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

Materials

Juergen Schmidt¹  AigerimA. Kazakbaeva²  Kateryna Loza³  Oleg Prymak³  Matthias Epple³  VladimirS. Egorkin⁴  SergeyV. Gnedenkov⁴  InnaV. Fadeeva⁵  YuriiP. Sharkeev⁶  MariyaB. Sedelnikova⁶  AllaN. Fomenko⁶  TatianaV. Tolkacheva⁶  MargaritaA. Khimich⁶  OlgaV. Bakina⁶ 

[1] Department of Electrochemistry, Innovent Technology Development, D-07745 Jena, Germany;Faculty of Physics and Engineering, National Research Tomsk State University, Tomsk 634050, Russia;Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany;Institute of Chemistry FEB RAS, Vladivostok 690022, Russia;Institute of Metallurgy and Materials Science of A.A. Baikov of RAS, Moscow 119334, Russia;Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia;

关键词: Sr-tricalcium phosphate;    Sr-hydroxyapatite;    magnesium alloy;    micro-arc oxidation;    biocoatings;    structure;   

DOI  :  10.3390/ma13081942

来源: DOAJ

【 摘 要 】

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 R_a 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.

【 授权许可】

Unknown