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Fabrication, degradation behavior and cytotoxicity of nanostructured hardystonite and titania/hardystonite coatings on Mg alloys

Bakhsheshi-Rad, H. R. and Hamzah, E. and Kasiri-Asgarani, M. and Jabbarzare, S. and Daroonparvar, M. and Najafinezhad, A. (2016) Fabrication, degradation behavior and cytotoxicity of nanostructured hardystonite and titania/hardystonite coatings on Mg alloys. Vacuum, 129 . pp. 9-12. ISSN 0042-207X

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Abstract

In this study, nanostructured hardystonite (HT) and titania (TiO2)/hardystonite (HT) dual-layered coatings were deposited on biodegradable Mg-Ca-Zn alloy via physical vapor deposition (PVD) combined with electrophoretic deposition (EPD). Although a single layer nano-HT coating can decrease the corrosion rate from 1.68 to 1.02 mm/year, due to the presence of porosities and microcracks, the nano-HT layer cannot sufficiently protect the Mg substrate. In contrast, the corrosion resistance of nano-HT coating is further improved by using nano-TiO2 underlayer since it was a smooth, very uniform and compact layer with higher contact angle (52.30°). In addition, the MTT assay showed the viability of MC3T3-E1 on the nano-HT and nano-TiO2/HT coatings. The results demonstrated that the two-step surface modification improved both corrosion resistance and the cytocompatibility of the Mg alloy, hence making it feasible for orthopedic applications.

Item Type:Article
Uncontrolled Keywords:Calcium alloys, Coatings, Corrosion, Corrosion rate, Corrosion resistance, Cytotoxicity, Deposition, Electrophoresis, Electrophoretic coatings, Physical vapor deposition, Surface treatment, Vapor deposition, Corrosion behavior, Cytocompatibility, Degradation behavior, Electrophoretic depositions, Hardystonite, Mg alloy, Orthopedic applications, Titania, Titanium dioxide
Subjects:H Social Sciences > HD Industries. Land use. Labor > HD28 Management. Industrial Management
Divisions:Mechanical Engineering
ID Code:72384
Deposited By: Narimah Nawil
Deposited On:20 Nov 2017 16:23
Last Modified:20 Nov 2017 16:23

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