Characterization of mechanical properties and electrochemical behaviour in a Hank?s solution of 316L/Cr1- xAlxN system

2nd Colombian Congress of Electrochemistry; 2nd Symposium on Nanoscience and Nanotechnology

物理学;化学

Osorio, D.M.^1 ; Caicedo, J.C.^1 ; Aperador, W.^2 ; Benitez-Castro, A.M.^3 ; Giraldo-Betancur, A.L.^3 ; Muñoz-Saldaña, J.^3 ; Yañez-Limón, J.M.^3 ; Sanchez, O.^4 ; Zambrano, G.^1

Universidad Del Valle, Cali, Colombia^1

Universidad Militar Nueva Granada, Bogotá, Colombia^2

Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, Querétaro, Mexico^3

Servicio Nacional de Aprendizaje, Cali, Colombia^4

关键词: 316 L stainless steel;    Biomedical applications;    Crystallographic orientations;    Deposited coatings;    Electrochemical behaviour;    Hank's solution;    Reactive magnetron co-sputtering;    Simulated body fluids;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/786/1/012037/pdf
DOI  :  10.1088/1742-6596/786/1/012037

来源: IOP

【 摘 要 】

Cr1-xAlxN hard coatings were successfully deposited by R.F. reactive magnetron co-sputtering in an Ar/N2 gas mixture using chromium and aluminium targets on 316L stainless steel substrates. Crystallographic orientations associated to the Cr1-xAlxN FCC based in the conjugate complex of CrN and w-AlN phases, with ao=4.18Å lattice parameter for the ternary Cr1-xAlxN compound were identified by X-Ray diffraction. The thickness and roughness of the deposited coatings are 1.00±0.05nm and 2.65±0.6nm, respectively. The mechanical properties were determined by nanoindentation leading to a hardness of 27.8±2.6GPa and elastic modulus of 346GPa. The corrosion resistance of the coated 316L/Cr1-xAlxN system under simulated body fluid (SBF, Hank's solution) was determined via electrochemical impedance spectroscopy. A reduction in the corrosion rate of 99% in relation to uncoated 316L stainless steel substrate was found by Tafel. Thus, these coatings seem to be excellent candidates to be used in biomedical applications.