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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Shanaghi, Ali
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2021Enhanced corrosion resistance and reduced cytotoxicity of the AZ91 Mg alloy by plasma nitriding and a hierarchical structure composed of ciprofloxacin-loaded polymeric multilayers and calcium phosphate coatingcitations
- 2021Corrosion resistance, nano-mechanical properties, and biocompatibility of Mg-plasma-implanted and plasma-etched Ta/TaN hierarchical multilayered coatings on the nitrided AZ91 Mg alloycitations
- 2021Enhanced corrosion resistance, antibacterial properties, and biocompatibility by hierarchical hydroxyapatite/ciprofloxacin-calcium phosphate coating on nitrided NiTi alloycitations
- 2021Effects of the tantalum intermediate layer on the nanomechanical properties and biocompatibility of nanostructured tantalum/tantalum nitride bilayer coating deposited by magnetron sputtering on the nickel titanium alloycitations
- 2020EIS and noise study of zirconia-alumina- benzotriazole nano-composite coating applied on Al2024 by the sol-gel methodcitations
- 2019Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl<sub>6</sub>V<sub>4</sub>citations
- 2019Improved corrosion behavior of DLC-coated AZ91 Mg
- 2019Nano-mechanical properties of zirconia-alumina-benzotriazole nano-composite coating deposited on Al2024 by the sol-gel methodcitations
- 2019Effects of Benzotriazole on nano-mechanical properties of zirconia-alumina-Benzotriazole nanocomposite coating deposited on Al 2024 by the sol-gel methodcitations
- 2018Effects of silica and Ag on the electrochemical behavior of titania-based nanocomposite coatings deposited on 2024 aluminum alloy by the sol-gel methodcitations
- 2018Improving of tribology properties of TiAl6V4 with nanostructured Ti/TiN-multilayered coating deposited by high-vacuum magnetron sputteringcitations
- 2017Effect of Inhibitor Agents Addition on Corrosion Resistance Performance of Titania Sol–Gel Coatings Applied on 304 Stainless Steelcitations
- 2017Corrosion behavior of reactive sputtered Ti/TiN nanostructured coating and effects of intermediate titanium layer on self-healing propertiescitations
- 2017Nano mechanical and wear properties of multi-layer Ti/TiN coatings deposited on Al 7075 by high-vacuum magnetron sputteringcitations
- 2012Effect of plasma CVD operating temperature on nanomechanical properties of TiC nanostructured coating investigated by atomic force microscopycitations
- 2012Effects of duty cycle on microstructure and corrosion behavior of TiC coatings prepared by DC pulsed plasma CVDcitations
- 2011Improved tribological properties of TiC with porous nanostructured TiO 2 intermediate layercitations
Places of action
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document
Improved corrosion behavior of DLC-coated AZ91 Mg
Abstract
<b>Introduction: </b>The native film of MgO/Mg(OH)<sub>2</sub>/MgCO<sub>3</sub> formed on the AZ91 magnesium alloy during air exposure has a porous nature and poor adhesion. It not only cannot protect the Mg substrate adequately, but also is sometimes prone to more corrosion reactions [1-3]. Deposition of a coating is an effective way to enhance the corrosion resistance and in particular, diamond like carbon (DLC) coatings can produce excellent protection and performance due to the low friction and chemical inertness. In some cases, doping with extraneous elements has been observed to enhance the corrosion resistance of DLC coatings and the properties depend on the deposition technique and precursors [4-5]. In this work, we aim at improving the corrosion resistance and adhesion strength of DLC coatings by producing an intermediate layer before DLC deposition by nitrogen plasma immersion ion implantation and deposition (N-PIII&D). <br/><b>Materials and Methods: </b>To enhance the adhesion strength of the DLC coating,a titanium intermediate layer was deposited on the N-PIII treated AZ91 alloy substrate by medium-frequency magnetron sputtering at 250 °C in the PIII&D instrument. Afterwards, a conductive DLC layer was deposited with the aid of an anode layer ion source using an Ar to C<sub>2</sub>H<sub>2</sub> ratio of 1 to 5 for 3 h.The phase, structure, chemical composition, and morphology were evaluated by X-ray diffraction (XRD) and atomic force microscopy (AFM). The corrosion resistance was assessed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization conducted in simulated body fluids (SBF) at 37 °C. <br/><b>Results and Discussion: </b>The DLC coating offers better corrosion protection. A uniform of magnesium nitride phase is produced between the DLC coating and ductile AZ91 alloy. The broad (111) XRD peak suggests a nanostructured DLC coating on the N-PIII&D AZ91 alloy (Fig. 1). The DLC coating also acts as an insulating layer to inhibit corrosion reactions between the AZ91alloy and SBF as indicated by the smaller corrosion current density and positive shift in the corrosion potential (Fig. 2). <br/><b>Conclusion: </b>A nanostructured DLC coating decreases the corrosion current density and shifts the corrosion potential positively indicating enhanced corrosion resistance of the N-PIII treated AZ91 alloy. In conjunction with the DLC film, the ceramic layer composed of magnesium nitride improves the adhesion of the DLC coating in addition to better corrosion resistance, lower friction coefficient, and higher surface hardness thus improving the durability and longevity of the AZ91 Mg alloy.