Micro-scratch and corrosion behavior of functionally graded HA-TiO2 nanostructured composite coatings fabricated by electrophoretic deposition

Farnoush, Hamidreza; Mohandesi, Jamshid Aghazadeh; Çi̇menoǧlu, Hüseyin

doi:10.1016/j.jmbbm.2015.02.021

Cited by 71 publications

(21 citation statements)

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“…Bioactivity and adherence of HA coatings to the implant can be ameliorated by adding bioactive titania powders [32]. Farnoush et al [33] reported enhancement of adhesion strength and fracture toughness and decrease of corrosion rate of coatings in SBF by the implementation of titania to the HA coatings on the Ti-6Al-4V substrate [34]. EPD process has been used to produce HA + titania nanocomposite on Ti alloy, which is a hard coating with high wear and corrosion resistance [30,[33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…Farnoush et al [33] reported enhancement of adhesion strength and fracture toughness and decrease of corrosion rate of coatings in SBF by the implementation of titania to the HA coatings on the Ti-6Al-4V substrate [34]. EPD process has been used to produce HA + titania nanocomposite on Ti alloy, which is a hard coating with high wear and corrosion resistance [30,[33][34][35]. Mohan et al [35] determined that the strength and adherence of the coating to the substrate increased by sintering, whereas the corrosion resistance was decreased.…”

Section: Introductionmentioning

confidence: 99%

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Electrophoretic Deposition of Hydroxyapatite–Chitosan–Titania on Stainless Steel 316 L

2019

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In this research, hydroxyapatite (HA)–chitosan–titania nanocomposite coatings were formed on 316 L stainless steel using electrophoretic deposition (EPD) from alcoholic (methanol and ethanol) suspensions containing 0.5 g/L chitosan and 2 and 5 g/L HA and 2 and 5 g/L Titania. The effect of different parameters on the deposition rate, morphology, and corrosion resistance of the coatings in simulated body fluid (SBF) at 37 °C has been studied. The coatings’ properties were investigated using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). Based on the results of this work, it was found that the deposition rate in ethanolic suspensions is lower than methanolic ones. Moreover, the coating surface was smoother when the ethanol was used as a solvent in suspensions in comparison to the ones where methanol was the solvent. The coating deposited from a suspension containing 0.5 g/L chitosan, 2 g/L HA, and 5 g/L titania with ethanol as solvent had the highest corrosion resistance in SBF at 37 °C.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrophoretic Deposition of Hydroxyapatite–Chitosan–Titania on Stainless Steel 316 L

2019

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“…What’s more, it should be noted that Ta x O y coating and the Ti6Al4V substrate differ remarkably in thermal expansion coefficient (CTE); an environmental temperature fluctuation may cause the peel-off or dysfunction/defect of the whole coatings. The intermediate layer plays a buffering effect to reduce the CTE mismatch between the Ti6Al4V (α Ti6Al4V = 8.9 × 10 −6 K −1 ) [65] substrate and Ta x O y coating (α Ta-O = 2.9 × 10 −6 K −1 ) [66]. Under some temperature variations, it maintains the binding ability and post heating treatment could facilitate the interfacial reactions and diffusions, in turn enhancing the adhesion strength between the Ti6Al4V substrate and the multilayer coating.…”

Section: Resultsmentioning

confidence: 99%

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

Ding

et al. 2019

Nanomaterials

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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.

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“…Seven years ago, we introduced the method of fracture assessment via scratch testing. The theory and Since then, the method has been widely used to characterize reservoir rocks [75], tribological coatings [58,27], steel tools [70], coal [54], and rocks [32], and other appications. The scratch test consists of drawing a Rockwell C diamond stylus across the flat surface of the specimen under a progressively increasing vertical load and a constant scratch speed of 6 mm/min.…”

Section: Scratch Testingmentioning

confidence: 99%

Influence of geochemistry on toughening behavior of organic-rich shale

Akono

Kabir

2018

Acta Geotech.

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Our research objective is to understand the influence of geochemistry on the fracture behavior of organic-rich shale at multiple length-scales. Despite an increasing focus on the fracture behavior of organic-rich shale, the relationships between geochemistry and fracture behavior remain unclear and there is a scarcity of experimental data available. To this end, we carry out 59 mesoscale scratch-based fracture tests on 14 specimens extracted from 7 major gas shale plays both in the United States and in France. Post-scratch testing imaging reveal fractures with small crack width of about 400 nm. The fracture toughness is evaluated using the energetic size effect law, which is extended to generic axisymmetric probes. A nonlinear anisotropic and multiscale fracture behavior is observed. In addition, a positive correlation is found between the fracture toughness and the presence of of kerogen, clay and calcite. Moreover, the geochemistry is found to influence the timescale and the regime of propagation of the hydraulic fracture at the macroscopic length-scale. In particular, shale systems rich in TOC, clay and calcite are more likely to exhibit high values of the fluid lag and low hydraulic crack width. Our findings highlight the need for advanced constitutive models for organic-rich shale systems and advanced hydraulic fracturing solutions that can fully integrate the complex fracture response of organic-rich shale materials.

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Micro-scratch and corrosion behavior of functionally graded HA-TiO2 nanostructured composite coatings fabricated by electrophoretic deposition

Cited by 71 publications

References 50 publications

Electrophoretic Deposition of Hydroxyapatite–Chitosan–Titania on Stainless Steel 316 L

Electrophoretic Deposition of Hydroxyapatite–Chitosan–Titania on Stainless Steel 316 L

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

Influence of geochemistry on toughening behavior of organic-rich shale

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