Synthesis and characterization of electrodeposited hierarchical nanodendritic NiCoFe alloy powders

Autor(en)

Lidija Rafailovic, Christoph Gammer, Christoph Kleber, Christian Rentenberger, Paul Angerer, Hans-Peter Karnthaler

Abstrakt

Ternary Ni50Co30Fe20 powders with an open dendritic structure were made by electrodeposition. The diffusion controlled deposition allows fabrication of alloy powders with a composition corresponding to that of the electrolyte. Their morphology was studied by electron microscopy methods revealing that the particles have a highly branched dendritic structure extending from the micrometer scale to the nanoscale containing a high density of defects as grain boundaries and twin boundaries. We propose that this structure forms by massive repeated nucleation far off thermodynamical equilibrium at a high current density under strong hydrogen bubble evolution. The nanodendritic structure could be of interest for practical applications due to their high density of active sites and high surface area. The powders are envisioned for electrochemical applications.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Kompetenzzentrum für elektrochemische Oberflächentechnologie GmbH

Journal

Journal of Alloys and Compounds

Band

543

Seiten

167-171

Anzahl der Seiten

5

ISSN

0925-8388

DOI

https://doi.org/10.1016/j.jallcom.2012.07.081

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

104005 Elektrochemie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/968e22b6-a705-4744-8011-a405a1397700