Metals is an international, peer-reviewed, open access journal published monthly online by MDPI. The Portuguese Society of Materials (SPM), and the Spanish Materials Society (SOCIEMAT) are affiliated with Metals and their members receive a discount on the article processing charges. http://hdl.handle.net/20.500.12701/1729 2024-02-22T12:03:38Z 2024-02-22T12:03:38Z 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 http://hdl.handle.net/20.500.12701/1734 2022-03-28T06:00:55Z 2018-04-04T00:00:00Z

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 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.

2018-04-04T00:00:00Z