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Название: Characterization of the Micro-Arc Coatings Containing β-Tricalcium Phosphate Particles on Mg-0.8Ca Alloy
Авторы: Sedelnikova, Mariya B.
Komarova, Ekaterina G.
Sharkeev, Yurii P.
Tolkacheva, Tatiana V.
Sheikin, Vladimir V.
Egorkin, Vladimir S.
Mashtalyar, Dmitry V.
Kazakbaeva, Aigerim A.
Schmidt, Juergen
Ключевые слова: micro-arc oxidation
calcium phosphate coating
β-tricalcium phosphate
magnesium alloy
microstructure
corrosion resistance
Дата публикации: 4-апр-2018
Издательство: MDPI
Серия/номер: Metals;Volume 8, Issue 4
Краткий осмотр (реферат): The characterization of the microstructure, morphology, topography, composition, and physical and chemical properties of the coatings containing β-tricalcium phosphate (β-TCP) particles deposited by the micro-arc oxidation (MAO) method on biodegradable Mg-0.8Ca alloy has been performed. The electrolyte for the MAO process included the following components: Na2HPO4·12H2O, NaOH, NaF, and β-Ca3(PO4)2 (β-TCP). The coating morphology, microstructure, and compositions have been studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). With increasing of the MAO voltage from 350 to 500 V, the coating thickness and surface average roughness of the coatings increased linearly from 6 to 150 µm and from 2 to 8 µm, respectively. The coating deposited at 350 V had more homogeneous porous morphology with numerous pores similar by sizes (2–3 µm) than the coatings formed at 450–500 V. The β-TCP isometric particles were included in the coating surface. The XRD recognized the amorphous-crystalline structure in the coatings with incorporation of the following phases: β-TCP, α-TCP, MgO (periclase) and hydroxyapatite (HA). The corrosion experiments showed that the biodegradation rate of the Mg-0.8Ca alloy coated by calcium phosphates is almost 10 times less than that of uncoated alloy.
URI (Унифицированный идентификатор ресурса): https://doi.org/10.3390/met8040238
http://hdl.handle.net/20.500.12701/1734
Располагается в коллекциях:Metals

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