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Article

Comparative Study of the Structure, Properties, and Corrosion Behavior of Sr-Containing Biocoatings on Mg0.8Ca

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Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
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Research School of High-Energy Physics, National Research Tomsk Polytechnic University, Tomsk 634050, Russia
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Faculty of Physics and Engineering, National Research Tomsk State University, Tomsk 634050, Russia
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Institute of Metallurgy and Materials Science of A.A. Baikov of RAS, Moscow 119334, Russia
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Institute of Chemistry FEB RAS, Vladivostok 690022, Russia
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Department of Electrochemistry, Innovent Technology Development, D-07745 Jena, Germany
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Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
*
Author to whom correspondence should be addressed.
Materials 2020, 13(8), 1942; https://doi.org/10.3390/ma13081942
Received: 20 March 2020 / Revised: 13 April 2020 / Accepted: 15 April 2020 / Published: 20 April 2020
(This article belongs to the Special Issue Bioabsorbable and Permanent Materials for Highly Loaded Implants)
A comparative analysis of the structure, properties and the corrosion behavior of the micro-arc coatings based on Sr-substituted hydroxyapatite (Sr-HA) and Sr-substituted tricalcium phosphate (Sr-TCP) deposited on Mg0.8Ca alloy substrates was performed. The current density during the formation of the Sr-HA coatings was higher than that for the Sr-TCP coatings. As a result, the Sr-HA coatings were thicker and had a greater surface roughness Ra than the Sr-TCP coatings. In addition, pore sizes of the Sr-HA were almost two times larger. The ratio (Ca + Sr + Mg)/P were equal 1.64 and 1.47 for Sr-HA and Sr-TCP coatings, respectively. Thus, it can be assumed that the composition of Sr-HA and Sr-TCP coatings was predominantly presented by (Sr,Mg)-substituted hydroxyapatite and (Sr,Mg)-substituted tricalcium phosphate. However, the average content of Sr was approximately the same for both types of the coatings and was equal to 1.8 at.%. The Sr-HA coatings were less soluble and had higher corrosion resistance than the Sr-TCP coatings. Cytotoxic tests in vitro demonstrated a higher cell viability after cultivation with extracts of the Sr-HA coatings. View Full-Text
Keywords: Sr-tricalcium phosphate; Sr-hydroxyapatite; magnesium alloy; micro-arc oxidation; biocoatings; structure; corrosion resistance; cell viability Sr-tricalcium phosphate; Sr-hydroxyapatite; magnesium alloy; micro-arc oxidation; biocoatings; structure; corrosion resistance; cell viability
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MDPI and ACS Style

Sedelnikova, M.B.; Sharkeev, Y.P.; Tolkacheva, T.V.; Khimich, M.A.; Bakina, O.V.; Fomenko, A.N.; Kazakbaeva, A.A.; Fadeeva, I.V.; Egorkin, V.S.; Gnedenkov, S.V.; Schmidt, J.; Loza, K.; Prymak, O.; Epple, M. Comparative Study of the Structure, Properties, and Corrosion Behavior of Sr-Containing Biocoatings on Mg0.8Ca. Materials 2020, 13, 1942. https://doi.org/10.3390/ma13081942

AMA Style

Sedelnikova MB, Sharkeev YP, Tolkacheva TV, Khimich MA, Bakina OV, Fomenko AN, Kazakbaeva AA, Fadeeva IV, Egorkin VS, Gnedenkov SV, Schmidt J, Loza K, Prymak O, Epple M. Comparative Study of the Structure, Properties, and Corrosion Behavior of Sr-Containing Biocoatings on Mg0.8Ca. Materials. 2020; 13(8):1942. https://doi.org/10.3390/ma13081942

Chicago/Turabian Style

Sedelnikova, Mariya B., Yurii P. Sharkeev, Tatiana V. Tolkacheva, Margarita A. Khimich, Olga V. Bakina, Alla N. Fomenko, Aigerim A. Kazakbaeva, Inna V. Fadeeva, Vladimir S. Egorkin, Sergey V. Gnedenkov, Juergen Schmidt, Kateryna Loza, Oleg Prymak, and Matthias Epple. 2020. "Comparative Study of the Structure, Properties, and Corrosion Behavior of Sr-Containing Biocoatings on Mg0.8Ca" Materials 13, no. 8: 1942. https://doi.org/10.3390/ma13081942

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