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In vitro biodegradation, electrochemical corrosion evaluations and mechanical properties of an Mg/HA/TiO2 nanocomposite for biomedical applications

Khalajabadi, S. Z. and Ahmad, N. and Izman, S. and Abu, A. B. and Haider, W. and Abdul Kadir, M. R. (2017) In vitro biodegradation, electrochemical corrosion evaluations and mechanical properties of an Mg/HA/TiO2 nanocomposite for biomedical applications. Journal of Alloys and Compounds, 696 . pp. 768-781. ISSN 0925-8388

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Official URL: http://dx.doi.org/10.1016/j.jallcom.2016.11.106

Abstract

In this study, a biodegradable Mg/HA/TiO2nanocomposite was prepared using a milling-pressing-sintering powder metallurgy technique. The combined effects of hydroxyapatite (HA) and titania (TiO2) on the corrosion behavior of pure Mg were investigated via in vitro immersion and electrochemical tests in a simulated body fluid (SBF), and changes in the mechanical properties were analyzed using a compression test. Furthermore, X-ray diffraction, Fourier-transform infrared spectroscopy, atomic-force microscopy, field-emission scanning electron microscopy and transmission electron microscopy were used to investigate the composition and microstructure of the Mg/HA/TiO2bionanocomposite as well as the morphology of the corrosion products. The corrosion rate of the Mg/HA nanocomposite decreased both in terms of mass loss and hydrogen evolution with a decrease in HA from 27.5 to 5 wt% and an addition of 15 wt% TiO2. By sintering the Mg/HA/TiO2nanocomposites, MgTiO3nanoflakes were formed with a hierarchical microstructure on the surface of the samples. The compression and electrochemical tests indicated that the ternary Mg/12.5HA/10TiO2nanocomposite had a good combination of mechanical properties and corrosion resistance of 12.17 kΩ cm2in the SBF solution. The cell culture results indicated that the Mg/HA/TiO2nanocomposite was biocompatible with osteoblasts.

Item Type:Article
Uncontrolled Keywords:biodegradation, cell culture, contact angle
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:80376
Deposited By: Narimah Nawil
Deposited On:10 May 2019 15:18
Last Modified:10 May 2019 15:18

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