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Fabrication and Performance of ZnO Doped Tantalum Oxide Multilayer Composite Coatings on Ti6Al4V for Orthopedic Application

1
School of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
2
School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, China
3
School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China
4
Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(5), 685; https://doi.org/10.3390/nano9050685
Received: 28 February 2019 / Revised: 15 April 2019 / Accepted: 30 April 2019 / Published: 2 May 2019
(This article belongs to the Special Issue Biomedical Applications of Nanotechnology)
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Abstract

Ti6Al4V titanium alloy has been widely used as medical implant material in orthopedic surgery, and one of the obstacles preventing it from wide use is toxic metal ions release and bacterial implant infection. In this paper, in order to improve corrosion resistance and antibacterial performance of Ti6Al4V titanium alloy, ZnO doped tantalum oxide (TaxOy) multilayer composite coating ZnO-TaxOy/TaxOy/TaxOy-TiO2/TiO2/Ti (ZnO-TaxOy) was deposited by magnetron sputtering at room temperature. As a comparison, monolayer TaxOy coating was prepared on the surface of Ti6Al4V alloy. The morphology and phase composition of the coatings were investigated by field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD), the elemental chemical states of coating surfaces were investigated by X-ray photoelectron spectroscope (XPS). The adhesion strength and corrosion resistance of the coatings were examined by micro-scratch tester and electrochemical workstations, respectively. The results show that the adhesion strength of multilayer ZnO-TaxOy coating is 16.37 times higher than that of single-layer TaxOy coating. The ZnO-TaxOy composite coating has higher corrosion potential and lower corrosion current density than that of TaxOy coating, showing better corrosion inhibition. Furthermore, antibacterial test revealed that multilayer ZnO-TaxOy coating has a much better antibacterial performance by contrast. View Full-Text
Keywords: zinc oxide; tantalum oxide; Ti6Al4V; anti-inflammatory modification; antibacterial property; magnetron sputtering; corrosion resistance; adhesion strength zinc oxide; tantalum oxide; Ti6Al4V; anti-inflammatory modification; antibacterial property; magnetron sputtering; corrosion resistance; adhesion strength
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ding, Z.; He, Q.; Ding, Z.; Liao, C.; Chen, D.; Ou, L. Fabrication and Performance of ZnO Doped Tantalum Oxide Multilayer Composite Coatings on Ti6Al4V for Orthopedic Application. Nanomaterials 2019, 9, 685.

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