Wear-corrosion response of Cerium oxide reinforced Cobalt hybrid composite layers in biological solution

International Conference on Innovative Research - ICIR EUROINVENT 2019

Simionescu, N.^1 ; Benea, L.^1 ; Celis, J.P.^2

Competences Center: Interfaces-Tribocorrosion-Electrochemical Systems (CC-ITES), Faculty of Engineering, Dunarea de Jos University of Galati, 47 Domneasca street, Galati, Romania^1

Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, Leuven

B-3001, Belgium^2

关键词: Biological solutions;    Co-deposition methods;    Coefficient of frictions;    Dispersed nanoparticles;    Electrochemical parameters;    Hybrid nanocomposites;    Lubricating condition;    Sulphate solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/572/1/012003/pdf
DOI  :  10.1088/1757-899X/572/1/012003

来源: IOP

【 摘 要 】

The research work aims at improving biomaterials surface properties by Co/nano-CeO2 composite layers obtained by electro-codeposition method from a cobalt sulphate solution containing CeO2 dispersed nanoparticles. The thicknesses of pure cobalt and Co/CeO2 hybrid nanocomposite layers are measured versus applied current density and time of the plating process. The tribocorrosion properties of Co/nano-CeO2 hybrid nanocomposite layers and pure Co layer obtained were comparatively investigated friction sliding tests in a unidirectional tribometer in lubricating conditions using biological solution (Hank). During the tribocorrosion test, the normal force, tangential force, coefficient of friction, number of cycles as well as the electrochemical parameter (potential), were continuously monitored. The results show that the wear-corrosion (tribocorrosion) behavior of Co/nano-CeO2 hybrid nanocomposite layers are closely related with dispersed reinforcing nano-CeO2 content. The hybrid nanocomposite layers with all CeO2 content shows increased wear-corrosion resistance as compared with pure Co layer, by decreasing wear volume loss with increasing nano-CeO2 particles dispersed into plating electrolyte.