Electrochemical behavior of the Ti6Al4V alloy implanted by nitrogen PIII

Savonov, Graziela S.; Ueda, M.; Oliveira, R. M.; Otani, C.

doi:10.1016/j.surfcoat.2011.09.007

Cited by 11 publications

(13 citation statements)

References 16 publications

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“…Cyclic potentiodynamic polarization curves were recorded starting from a value of about 300 mV more negative than the open circuit potential and continue to positive direction till +1000 mV (versus SCE) with a scan arte of 1 mV/s. The main electrochemical parameters were determined: E corr : corrosion potential as zero current potential; E p : passivation potential where the current density becomes constant; | E corr − E p |: tendency to passivation with low values characterizes a strong, easy passivation; i p : passive current density representing the corrosion resistance of the passive layer [ 37 , 44 , 45 , 50 ].…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, an important restriction for a good material is its high corrosion resistance, high stability, and chemical inertness in the human biofluids [ 37 , 39 – 42 ]. The nitride coatings can confer high corrosion protection and wear resistance to the implant alloys [ 43 – 45 ], maintaining good mechanical properties and biocompatibility [ 43 , 46 ]. Huang et al [ 47 ] reported that TiN film was deposited onto the Ti substrate using the cathodic arc plasma deposition technique and ion-nitriding treatment improved corrosion resistance and osteoblast-like cell adhesion.…”

Section: Introductionmentioning

confidence: 99%

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Biological Behaviour and Enhanced Anticorrosive Performance of the Nitrided Superelastic Ti-23Nb-0.7Ta-2Zr-0.5N Alloy

Mitran

Vasilescu

Drob

et al. 2015

BioMed Research International

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The influence of gas nitriding surface treatment on the superelastic Ti-23Nb-0.7Ta-2Zr-0.5N alloy was evaluated. A thorough characterization of bare and nitrided Ti-based alloy and pure Ti was performed in terms of surface film composition and morphology, electrochemical behaviour, and short term osteoblast response. XPS analysis showed that the nitriding treatment strongly influenced the composition (nitrides and oxynitrides) and surface properties both of the substrate and of the bulk alloy. SEM images revealed that the nitrided surface appears as a similar dotted pattern caused by the formation of N-rich domains coexisting with less nitrided domains, while before treatment only topographical features could be observed. All the electrochemical results confirmed the high chemical stability of the nitride and oxynitride coating and the superiority of the applied treatment. The values of the corrosion parameters ascertained the excellent corrosion resistance of the coated alloy in the real functional conditions from the human body. Cell culture experiments with MG63 osteoblasts demonstrated that the studied biomaterials do not elicit any toxic effects and support cell adhesion and enhanced cell proliferation. Altogether, these data indicate that the nitrided Ti-23Nb-0.7Ta-2Zr-0.5N alloy is the most suitable substrate for application in bone implantology.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biological Behaviour and Enhanced Anticorrosive Performance of the Nitrided Superelastic Ti-23Nb-0.7Ta-2Zr-0.5N Alloy

Mitran

Vasilescu

Drob

et al. 2015

BioMed Research International

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“…30 Improvement of the values of i corr , V corr , ion release rate, and R p for the nitrided Ti-27Nb alloy prove that the nitride layer formed in surface acts as a very protective barrier and confers a high chemical stability to the substrate. 26,[32][33][34][35] For biocompatibility tests, three cell culture lines were used in this study: bone cells (SaOS 2 ), oral epithelial cells (KB) and fibroblastic cells (L929) in order to be close to clinical conditions. Cell growth and metabolic activity of cells were investigated on nitrided and non-nitrided Ti-27Nb alloy for comparison.…”

Section: Discussionmentioning

confidence: 99%

Enhancement of the biocompatibility by surface nitriding of a low‐modulus titanium alloy for dental implant applications

et al. 2018

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To enhance their longevity dental implants must be highly biocompatible and must have a low elastic modulus close to that of the bone. They must also possess a high superficial hardness and a high corrosion resistance. For these reasons a recently developed low modulus Ti-27Nb alloy with non-toxic elements was treated by gas nitriding at high temperature in this study. A very thin nitrided layer of 0.5µm in thickness followed by an enriched nitrogen zone was observed. Consequently, a very high hardness evaluated at about 1800 HV was obtained in surface, which represents an increase of 4-5 times the hardness of the non nitrided alloy. This superficial hardness was experimentally observed to decrease up to 800 nm in depth from the surface to the core. The low modulus of Ti-27Nb (evaluated at 55 GPa, which is twice lower than the commercially pure titanium) was not affected by the surface nitriding treatment. A better corrosion resistance was observed as well as a significant decrease in ion release rates for the nitrided alloy (ion release of 1.41 ng/cm 2 compared to the 163.58 ng/cm 2 obtained for the commercially pure titanium at pH=7.48 in artificial Carter-Brugirard saliva). The cytocompatibility was not compromised and the cell viability performed on human osteoblasts, fibroblastic cells and epithelial cells was enhanced on the nitrided surface in comparison with the non-nitrided surface. These combined properties make the nitrided Ti-27Nb alloy a good candidate for dental implant applications.

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“…Surface modification by ion implantation is another potential method of changing the surface properties [50]. The surface properties can be increased by plasma surface treatments.…”

Section: Grit Blastingmentioning

confidence: 99%

Enhancing the Properties of Ti6Al4V as a Biomedical Material: A Review

Annamalai¹,

Kavitha²,

Ramji³

2014

TOMSJ

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Abstract:The alloy Ti 6 Al 4 V has evolved as a good biomedical material, by virtue of its bio-compatibility. In order to make implants out of this material, it has to be shaped and processed. Shaping this material by conventional manufacturing methods like machining, welding and brazing presents a huge challenge. This challenge has been met by various approaches like additive manufacturing, surface alloying and heat treatment. Additive manufacturing processes are used for shaping; coatings and surface alloying are used for property improvement; heat treatment is used for improving the machinability. The processing method has an impact on the final properties of the product. This review attempts to trace the development of methods and practices for converting Ti 6 Al 4 V into a useful material for biomedical applications.

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Electrochemical behavior of the Ti6Al4V alloy implanted by nitrogen PIII

Cited by 11 publications

References 16 publications

Biological Behaviour and Enhanced Anticorrosive Performance of the Nitrided Superelastic Ti-23Nb-0.7Ta-2Zr-0.5N Alloy

Biological Behaviour and Enhanced Anticorrosive Performance of the Nitrided Superelastic Ti-23Nb-0.7Ta-2Zr-0.5N Alloy

Enhancement of the biocompatibility by surface nitriding of a low‐modulus titanium alloy for dental implant applications

Enhancing the Properties of Ti6Al4V as a Biomedical Material: A Review

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