formation of smoother platelet deposits. The mean surface values of the parent metals are independent of the current density. The dendritic growth is a special case of a structure formed only in the Ni-Co alloy deposition at selected, high current densities of 220 and 400 mA cm-2. The dendrites obtained at a higher current density of 400 mA cm-2 have shown more developed structures with smaller dendrites that have more pronounced secondary branch and high order branches.

Organisation(en)

Physik Nanostrukturierter Materialien, Institut für Physikalische Chemie

Externe Organisation(en)

University of Belgrade, Kompetenzzentrum für elektrochemische Oberflächentechnologie GmbH , Serbian Academy of Sciences and Arts

Journal

Electrochemical Society. Journal

Band

157

Seiten

295-301

Anzahl der Seiten

7

ISSN

0013-4651

DOI

https://doi.org/10.1149/1.3336957

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

104017 Physikalische Chemie, 104005 Elektrochemie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/0e1b6806-87dd-4e8c-ae30-8fe155a359cf