Influence of Oxygen content on the electrochemical behavior of Ta1-xOx coatings

Alves, C.F. Almeida; Calderón, Sebastián; Dias, D.; Carvalho, S.

doi:10.1016/j.electacta.2016.05.188

Cited by 12 publications

(3 citation statements)

References 34 publications

(44 reference statements)

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“…The Bode curves for the ZrN, ZrN+1Ag, and ZrN+2Ag coatings show the formation of two-time constants related to the defects in the coating, providing a direct diffusion path for the corrosive media [3] and to the double-layer capacitance [3,43]. Some authors have reported that the presence of two-time constants is typical for porous coatings [3,[43][44][45]. Finally, at 1 h, the impedance module diagram (Figure 7a) showed better performance of all the samples compared to the 316L stainless steel.…”

Section: Corrosion Resistance Of the Coatingsmentioning

confidence: 95%

Electrochemical and Optical Behavior of ZrN-Ag Coatings Deposited by Means of DC Reactive Magnetron Sputtering Technique

2022

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The formation of nanostructured transition metal nitride coatings by introducing a small amount of silver (Ag) content has been proven to be a good strategy for enhancing the physical properties of these materials. In this investigation, ZrN coatings with different Ag contents were deposited on an AISI 316L substrate using the DC reactive magnetron sputtering technique. The influence of the silver on the chemical composition, morphology, and microstructure was investigated using energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The functional properties, specifically the corrosion resistance and the optical reflectance of the deposited coatings, were investigated using electrochemical impedance spectroscopy (EIS) and UV-Visible-NIR, respectively. The results showed the formation of two nanocrystalline phases, fcc-ZrN and metallic fcc-Ag. On the surface of the deposited coatings, homogeneously distributed silver nanoparticles were observed, and they increased with the Ag atomic content. The chemical composition on the surface showed evidence of the formation of oxides, such as Zr-O and Zr-O-N, before and after the corrosion tests. The corrosion resistance of the AISI 316L substrate and the coatings was improved with the incorporation of Ag, and the optical reflectance increased with increasing the Ag content. Finally, this work investigated the effect of the incorporation of silver into a ZrN matrix for potential use as optical protective coatings.

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Section: Corrosion Resistance Of the Coatingsmentioning

confidence: 95%

Electrochemical and Optical Behavior of ZrN-Ag Coatings Deposited by Means of DC Reactive Magnetron Sputtering Technique

2022

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“…Magnetron sputtering method [318][319][320] High speed of coating formation at low vacuum of 0.1-1 Pa; no overheating of the substrate. Magnetron sputtering can be carried out both on direct and alternating currents.…”

Section: Physical Techniquesmentioning

confidence: 99%

Dental Implants: Modern Materials and Methods of Their Surface Modification

Sotova,

Yanushevich,

Kriheli

et al. 2023

Materials

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The development of dental implantology is based on the detailed study of the interaction of implants with the surrounding tissues and methods of osteogenesis stimulation around implants, which has been confirmed by the increasing number of scientific publications presenting the results of studies related to both the influence of the chemical composition of dental implant material as well as the method of its surface modification on the key operational characteristics of implants. The main materials for dental implant manufacturing are Ti and its alloys, stainless steels, Zr alloys (including ceramics based on ZrO2), and Ta and its alloys, as well as other materials (ceramics based on Al2O3, Si3N4, etc.). The review presents alloy systems recommended for use in clinical practice and describes their physical–mechanical and biochemical properties. However, when getting into the body, the implants are subjected to various kinds of mechanical influences, which are aggravated by the action of an aggressive biological environment (electrolyte with a lot of Cl− and H+); it can lead to the loss of osteointegration and to the appearance of the symptoms of the general intoxication of the organism because of the metal ions released from the implant surface into the biological tissues of the organism. Since the osteointegration and biocompatibility of implants depend primarily on the properties of their surface layer (it is the implant surface that makes contact with the tissues of the body), the surface modification of dental implants plays an important role, and all methods of surface modification can be divided into mechanical, physical, chemical, and biochemical methods (according to the main effect on the surface). This review discusses several techniques for modifying dental implant surfaces and provides evidence for their usefulness.

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“…Tantalum oxide (Ta 2 O 5 ) micro-structured coatings present interesting properties that make them suitable for a large range of applications. These coatings are used for storage capacitors and resistors in electronic [ 1 , 2 ] and microelectronic industries [ 1 , 3 , 4 ] because they show a high dielectric strength, high melting point and thermal stability [ 5 ], excellent corrosion [ 6 , 7 , 8 , 9 ], and abrasion resistance [ 10 ], which make them also a reliable option for biomedical instruments [ 6 , 7 , 11 , 12 , 13 , 14 ] and chemical equipment (e.g., optical devices) [ 15 ]. They are biocompatible [ 16 , 17 , 18 , 19 ] too, being a good option for bioengineering implants application [ 6 , 11 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

A Decade of Progress on MAO-Treated Tantalum Surfaces: Advances and Contributions for Biomedical Applications

2022

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Micro-structured coatings with functional properties have been investigated due to a wide range of applications. It is known that micro-structures can play an important role in surface interactions determining the materials’ performance. Amongst the other materials, there has been an increasing interest in tantalum oxide (Ta2O5). This attention is mainly due to its variety of properties: biocompatibility and bioactivity; high dielectric constant; good thermal and chemical stability; excellent corrosion and mechanical resistance. Moreover, there is a wide range of applications in which the properties can be fitted. Furthermore, according to the final application, these properties can be enhanced or tailored through surface micro-structures manipulation. Due to this purpose, over the past decade, Ta surface modification by micro-arc oxidation (MAO) has been investigated mostly for biomedical applications. Therefore, this review focuses on Ta surface functionalization using the MAO technique. A clear understanding of the micro-discharge phenomena and the formation mechanism of a Ta2O5 anodic coating by MAO is supplied. The Ta2O5 coating morphology, topography, chemistry, and structure are explored, establishing their correlation with the MAO parameters. Additionally, an understanding of Ta2O5’s biological, mechanical, and electrochemical properties is provided and reviewed.

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Influence of Oxygen content on the electrochemical behavior of Ta1-xOx coatings

Cited by 12 publications

References 34 publications

Electrochemical and Optical Behavior of ZrN-Ag Coatings Deposited by Means of DC Reactive Magnetron Sputtering Technique

Electrochemical and Optical Behavior of ZrN-Ag Coatings Deposited by Means of DC Reactive Magnetron Sputtering Technique

Dental Implants: Modern Materials and Methods of Their Surface Modification

A Decade of Progress on MAO-Treated Tantalum Surfaces: Advances and Contributions for Biomedical Applications

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