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
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- 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 is reproduced 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.
- Full text
- Peer reviewed