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Home List of Titles Microstructures, mechanical properties and in vitro corrosion behaviour of biodegradable Mg-Zr-Ca alloys
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/236598
- Microstructures, mechanical properties and in vitro corrosion behaviour of biodegradable Mg-Zr-Ca alloys
- Zhou, Ying-Long; Li, Yuncang; Luo, Dong-Mei; Wen, Cuie; Hodgson, Peter
- The microstructures, mechanical properties, corrosion behaviour and biocompatibility of the Mg-Zr-Ca alloys have been investigated for potential use in orthopaedic applications. The microstructures of the alloys were examined using X-ray diffraction analysis, optical microscopy and scanning electron microscopy. The mechanical properties of Mg-Zr-Ca alloys were determined from compressive tests. The corrosion behaviour has been investigated using an immersion test and electrochemical measurement. The biocompatibility was evaluated by cell growth factor using osteoblast-like SaOS2 cell. The experimental results indicate that the hot-rolled Mg-Zr-Ca alloys exhibit much finer microstructures than the as-cast Mg-Zr-Ca alloys which show coarse microstructures. The compressive strength of the hot-rolled alloys is much higher than that of the as-cast alloys and the human bone, which would offer appropriate mechanical properties for orthopaedic applications. The corrosion resistance of the alloys can be enhanced significantly by hot-rolling process. Hot-rolled Mg-0.5Zr-1Ca alloy (wt %) exhibits the lowest corrosion rate among all alloys studied in this paper. The hot-rolled Mg-0.5Zr-1Ca and Mg-1Zr-1Ca alloys exhibit better biocompatibility than other studied alloys and possess advanced mechanical properties, corrosion resistance and biocompatibility, suggesting that they have a great potential to be good candidates for orthopaedic applications.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences
- Journal of Materials Science, Vol. 48, no. 4 (Feb 2013), pp. 1632-1639
- Publication year
- Biodegradable implants; Calcium; Corrosion behaviour; In vitro; Magnesium; Mechanical properties; Mg-Zr-Ca; Microstructures; Zinc
- Publisher URL
- Copyright © Springer Science+Business Media New York 2012. The accepted manuscript will be reproduced 12 months after publication (Feb 2014) in accordance with the copyright policy of the publisher. The definitive version is available at www.springer.com.
- Additional information
- The authors acknowledge support from the Key Scientific and Technological Projects of Guangdong Province, P. R. China (2008B010600003) and AISRF-BF030031, Australia.
- Peer reviewed