Biocorrosion studies of TiO2 nanoparticle-coated Ti–6Al–4V implant in simulated biofluids

In this paper, the effects of Nb addition (5–20 wt %) on the microstructure, mechanical properties, corrosion behavior, and cytotoxicity of Ti-Nb alloys were investigated with the aim of understanding the relationship between phase/microstructure and various properties of Ti-xNb alloys. Phase/microstructure was analyzed using X-ray diffraction (XRD), SEM, and TEM. The results indicated that the Ti-xNb alloys (x = 10, 15, and 20 wt %) were mainly composed of α + β phases with precipitation of the isothermal ω phase. The volume percentage of the ω phase increased with increasing Nb content. We also investigated the effects of the alloying element Nb on the mechanical properties (including Vickers hardness and elastic modulus), oxidation protection ability, and corrosion behavior of Ti-xNb binary alloys. The mechanical properties and corrosion behavior of Ti-xNb alloys were found to be sensitive to Nb content. These experimental results indicated that the addition of Nb contributed to the hardening of cp-Ti and to the improvement of its oxidation resistance. Electrochemical experiments showed that the Ti-xNb alloys exhibited superior corrosion resistance to that of cp-Ti. The cytotoxicities of the Ti-xNb alloys were similar to that of pure titanium.

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“…K is the corrosion rate constant (3272 mm/year), E w is equivalent weight, A is the area, and d is the density [35]. …”

Section: Methodsmentioning

confidence: 99%

Effect of Nb on the Microstructure, Mechanical Properties, Corrosion Behavior, and Cytotoxicity of Ti-Nb Alloys

et al. 2015

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“…The typical larger radius of curvature from Nyquist plot, clearly predicts that the composite coating follows non‐ideal capacitance, a constant phase element (CPE) was introduced [17]. This non‐ideal capacitance often associated with porous coating and the impedance of the CPE has been derived by using the following equation:

CPE = 1 / Y_{0} false(J W false)^{n}

where Y 0 is the admittance constant, ‘ n ’ is the empirical exponent of CPE, 0 < n < 1.…”

Section: Resultsmentioning

confidence: 99%

In‐situ fabrication of zirconium–titanium nano‐composite and its coating on Ti‐6Al‐4V for biomedical applications

Chellappa

Vijayalakshmi

2016

IET nanobiotechnol.

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In this study, nanocomposite powder consisting of zirconia and titania (Zr-Ti) have been synthesised by sol-gel method, with the aim of protecting Ti-6Al-4V surface. A simple and low cost electrophoretic deposition (EPD) technique has been employed for coating the nanocomposite material on Ti-6Al-4V. The prepared nanocomposite powder was characterised for its functional groups, phase purity, surface topography by Fourier transform infrared spectroscopy, powder X-ray diffraction and scanning electron microscopy. Further, the biocompatibility nature of the composite powder was studied by [3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide] colorimetric assay and fluorescence analysis with MG63 osteoblast cell lines. The electrochemical behaviour of composite coating was investigated by potentiodynamic polarization and electrochemical impedance method. The results obtained from the electrochemical techniques indicate more corrosion resistance behaviour with increase of value with the corresponding decrease in values. From the above findings, the composite coating acts as a barrier layer against corrosion by preventing the leaching of metal ions from a dense and defect free coating. A scratch test analyser was used to assess the integrity of the coating; the lower traction force value of composite coating with increase in load has confirmed the presence of thick adherent layer on the substrate.

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“…A three-electrode cell is usually used to carry out the electrochemical studies. Quantitative assessments of corrosion include electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (Tafel analysis), open circuit voltage (OCV) and electrochemical noise (ECN) [140]. Among them, EIS is recognized as one of the most accurate electrochemical methods [140].…”

Section: Corrosion Testsmentioning

confidence: 99%

“…Quantitative assessments of corrosion include electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (Tafel analysis), open circuit voltage (OCV) and electrochemical noise (ECN) [140]. Among them, EIS is recognized as one of the most accurate electrochemical methods [140]. This is due to the fact that EIS requires minimum AC signals, hence avoiding the perturbation on the electrochemical system and meanwhile reducing the errors.…”

Section: Corrosion Testsmentioning

confidence: 99%

State of the art of bioimplants manufacturing: part II

Kang

2018

Adv. Manuf.

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The manufacturing of bioimplants not only involves selecting proper biomaterials with satisfactory bulk physicochemical properties, but also requires special treatments on surface chemistry or topography to direct a desired host response. The lifespan of a bioimplant is also critically restricted by its surface properties. Therefore, developing proper surface treatment technologies has become one of the research focuses in biomedical engineering. This paper covers the recent progress of surface treatment of bioimplants from the aspects of coating and topography modification. Pros and cons of various technologies are discussed with the aim of providing the most suitable method to be applied for different biomedical products. Relevant techniques to evaluate wear, corrosion and other surface properties are also reviewed.

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Biocorrosion studies of TiO2 nanoparticle-coated Ti–6Al–4V implant in simulated biofluids

Cited by 37 publications

References 37 publications

Effect of Nb on the Microstructure, Mechanical Properties, Corrosion Behavior, and Cytotoxicity of Ti-Nb Alloys

Effect of Nb on the Microstructure, Mechanical Properties, Corrosion Behavior, and Cytotoxicity of Ti-Nb Alloys

In‐situ fabrication of zirconium–titanium nano‐composite and its coating on Ti‐6Al‐4V for biomedical applications

State of the art of bioimplants manufacturing: part II

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