Effect of microstructural evolution on wettability and tribological behavior of TiO2 nanotubular arrays coated on Ti–6Al–4V

Sarraf, Maria; Zalnezhad, E.; Bushroa, A.R.; Hamouda, A.M.S.; Rafieerad, Alireza; Nasiri–Tabrizi, Bahman

doi:10.1016/j.ceramint.2015.02.136

Cited by 58 publications

(44 citation statements)

References 44 publications

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“…More recently, TiO 2 nanotube arrays are generated when the anodic oxide is moderately soluble in the electrolyte, which showed a high antibacterial efficacy [12]. However, their durability under wear conditions is low in view of their limited thickness and low hardness (373HV) [13]. As a wet chemical surface coating technology, sol–gel is employed by some researchers to produce a dense and smooth anti-bacterial TiO 2 layers (<10 µm) on Ti surfaces without affecting the surface morphology at the micrometric scale.…”

Section: Introductionmentioning

confidence: 99%

Improving tribological and anti-bacterial properties of titanium external fixation pins through surface ceramic conversion

Dong

Mukinay

et al. 2016

J Mater Sci: Mater Med

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In this study, an advanced ceramic conversion surface engineering technology has been applied for the first time to self-drilling Ti6Al4V external fixation pins to improve their performance in terms of biomechanical, bio-tribological and antibacterial properties. Systematic characterisation of the ceramic conversion treated Ti pins was carried out using Scanning electron microscope, X-ray diffraction, Glow-discharge optical emission spectroscopy, nano- and micro-indentation and scratching; the biomechanical and bio-tribological properties of the surface engineered Ti pins were evaluated by insertion into high density bone simulation material; and the antibacterial behaviour was assessed with Staphylococcus aureus NCTC 6571. The experimental results have demonstrated that the surfaces of Ti6Al4V external fixation pins were successfully converted into a TiO2 rutile layer (~2 μm in thickness) supported by an oxygen hardened case (~15 μm in thickness) with very good bonding due to the in-situ conversion nature. The maximum insertion force and temperature were reduced from 192N and 31.2 °C when using the untreated pins to 182N and 26.1 °C when the ceramic conversion treated pins were tested. This is mainly due to the significantly increased hardness (more than three times) and the effectively enhanced wear resistance of the cutting edge of the self-drilling Ti pins following the ceramic conversion treatment. The antibacterial tests also revealed that there was a significantly reduced number of bacteria isolated from the ceramic conversion treated pins compared to the untreated pins of around 50 % after 20 h incubation, P < 0.01 (0.0024). The results reported are encouraging and could pave the way towards high-performance anti-bacterial titanium external fixation pins with reduced pin-track infection and pin loosing.

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Section: Introductionmentioning

confidence: 99%

Improving tribological and anti-bacterial properties of titanium external fixation pins through surface ceramic conversion

Dong

Mukinay

et al. 2016

J Mater Sci: Mater Med

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“…Considering that sliding did not significantly affect the OCP values, and caused less plastic deformation on 60AT samples, it can be suggested that the self-organized nanotubular morphology provided relatively improved tribocorrosion resistance. Even though, it is clear that the effect of crystallinity and crystalline structure [3], as well as the differences on the morphology or the thickness of the nanotubular layers to the tribocorrosion behaviour needs further studies including potentiostatic or potentiodynamic tribocorrosion tests in order to evaluate the corrosion kinetics under sliding. Moreover, further studies are also needed in order to deeply characterize the surfaces, sub-surfaces and wear debris, to quantify the total amount material degradation as a function of testing parameters simulating the in vivo conditions.…”

Section: Fig 3a Presents the Evolution Of Open Circuit Potential (Ocp)mentioning

confidence: 99%

“…Recently, nanostructured Ti surfaces gained an intensive attention in order to improve biocompatibility, wear resistance, and osseointegration properties [2][3][4]. Within several available techniques, anodic treatment (AT) is a reliable, economic, and easy process enabling the growth of titanium oxide layer with nanotubular morphology [5,6].…”

Section: Introductionmentioning

confidence: 99%

Preliminary investigation on the tribocorrosion behaviour of nanotubular structured Ti6Al4V surfaces

et al. 2018

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a b s t r a c tIn order to improve its tribocorrosion resistance, nanotubular structures were produced on Ti6Al4V surfaces by anodic treatment in a mixture of 1 M H 2 SO 4 and 0.08 M HF electrolyte. Tribocorrosion tests were performed in a phosphate-buffered saline solution (PBS) against an alumina ball under 50 mN. Results showed that nanostructured surfaces exhibited significantly lower tendency to corrosion due to the protecting effect given by the well-adherent TiO 2 nanotubular layer.

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“…149,150 Nevertheless, some studies suggest that nano-TiO 2 provides more safe scaffolds for tissue recognition in endo-prosthetic surgery. 165 Benea et al increased the surface thickness of the Ti-Alloy from 23.06 nm to 123.35 nm by using the anodic oxidation technique for depositing TiO 2 nanoparticles, which resulted in safer and better tribo-corrosion than the untreated Ti-Alloy. [153][154][155] In biomedical applications, especially in orthopaedic plating 156,157 and stenting in the cardiovascular system (CVS), it was found that when the surface was coated with nano-TiO 2 or submicron particles, the macrophage chemotaxis was appreciably reduced and the chances of thrombosis as a postoperative complication were delayed (one of the leading causes of stenosis and complications in CVS stenting).…”

Section: Nano-tio 2 For Medical Implantsmentioning

confidence: 99%

Biomedical applications of nano-titania in theranostics and photodynamic therapy

et al. 2016

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Titanium dioxide (TiO2) is one of the most abundantly used nanomaterials for human life. It is used in sunscreen, photovoltaic devices, biomedical applications and as a food additive and environmental scavenger. Nano-TiO2 in biomedical applications is well documented. It is used in endoprosthetic implants and early theranostics of neoplastic and non-neoplastic maladies as a photodynamic therapeutic agent and as vehicles in nano-drug delivery systems. Herein, we focus on the recent advancements and applications of nano-TiO2 in bio-nanotechnology, nanomedicine and photodynamic therapy (PDT).

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Effect of microstructural evolution on wettability and tribological behavior of TiO2 nanotubular arrays coated on Ti–6Al–4V

Cited by 58 publications

References 44 publications

Improving tribological and anti-bacterial properties of titanium external fixation pins through surface ceramic conversion

Improving tribological and anti-bacterial properties of titanium external fixation pins through surface ceramic conversion

Preliminary investigation on the tribocorrosion behaviour of nanotubular structured Ti6Al4V surfaces

Biomedical applications of nano-titania in theranostics and photodynamic therapy

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