Characterization of Ni-W/MWCNT Nanocomposite Layers Formed by Pulsed Electrochemical Deposition1

摘要

Ni-W/MWCNT nanocomposite layers with high concentration and uniformly dispersed MWCNT nanoparticulates were formed by pulsed electrochemical deposition technique. Nanocomposite layers were analyzed by SEM, AFM, microhardness and tafel tests. Effect of frequency of pulsed current and concentration of MWCNT nanoparticulates in metallic matrix have been investigated on electrochemical and mechanical properties of obtained layers. It has been concluded that both of the electrochemical and mechanical properties of Ni-W/MWCNT nanocomposite layers formed by pulsed current were improved significantly with respect to Ni-W layer with out nanoparticulates. It was revealed that the obtained results were not only concerned by the concentration of MWCNT nanoparticulates in the nanocomposite layer, but also influenced by the distribution of nanoparticulates in metallic matrix.