Journal
ADVANCED SCIENCE LETTERS
Volume 4, Issue 8-10, Pages 2860-2863Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/asl.2011.1741
Keywords
Hot-Extrusion; Mg-Zr-Ca Alloy; Microstructure; Mechanical Property; Biomaterial
Categories
Funding
- Guangdong Province, PR China [2008B010600003]
- Australia [AISRF-BF030031]
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This paper investigated the microstructural characterization and mechanical properties of Mg-Zr-Ca alloys prepared by hot-extrusion for potential use in biomedical applications. Mg-Zr-Ca alloys were fabricated by commercial pure Mg (99.9%), Ca (99.9%), and master Mg-33% Zr alloy (mass%). The microstructural characterization of the hot-extruded Mg-Zr-Ca alloys was examined by X-ray diffraction analysis and optical microscopy, and the mechanical properties were determined from tensile tests. The experimental results indicate that the hot-extruded Mg-Zr-Ca alloys with 1 mass% Ca are composed atone single a phase and those alloys with 2 mass% Ca consist of both Mg,Ca and a phase. The hot-extruded Mg-Zr-Ca alloys exhibit equiaxed granular microstructures and the hot-extrusion process can effectively increase both the tensile strength and ductility of Mg-Zr-Ca alloys. The hot-extruded Mg-1Zr-1Ca alloy (mass%) exhibits the highest strength and best ductility among all the alloys, and has much higher strength than the human bone, suggesting that it has a great potential to be a good candidate for biomedical application.
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