Bakhsheshi-Rad, H. R. and Hamzah, E. and Daroonparvar, M. and Abdul Kadir, M. R. and Kasiri-Asgarani, M. and Staiger, M. P. (2016) Enhancement of corrosion resistance and mechanical properties of Mg–1.2Ca–2Bi via a hybrid silicon-biopolymer coating system. Surface and Coatings Technology, 301 . pp. 133-139. ISSN 0257-8972
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Abstract
In this work, a hybrid dual layer surface coating consisting of a silicon (Si) underlayer and poly(ε-caprolactone) (PCL) overlayer was investigated that was designed to reduce the corrosion rates of magnesium-based biomaterials. The Si underlayer was 1.2 μm thick and composed of spherical nanoparticles. The overlayer of PCL was 75.2 μm thick and comprised network of pores. Corrosion-induced reduction of the compressive strength of a Si/PCL-coated Mg–Ca–Bi alloy was lower than that of the uncoated or Si layer-coated alloys. However, the bonding strength of the Si coating (24.6 MPa) was significantly higher than that of the Si/PCL-coated samples (6.8 MPa). The Si/PCL coating dramatically enhances the charge transfer resistance of the Mg alloy (2.11 kΩ cm2) in simulated body fluid when compared with a Si-coated sample (2265.12 kΩ cm2). Si/PCL coatings are considered a promising route to control the corrosion rate and mechanical properties of Mg-based biomaterials.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Biomaterials, Charge transfer, Coatings, Compressive strength, Corrosion, Corrosion rate, Corrosion resistance, Magnesium, Mechanical properties, Microstructure, Polycaprolactone, Silicon, Biopolymer coatings, Bonding strength, Charge transfer resistance, Hybrid silicon, Poly (epsiloncaprolactone), Simulated body fluids, Spherical nanoparticles, Surface coatings, Silicon alloys |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Mechanical Engineering |
| ID Code: | 72168 |
| Deposited By: | Fazli Masari |
| Deposited On: | 23 Nov 2017 06:19 |
| Last Modified: | 23 Nov 2017 06:19 |
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