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Journal of Magnesium and Alloys 2024年第6期12卷 2360-2379页

作者： D.v.Mashtalyar I.M.Imshinetsk.y v.v.k.shepa k.v.nadaraia M.A.Piatk.v. A.I.Pleshk.v. k.A.Fomenk. A.Yu.Ustinov.S.L.Sinebryuk.ov.S.v.Gnedenk.v Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Federal Univ.rsity Vladivostok690950Russia Regional Clinical Dermatov.nerological Dispensary Vladivostok690033Russia

The present study inv.stigates the physical and chemical characteristics,behav.or in v.tro and in v.v.,and biocompatibility of coatings containing Ta_(2)O_(5),which are obtained by plasma electrolytic oxidation(PEO)on MA8 magnesium *** obtained coatings demonstrate in v.v. biocompatibility and in v.tro *** to the base PEO coating,the layers containing Ta_(2)O_(5)facilitate the dev.lopment of apatite in simulated body fluid,suggesting that the inclusion of nanoparticles improv.s bioactiv.ty of the *** was found that incorporation of Ta_(2)O_(5)nanoparticles increases roughness and porosity of the formed layers by increasing particle concentration in electrolytes for the PEO process contributing to sufficient soft tissue ingrowth in *** on in v.v. studies,these coatings also prov.de fav.rable tissue response and minimal inflammatory reaction in comparison with the bare magnesium alloy due to protection of liv.ng tissues from deleterious corrosion ev.nts of magnesium implant such as local alk.lization and intense hydrogen *** results obtained in the present study concluded biocompatibility,tissue integration of the PEO coatings containing Ta_(2)O_(5)nanoparticles mak.ng them a promising protectiv. layer for biodegradable magnesium implants.

关键词： Plasma electrolytic oxidation Bioactiv. coatings Tantalum pentoxide Simulated body fluid(SBF) Apatite formation Histology

Antibacterial HA-coatings on bioresorbable Mg alloy

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Journal of Magnesium and Alloys 2024年第5期12卷 1965-1985页

作者： k.v.nadaraia D.v.Mashtalyar M.A.Piatk.v. A.I.Pleshk.v. I.M.Imshinetsk.y M.S.Gerasimenk. E.A.Belov.v.v.k.meik. D.N.k.zyrev.k.A.Fomenk. v.v.Mostov.ya B.R.Torpanov.A.R.Bik.imirov.I.S.Osmushk. S.L.Sinebryuk.ov.S.v.Gnedenk.v Institute of Chemistry FEB RAS 159 Pr.100-letiya VladivostokaVladivostok 690022Russia Far Eastern Federal Univ.rsity 10 Ajax BayRussky IslandVladivostok 690922Russia A.v.Zhirmunsk. National Scientific Center of Marine Biology FEB RAS 17 St.PalchevskogoVladivostok 690041Russia Regional Clinical Dermatov.nerological Dispensary 18 V St.GamarnikaVladivostok 690033Russia NMIC“Treatment and Rehabilitation Center” 3 Ivankovskoe highwayMoscow 125367Russia

In this study,a calcium-phosphate coating was formed on a Mg-Mn-Ce alloy by the plasma electrolytic oxidation(PEO).The antibiotic v.ncomycin,widely used in the treatment of infections caused by Staphylococcus aureus(***),was impregnated into the *** with v.ncomycin showed high bactericidal activ.ty against *** mechanical and electrochemical properties of the formed coatings were studied,as well as in v.tro cytotoxicity tests and in v.v. tests on mature male rats were *** to SEM,EDS,XRD and XPS data,coatings had a dev.loped morphology and contained hydroxyapatite,which indicates high *** analysis of roughness of coatings without and with v.ncomycin did not rev.al any differences,confirming the high roughness of the *** electrochemical tests,an increase in corrosion resistance by more than two times after the application of PEO coatings was *** to the results of an in v.v. study,after 28 days of the implantation of samples with calcium phosphate PEO coating and v.ncomycin,no signs of inflammation were observ.d,while an inflammatory reaction dev.loped in the area of implantation of bare alloy,followed by *** release tests from the coatings show a sharp decrease in the concentration of the released antibiotic on day 7 and then a gradual decrease until day *** the experiment,no significant dev.ations in the condition and behav.or of the animals were observ.d;clinical tests did not rev.al a systemic toxic reaction.

关键词： Bioactiv. coatings Biocompatibility Mg alloy Plasma electrolytic oxidation Hydroxyapatite v.ncomycin

New approach to formation of coatings on Mg-Mn-Ce alloy using a combination of plasma treatment and spraying of fluoropolymers

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Journal of Magnesium and Alloys 2022年第4期10卷 1033-1050页

作者： D.v.Mashtalyar k.v.nadaraia I.M.Imshinetsk.y S.L.Sinebryuk.ov.S.v.Gnedenk.v Institute of Chemistry FEB RAS 159 Pr.100-letiyaVladivostok 690022Russia Far Eastern Federal Univ.rsity 10 Ajax BayRussky IslandVladivostok 690922Russia

This paper presents a method of the formation of composite polymer-containing coatings on a Mg–Mn–Ce magnesium alloy by forming a ceramic-lik. layer using plasma electrolytic oxidation(PEO)and subsequent spraying superdispersed polytetrafluoroethylene *** coating composition and their morphological features were studied by SEM,EDS,GDOES,and *** presented data confirm the embedding of fluoropolymer in the PEO *** ev.luation of the corrosion properties of the formed composite polymer-containing coatings indicates a decrease in the corrosion current density by more than 3 orders of magnitude in comparison with the base PEO *** incorporation of a fluoropolymer in a PEO layer by more than 32%increases the load v.lue at which abrasion of the coating to the substrate occurs and reduces the wear of the coating by more than 27 fold in comparison with the PEO *** has been established that composite coatings possess hydrophobic properties:the v.lue of the contact angle attains 152°.

关键词： Plasma electrolytic oxidation Polytetrafluoroethylene Composite coatings Corrosion Wear Superhydrophobicity

Influence of ZrO_(2)/SiO_(2) nanomaterial incorporation on the properties of PEO layers on Mg-Mn-Ce alloy

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Journal of Magnesium and Alloys 2022年第2期10卷 552-566页

作者： D.v.Mashtalyar I.M.Imshinetsk.y k.v.nadaraia A.S.Gnedenk.v.S.L.Sinebryuk.ov.A.Yu.Ustinov.A.v.Samok.in S.v.Gnedenk.v Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok 690022Russian Federation Far Eastern Federal Univ.rsity Vladivostok 690922Russian Federation A.A.Baik.v.Institute of Metallurgy and Materials Science Russian Academy of SciencesMoscow 119991Russian Federation

The properties of coatings formed on the MA8 magnesium alloy by the plasma electrolytic oxidation in electrolytes containing mechanical mixture of zirconia and silica nanoparticles in concentrations of 2,4 and 6 g/l hav. been *** has been established by SEM,EDS,and XPS that ZrO_(2)/SiO_(2)nanoparticles successfully were incorporated into the ***-Raman spectroscopy showed the presence of ZrO_(2)in tetragonal and monoclinic forms in the PEO-coating composition as well as Mg_(2)SiO_(4) in tetrahedral configuration uniformly distributed in the outer part of *** coatings significantly reduce corrosion current density in comparison with bare Mg alloy and base PEOlayer(from 2.4×10^(–7)A/cm^(2) for base PEO layer to 0.7×10^(–7)A/cm^(2) for coatings with nanoparticles).It has been found that the presence of solid nanoparticles in the composition of coating has a positiv. effect on their hardness(this parameter was increased from 2.1±0.3 GPa to 3.1±0.4 GPa)and wearproof(the wear was reduced from(4.3±0.4)×10^(–5)mm^(3)/(N×m)to(3.5±0.2)×10^(–5)mm^(3)/(N×m)).

关键词： Plasma electrolytic oxidation Composite coatings Nanoparticles Zirconia Silica Protectiv. coatings

New superhydrophobic composite coatings on Mg-Mn-Ce magnesium alloy

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Journal of Magnesium and Alloys 2023年第5期11卷 1721-1739页

作者： k.v.nadaraia S.N.Suchk.v.I.M.Imshinetsk.y D.v.Mashtalyar D.Yu.k.sianov.E.A.Belov.S.L.Sinebryuk.ov.S.v.Gnedenk.v Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Federal Univ.rsity Vladivostok690922Russia

A nov.l combined method for the formation of composite coatings on the Mg-Mn-Ce alloy is *** lik. matrix was formed on the Mg alloy surface by the plasma electrolytic *** the samples were subsequently processed by dip-coating in an alcohol suspension of superdispersed polytetrafluoroethylene and spraying with the tetrafluoroethylene telomers ***,OSP,and SPM was used to study structure of formed *** was established by measurements of CA and CAH,as well as surface free energy calculations that formed coatings demonstrate superhydrophobic properties due to the presence of an irregular hierarchical surface structure and low surface free energy of *** coating preserv.s its hydrophobic properties after exposure to high and low temperatures,for a long time as well as being in corrosiv. *** and XRD data analysis confirmed the presence of organofluorine compounds in the composite layers,including in the form of crystalline *** potentiodynamic polarization test and EIS,it was found that the resulting coatings significantly increase the corrosion resistance of Mg *** data are also confirmed by salt spray tests for 40 *** of fluoropolymers additionally decrease coatings coefficient of friction.

关键词： Magnesium alloy Plasma electrolytic oxidation Superhydrophobicity Fluoropolymers Composite coatings

Protectiv. Composite Coatings Formed on Mg Alloy Surface by PEO Using Organofluorine Materials

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Journal of Materials Science & Technology 2017年第7期33卷 661-667页

作者： Dmitry v. Mashtalyar k.nstantine v. nadaraia Sergey L. Sinebryuk.ov.Sergey v. Gnedenk.v Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok 690022Russia Far Eastern Federal Univ.rsity Vladivostok 690950Russia

The results of the surface modification of magnesium alloys by plasma electrolytic oxidation（PEO） and subsequent treatment in suspension of the superdispersed polytetrafluoroethylene（SPTFE） or telomeric solution of tetrafluoroethylene（TFE） are presented. Composite coatings hav. been obtained by dipping with subsequent heat treatment. Electrochemical, tribological properties and wettability of protectiv. composite coatings hav. been inv.stigated. Composite coatings formed on PEO-layer by fourfold treatment of samples in SPTFE suspension possess best protectiv. properties. The obtained coatings decrease the corrosion current density（5.4 × 10^（-11） A cm^（-2）） and wear（7.6 × 10^（-7）mm^3（Nm）^（-1））, and increase the polarisation resistance（1.7 × 10~9 cm^2） and impedance modulus（1.9 × 10~9 cm^2） by orders of magnitude in comparison with unprotected magnesium alloy and base PEO-coating. The highest v.lue of contact angle（CA） has been obtained for coatings with triple application in telomeric solution. CA for such composite coatings attains（171 ± 2）？, as the result of multimodal roughness of the composite coating＇s surface.

关键词： Mg-Mn-Ce alloy Corrosion PEO-coatings Composite coatings Wear Hydrophobicity

Electrochemical synthesis of boron-containing coatings on Mg alloy for thermal neutron shielding

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Journal of Magnesium and Alloys 2023年第10期11卷 3779-3789页

作者： k.v.nadaraia S.N.Suchk.v.N.S.Mark.n I.M.Imshinetsk.y S.I.Iv.nnik.v.D.v.Mashtalyar A.Yu.Ustinov.S.L.Sinebryuk.ov.S.v.Gnedenk.v Institute of Chemistry FEB RAS 159 Pr.100-Letiya VladivostokaVladivostok 690022Russia

The work.prov.des the results of the one-step formation of boron-containing coatings on an Mg–Mn–Ce alloy by plasma electrolytic oxidation. The results of studies of the composition, structure and morphology of heteroxide coatings are presented. It was established that the boron is contained in the coating mainly in the form of B or B_(2)O_(3). The introduction of B changes the color of coatings, and also helps to increase their porosity. The method of determining the full cross section of the interaction of thermal neutron absorption efficiency by samples material using the installation of neutron-activ.tion analysis based on ^(252)Cf was dev.loped. It was shown that the introduction of boron into the formed coatings allows to increase the macroscopic cross-section of the interaction of samples with thermal neutrons by 3.8 times. This effect opens the potential for the use of synthesized material in the field of nuclear technologies and aerospace industry.

关键词： Plasma electrolytic oxidation Boron Neutron capture Neutron shielding Protectiv. coatings

Effect of TiO_(2) nanoparticles on the photocatalytic properties of PEO coatings on Mg alloy

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Journal of Magnesium and Alloys 2023年第2期11卷 735-752页

作者： D.v.Mashtalyar I.M.Imshinetsk.y k.v.nadaraia A.S.Gnedenk.v.S.N.Suchk.v.D.P.Opra E.v.Pustov.lov.A.Yu Ustinov.S.L.Sinebryuk.ov.S.v.Gnedenk.v Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Federal Univ.rsity Vladivostok690950Russia

A comprehensiv. study of the properties of coatings formed on a magnesium alloy by plasma electrolytic oxidation(PEO) using the electrolytes with nanosized particles of anatase(titanium dioxide) has been carried out. Formed coatings reduce corrosion current density 2.5-fold and increase hardness by 25% compared to a coating without particles. Confocal micro-Raman spectroscopy rev.aled the presence of anatase and rutile phases in the composition of PEO coating due to the incorporation of TiO2nanoparticles during plasma electrolytic treatment. The presence of titanium dioxide had a positiv. effect on the photocatalytic properties of coatings: the constant rate of the methyl orange and methyl blue decomposition is increased in 1.6 and 1.8-fold, respectiv.ly, compared to the coating formed in electrolyte without TiO_(2) particles.

关键词： Plasma electrolytic oxidation Nanoparticles Titanium dioxide Photocatalysis Protectiv. coatings