Microstructural, Electrochemical and Biocompatibility Investigation of TiO2 Coating on AZ91D by magnetron sputtering method

Document Type : Research Article

Authors

Department of Metallurgy and Materials Engineering, Karaj Branch, Islamic Azad University Karaj, Iran.

/amnc.2020.8.31.4

Abstract

In this study, due to the poor corrosion resistance of Mg alloys in aquatic environments, TiO2 ceramic coating applied by the magnetron sputtering technique to enhance the corrosion resistance and biocompatibility of AZ91D alloy. The Microstructural studies by field emission scanning electron microscopy (FESEM) and X-Ray diffraction (XRD) analysis showed that the coating formed uniformly with semi spherical morphology containing TiO2, Mg2TiO4 and MgTi2O5 spinels, so that above of the substrate was Ti diffiusion affected. The polarization corrosion test in simulated body fluid (SBF) solution showed that applying the coating by reducing the corrosion current by about 100 times improves the corrosion resistance of the magnesium substrate so that MTT results show that density and number of cells on the coated sample is higher than substrate without coating due to cell joint stronger. The viability of MG67 cells on the samples increased from 77% in the substrate to 89% in the coated sample.

Keywords

References

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