Bioactive Materials is an international, peer-reviewed research publication covering all aspects of bioactive materials. http://hdl.handle.net/20.500.12701/1609 2024-05-03T12:20:32Z 2024-05-03T12:20:32Z Sedelnikova, M.B. Komarova, E.G. Sharkeeva, Yu.P. Tolkacheva, T.V. Khlusov, I.A. Litvinova, L.S. Yurova, K.A. Shupletsova, V.V. http://hdl.handle.net/20.500.12701/1750 2022-03-29T09:05:13Z 2017-02-13T00:00:00Z

Название: Comparative investigations of structure and properties of micro-arc wollastonite-calcium phosphate coatings on titanium and zirconium-niobium alloy Авторы: Sedelnikova, M.B.; Komarova, E.G.; Sharkeeva, Yu.P.; Tolkacheva, T.V.; Khlusov, I.A.; Litvinova, L.S.; Yurova, K.A.; Shupletsova, V.V. Краткий осмотр (реферат): Investigation results of micro-arc wollastonite–calcium phosphate (W–CaP) biocoatings on the pure titanium (Ti) and Zr–1wt.%Nb (Zr–1Nb) alloy were presented. The voltages of 150–300 V generate the micro-arc oxidation (MAO) process with the initial amplitude current of 150–550 A and 100–350 A for Ti and Zr–1Nb substrates, respectively. The identical dependencies of changes of the coating thickness, surface roughness and adhesion strength on the process voltage were revealed for the both substrates. The W–CaP coatings with the thickness of 10–11 μm were formed on Ti and Zr–1Nb under the low process voltage of 130–150 V. Elongated wollastonite particles with the size in the range of 40–100 μm were observed in such coatings. The structure of the coatings on Ti was presented by the X–ray amorphous and crystalline phases. The X–ray reflexes relating to the crystalline phases of Ti and wollastonite were observed only in XRD patterns of the coatings deposited under 130–200 V on Ti. While, the crystalline structure with phases of CaZr4(PO4)6, β–ZrP2O7, ZrO2, and Zr was detected in the coatings on Zr–1Nb. FT–IRS, XRD, SEM, and TEM data confirmed that the increase of the process voltage to 300 V leads to the dissociation of the wollastonite. No toxic effect of specimens on a viability, morphology and motility of human adipose–derived multipotent mesenchymal stem cells was revealed in vitro.

2017-02-13T00:00:00Z Sedelnikova, Mariya B. Komarova, Ekaterina G. Sharkeev, Yurii P. Ugodchikova, Anna V. Tolkacheva, Tatiana V. Rau, Julietta V. Buyko, Evgeny E. Ivanov, Vladimir V. Sheikin, Vladimir V. http://hdl.handle.net/20.500.12701/1610 2022-03-29T09:08:22Z 2019-08-02T00:00:00Z

Название: Modification of titanium surface via Ag-, Sr- and Si-containing micro-arc calcium phosphate coating Авторы: Sedelnikova, Mariya B.; Komarova, Ekaterina G.; Sharkeev, Yurii P.; Ugodchikova, Anna V.; Tolkacheva, Tatiana V.; Rau, Julietta V.; Buyko, Evgeny E.; Ivanov, Vladimir V.; Sheikin, Vladimir V. Краткий осмотр (реферат): The current research is devoted to the study of the modification of the titanium implants by the micro-arc oxidation with bioactive calcium phosphate coatings containing Ag or Sr and Si elements. The coatings’ microstructure, phase composition, morphology, physicochemical and biological properties were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). Ag-containing and Sr-Si-incorporated coatings were formed in alkaline and acid electrolytes, respectively. The formation of the coatings occurred at different ranges of the applied voltages, which led to the significant difference in the coatings properties. The trace elements Ag, Sr and Si participated intensively in the plasma-chemical reactions of the micro-arc coatings formation. Ag-containing coatings demonstrated strong antibacterial effect against Staphylococcus aureus AТСС 6538-P. MTT in vitro test with 3T3-L1 fibroblasts showed no cytotoxicity appearance on Sr-Si-incorporated coatings.

2019-08-02T00:00:00Z