Structure and properties of micro-arc calcium phosphate coatings on pure titanium and Ti–40Nb alloy

Sharkeev, Yurii P.; Комарова, Е. Г.; Sedelnikova, M. B.; Sun, Zhenzhen; Zhu, Qiang; Zhang, Jing; Толкачева, Т. В.; Уваркин, П. В.

doi:10.1016/s1003-6326(17)60014-1

Cited by 22 publications

(19 citation statements)

References 13 publications

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“…The average roughness (Ra) of the samples was 0.3-0.5 µm. In order to realize the MAO method for deposition of coatings, the Micro-Arc 3.0 installation was used as in the previous works [32][33][34]. The installation consists of pulsed power source, galvanic bath with water cooling system, molybdenum electrodes, and personal computer with Micro-Arc 3.0 software for the MAO process controlling.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Usually, researchers [21,22,28,29] carry out the MAO process using a potentiodynamic regime with the constant current density. In presented work, the CaP coating deposition was carried out using the anode potentiostatic regime under the fixed voltages [32][33][34]. In this case, the current density decreased during the MAO process due to the growth of dielectric CaP coatings as shown in Figure 2.…”

Section: Regularities Of Formation Of the Cap Coatings On The Mg Alloymentioning

confidence: 99%

“…), the electrolyte composition, and type of the substrate material (Ti, Nb, Zr, Mg, etc.) [24,25,28,[32][33][34]. Generally, the researchers have implemented the MAO processing of valve metals in electrolytic true solutions for production of biocoatings.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the researchers have implemented the MAO processing of valve metals in electrolytic true solutions for production of biocoatings. However, our previous works [32][33][34] and works of another authors [35][36][37][38][39] showed that the usage of electrolytic suspension with incorporation of nanoparticles of CaP compounds, in particular, hydroxyapatite (HA), promotes to form the thick (~100 µm) coatings with developed surface and the unique complex of electrochemical and biological properties. Recently, Santos et al [38] demonstrated the one-step fabrication of a novel graphene oxide/HA nanoparticles/phosphate coating for better biocompatibility and osteointegration of ultrahigh-purity Mg implant.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of the Micro-Arc Coatings Containing β-Tricalcium Phosphate Particles on Mg-0.8Ca Alloy

Sedelnikova

Комарова

Sharkeev

et al. 2018

Metals

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The characterization of the microstructure, morphology, topography, composition, and physical and chemical properties of the coatings containing β-tricalcium phosphate (β-TCP) particles deposited by the micro-arc oxidation (MAO) method on biodegradable Mg-0.8Ca alloy has been performed. The electrolyte for the MAO process included the following components: Na 2 HPO 4 •12H 2 O, NaOH, NaF, and β-Ca 3 (PO 4) 2 (β-TCP). The coating morphology, microstructure, and compositions have been studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). With increasing of the MAO voltage from 350 to 500 V, the coating thickness and surface average roughness of the coatings increased linearly from 6 to 150 µm and from 2 to 8 µm, respectively. The coating deposited at 350 V had more homogeneous porous morphology with numerous pores similar by sizes (2-3 µm) than the coatings formed at 450-500 V. The β-TCP isometric particles were included in the coating surface. The XRD recognized the amorphous-crystalline structure in the coatings with incorporation of the following phases: β-TCP, α-TCP, MgO (periclase) and hydroxyapatite (HA). The corrosion experiments showed that the biodegradation rate of the Mg-0.8Ca alloy coated by calcium phosphates is almost 10 times less than that of uncoated alloy.

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Section: Sample Preparationmentioning

confidence: 99%

Section: Regularities Of Formation Of the Cap Coatings On The Mg Alloymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of the Micro-Arc Coatings Containing β-Tricalcium Phosphate Particles on Mg-0.8Ca Alloy

Sedelnikova

Комарова

Sharkeev

et al. 2018

Metals

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“…Methods such as sol-gel (Asri et al, 2016), chemical (Wen et al, 1998), micro arc oxidation (Sedelnikova et al, 2016;Sharkeev et al, 2017), and others. Among them, the method of radiofrequency (RF) magnetron sputtering stands out.…”

mentioning

confidence: 99%

Thin Bioactive Zn Substituted Hydroxyapatite Coating Deposited on Ultrafine-Grained Titanium Substrate: Structure Analysis

et al. 2018

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Nanocrystalline Zn-substituted hydroxyapatite coatings were deposited by radiofrequency magnetron sputtering on the surface of ultrafine-grained titanium substrates. Cross-section transmission electron microscopy provided information about the morphology and texture of the thin film while in-column energy dispersive X-ray analysis confirmed the presence of Zn in the coating. The Zn-substituted hydroxyapatite coating was formed by an equiaxed polycrystalline grain structure. Effect of substrate crystallinity on the structure of deposited coating is discussed. An amorphous TiO2 sublayer of 8-nm thickness was detected in the interface between the polycrystalline coating and the Ti substrate. Its appearance in the amorphous state is attributed to prior to deposition etching of the substrate and subsequent condensation of oxygen-containing species sputtered from the target. This layer contributes to the high coating-to-substrate adhesion. The major P-O vibrational modes of high intensity were detected by Raman spectroscopy. The Zn-substituted hydroxyapatite could be a material of choice when antibacterial osteoconductive coating with a possibility of withstanding mechanical stress during implantation and service is needed.

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A Review on Bio-functionalization of β-Ti Alloys

et al. 2020

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Structure and properties of micro-arc calcium phosphate coatings on pure titanium and Ti–40Nb alloy

Cited by 22 publications

References 13 publications

Characterization of the Micro-Arc Coatings Containing β-Tricalcium Phosphate Particles on Mg-0.8Ca Alloy

Characterization of the Micro-Arc Coatings Containing β-Tricalcium Phosphate Particles on Mg-0.8Ca Alloy

Thin Bioactive Zn Substituted Hydroxyapatite Coating Deposited on Ultrafine-Grained Titanium Substrate: Structure Analysis

A Review on Bio-functionalization of β-Ti Alloys

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