TY - JOUR
T1 - Comparative study of the structure, properties, and corrosion behavior of Sr-containing biocoatings on Mg0.8Ca
AU - Sedelnikova, Mariya B.
AU - Sharkeev, Yurii P.
AU - Tolkacheva, Tatiana V.
AU - Khimich, Margarita A.
AU - Bakina, Olga V.
AU - Fomenko, Alla N.
AU - Kazakbaeva, Aigerim A.
AU - Fadeeva, Inna V.
AU - Egorkin, Vladimir S.
AU - Gnedenkov, Sergey V.
AU - Schmidt, Juergen
AU - Loza, Kateryna
AU - Prymak, Oleg
AU - Epple, Matthias
PY - 2020/4/1
Y1 - 2020/4/1
N2 - 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.
AB - 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.
KW - Biocoatings
KW - Cell viability
KW - Corrosion resistance
KW - Magnesium alloy
KW - Micro-arc oxidation
KW - Sr-hydroxyapatite
KW - Sr-tricalcium phosphate
KW - Structure
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U2 - 10.3390/MA13081942
DO - 10.3390/MA13081942
M3 - Article
AN - SCOPUS:85084805638
VL - 13
JO - Materials
JF - Materials
SN - 1996-1944
IS - 8
M1 - 1942
ER -