Electrochemical behavior of (Ti 1-x Nb x)5Si3 nanocrystalline films in simulated physiological media.
In this paper, (Ti1-xNbx)5Si3 nanocrystalline films were synthesized and their potential as highly corrosion-resistant coatings for the biomedical alloy Ti-6Al-4V was explored. To assess the electrochemical behavior of the as-deposited films, the samples were immersed in Ringer's solution open to air at 37°C. The processes that govern the electrochemical reactions at the film surface were analyzed using a combination of complementary electrochemical measurement techniques such as potentiodynamic polarization, electrochemical impedance spectroscopy and Mott-Schottky analysis. The results show that the (Ti1-xNbx)5Si3 nanocrystalline films offer Ti-6Al-4V a strong shield from corrosive attack and the addition of Nb in the films greatly enhances their resistance to corrosion, and in so doing, minimizes metal ion release. Collectively, our data suggest that (Ti1-xNbx)5Si3 nanocrystalline films as supreme coatings with anti-corrosive properties have potential to improve the performance and extend the service life of orthopedic and cochlear implants.
Department of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, People's Republic of China.
Linlin
L
Liu
Department of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, People's Republic of China. Electronic address: xujiang73@nuaa.edu.cn.
Jiang
J
Xu
School of Materials Science and Engineering, University of New South Wales, Kensington, NSW 2052, Australia.
Paul
P
Munroe
School of Pathology and Laboratory Medicine, University of Western Australia, Crawley, WA 6009, Australia.
Jiake
J
Xu
School of Mechanical Engineering, University of Adelaide, Adelaide, SA 5005, Australia. Electronic address: zonghan.xie@adelaide.edu.au.
Zong-Han
ZH
Xie
D000162:Acoustics; D000497:Alloys / Q000737:chemistry*; D055119:Elastic Modulus; D004560:Electricity; D055664:Electrochemical Techniques; D006244:Hardness; D007552:Isotonic Solutions / Q000737:chemistry*; D008422:Materials Testing; D018625:Microscopy, Atomic Force; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D056951:Photoelectron Spectroscopy; D000077331:Ringer's Solution; D014961:X-Ray Diffraction
D000497:Alloys; D007552:Isotonic Solutions; D000077331:Ringer's Solution
Corrosion; Nanostructured films; Nb alloying; Ringer’s solution