Tribo-electrochemical characterization of hafnium multilayer systems deposited on nitride/vanadium nitride AISI 4140 steel

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Mora, M.^1 ; Vera, E.^2 ; Aperador, W.^3

Fundación Universitaria Juan de Castellanos, Tunja, Colombia^1

Universidad Pedagógicay Tecnológica de Colombia Tunja, Colombia^2

Universidad Militar Nueva Granada, Bogotá, Colombia^3

关键词: Electrochemical characterizations;    Electrochemical impedance spectroscopy techniques;    Friction coefficients;    Low coefficient of friction;    Multi-layer-coating;    Pin-on-disk tribometers;    Polarization curves;    Polarization resistances;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012032/pdf
DOI  :  10.1088/1742-6596/687/1/012032

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this work is presented the synergistic behaviour among corrosion/wear (tribocorrosion) of the multilayer coatings hafnium nitride/vanadium nitride [HfN/VN]n. The multilayers were deposited on AISI 4140 steel using the technique of physical vapor deposition PVD magnetron sputtering, the tests were performed using a pin-on-disk tribometer, which has an adapted potentiostat galvanostat with three-electrode electrochemical cell. Tribocorrosive parameters such as: Friction coefficient between the coating and the counter body (100 Cr6 steel ball); Polarization resistance by means of electrochemical impedance spectroscopy technique and corrosion rate by polarization curves were determined. It was observed an increase in the polarization resistance, a decrease in the corrosion rate and a low coefficient of friction in comparison with the substrate, due to an increase on the number of bilayers.