Composite coatings formed on the PEO-layers with the use of solutions of tetrafluoroethylene telomers

Gnedenkov, Sergey V.; Sinebryukhov, Sergey L.; Mashtalyar, D. V.; Nadaraia, Konstantine V.; Kiryukhin, D. P.; Kichigina, G. A.; Kushch, P. P.; Бузник, В. М.

doi:10.1016/j.surfcoat.2018.04.036

Cited by 40 publications

(13 citation statements)

References 53 publications

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“…Hence, the coatings themselves need to degrade while offering a means of corrosion control such that their resistance to the environment is different than that of the underlying alloy. Recent work shows the deposition of a range of barrier coatings from zinc [20] to layer-by-layer coatings which incorporate DNA [22], among others [23][24][25]. Clearly, the degradation products produced by such coated alloys must be biocompatible and ideally bioactive [26].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Control of magnesium alloy corrosion by bioactive calcium phosphate coating: Implications for resorbable orthopaedic implants

et al. 2019

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Control of the corrosion that occurs in magnesium alloys in vivo is a significant challenge for their use as resorbable orthopaedic implants. In this work, we report on the provision of bioactive calcium phosphate (CaP) coatings on magnesium alloys that can delay substrate corrosion while offering an attendant physiochemical environment with properties known to promote an osteoinductive response in vivo. RF magnetron sputtering from hydroxyapatite (HA) powder targets has been employed to create CaP coatings on AZ31 magnesium alloy substrates. Coatings of 70 and 210 nm thickness were achieved via regulation of sputtering parameters, in particular deposition time. XPS and ToF-SIMS were used to investigate the chemistry of the coating alloy interface and also to confirm composition and thickness. The Ca/P atomic ratio of the coatings was determined by EDX to be 1.54. μCT analysis showed a substrate volume loss after 14 days exposure to SBF of 5.89 ± 3.15 mm 3 for the un-coated alloy while the presence of the ~70 nm CaP coating reduced this to 3.42 ± 0.48 mm 3 and the ~210 nm coating to 0.30 ± 0.28 mm 3. The corrosion rates were calculated to be 1.74 ± 0.06 mmpy for the AZ31 control; 1.57 ± 0.09 mmpy for the ~70 nm CaP coated alloy and 1.01 ± 0.07 mmpy for the ~210 nm thick CaP coating. These data confirm that CaP coating

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Section: Accepted Manuscriptmentioning

confidence: 99%

Control of magnesium alloy corrosion by bioactive calcium phosphate coating: Implications for resorbable orthopaedic implants

et al. 2019

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“…The presence of chloride ions in the SBF solution damaged the oxide and hydroxide layers on the surface of the anodized AZ91 alloy and subsequently led to the formation of cavities on the surface, thus resulting in the corrosion of the substrate [11]. As a result, the degradability resistance of the magnesium-based alloy decreased in the SBF medium, thus reducing the total resistance of the implant [36]. Consequently, using this implant in the body will result in the death of the surrounding tissue due to the high release rate of magnesium ions and magnesium hydroxide compounds inside the body.…”

Section: Resultsmentioning

confidence: 99%

Bioactivity Behavior Evaluation of PCL-Chitosan-Nanobaghdadite Coating on AZ91 Magnesium Alloy in Simulated Body Fluid

et al. 2020

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Polymer-ceramic composite coatings on magnesium-based alloys have attracted lots of attention in recent years, to control the speed of degradability and to enhance bioactivity and biocompatibility. In this study, to decrease the corrosion rate in a simulated body fluid (SBF) solution for long periods, to control degradability, and to enhance bioactivity, polycaprolactone-chitosan composite coatings with different percentages of baghdadite (0 wt.%, 3 wt.%, and 5 wt.%) were applied to an anodized AZ91 alloy. According to the results of the immersion test of the composite coating containing 3 wt.% baghdadite in a phosphate buffer solution (PBS), the corrosion rate decreased from 0.45 (for the AZ91 sample) to 0.11 mg/cm 2 ·h after seven days of immersion. To evaluate the apatite formation capability of specimens, samples were immersed in an SBF solution. The results showed that the samples were bioactive as apatite layers formed on the surface of specimens. The composite coating containing 3 wt.% baghdadite showed the highest apatite-formation capability, with a controlled release of ions, and the lowest corrosion rate in the SBF.

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“…), термостойких сверхгидрофобных и антифрикционных защитных покрытий на различные материалы (текстильные, природные целлюлозосодержащие композиционные материалы, дерево, металл и металлические славы, компоненты энергетических композитов и т.д.) [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Предложенные технологии не имеют пока аналогов в мировой практике и защищены рядом патентов [2,[24][25][26][27][28][29].…”

Section: Introductionunclassified

Фторполимерные Композиционные Материалы И Защитные Покрытия Для Экстремальных Условий Арктической Зоны

Кирюхин¹,

Kichigina²,

Кущ³

2020

РХЖ

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Рассмотрены особенности использования радиационно-синтезированных теломеров тетрафторэти-лена для создания новых фторполимерных композиционных материалов и защитных покрытий в экстремальных климатических условиях Арктики. Основное внимание уделено использованию теломеров для гидрофобизации высокопористых теплозащитных, теплоизоляционных материалов на основе кварцевых волокон марок ТКВ (тонкое кварцевое волокно) и ТЗМК-10 и стеклотканей.

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Composite coatings formed on the PEO-layers with the use of solutions of tetrafluoroethylene telomers

Cited by 40 publications

References 53 publications

Control of magnesium alloy corrosion by bioactive calcium phosphate coating: Implications for resorbable orthopaedic implants

Control of magnesium alloy corrosion by bioactive calcium phosphate coating: Implications for resorbable orthopaedic implants

Bioactivity Behavior Evaluation of PCL-Chitosan-Nanobaghdadite Coating on AZ91 Magnesium Alloy in Simulated Body Fluid

Фторполимерные Композиционные Материалы И Защитные Покрытия Для Экстремальных Условий Арктической Зоны

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