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Effect of the Applied Current Density and Deposition Time on Electro-Codeposition Process of Cobalt Matrix Reinforced with Nano-CeO2

Simionescu-Bogatu Nicoleta, Benea Lidia

Archives of Metallurgy and Materials

2022

Vol. 67, iss. 2

615--622

This research paper aims to study the influence of some of the main parameters applied to the electrodeposition process on the nanocomposite layers obtained by strengthening the cobalt matrix with cerium oxide nanoparticles. Thus, the current efficiency (process efficiency) and the degree of inclusion of cerium oxide nanoparticles into cobalt matrix are analyzed according to the current density, the concentration of nanoparticles dispersed in the deposition electrolyte and time of the process. The choice of the optimal parameters imposed on the electrodeposition process lead to the improvement of the quality of the obtained layers, to the reduction of production costs and last but not least to the improvement of corrosion and tribocorrosion resistance of the material. The obtained results show an increase of current efficiency in the process of the deposited layers with the increase of time and current density applied. There is also a slight increasing in the current efficiency of the obtained layers with the increase of the concentration of nanoparticles dispersed in the deposition electrolyte. The increase of the current density, time and the concentration of nanoparticles also have an effect on the degree of embedded CeO2 nanoparticles into cobalt matrix for the studied nanocomposite layers. The degree of inclusion of nanoparticles decreases for the same studied system with the increasing of the current density.

Struktura, właściwości i odporność na zużycie powłok na osnowie kobaltu

Zwierzchowski M.

Przegląd Spawalnictwa

2008

R. 80, nr 1

25-30

Przedstawiono wyniki badań mikroanalizy rentgenowskiej, badań na dyfraktometrze rentgenowskim, analizę mikroskopową oraz wyniki badań odporności na zużycie ścierne i kontaktowe cieplnie wytworzonych powłok na osnowie kobaltu oraz na osnowie niklu. Wyniki przeprowadzonych badań potwierdziły słuszność stosowania powłok na osnowie kobaltu oraz na osnowie niklu w procesach regeneracji elementów układów rozrządu siników ZS.

The results of X-ray microanalysis examination, examinations with X-ray diffraction instrument, microscopic analysis and the results of examinations of resistance to friction and contact thermal wear of the coats made on cobalt matrix and nickel matrix were presented. The results of the examinations confirmed the rightness of application of coats on cobalt matrix and on nickel matrix in the regeneration process of the components of ZS engine timing gear systems.