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The effect of nano-Al2O3 dispersed phase in nickel matrix electrocodeposited

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Geta Cârâc, Cătălina Iticescu, Lidia Benea, Thomas Lampke and Siegfried Steinhauser

Editorial: Revue Roumaine de Chimie, 52 (11), p.1057–1062, 2007.


Electrocodeposition is a method successfully used to obtain composite coatings. The composite coatings in nickel
matrix and nano-Al2O3 particles (20 nm) as dispersed phase were obtained from a Watts electrolytic bath at a current
density of 3A/dm2. The concentration of nano-Al2O3 was 5, 10 and respectively 20g/L oxide in the bath. The effect of
the embedded of Al2O3 nanoparticles in nickel matrix was studied. The surface morphology of layers was studied by
light and scanning electron microscopy (SEM) and chemical composition by EDAX analysis. The Vickers
microhardness on cross section of layers was investigated. The results show that the morphology (structure and
roughness) and mechanical characteristics (e.g. microhardness) of the composite coatings differ from nickel deposits
without nanoparticles.

Cuvinte cheie: electrodeposition, nickel matrix, alumina particles, surphace morphology