Influence of Calcium on the Structure and Mechanical Properties of Biodegradable Zinc Alloys

Abstract:

In this work, Zn-1.5Mg-0.5Ca alloy was studied. The alloy composition was chosen according to the results of our previous work that was focused on the research of biodegradable materials. The mechanical properties of such cast alloy are similar to the characteristics of human bones. Moreover, Zn-1.5Mg alloy itself satisfies biocompatibility requirements. The main goal of this work was to improve the mechanical properties of this alloy. A small addition of calcium affected both the alloy microstructure and mechanical properties. Light microscope and scanning electron microscope were used for the analysis of microstructure. After calcium addition, secondary phases were visible in observed micrographs; their composition was verified by XRD. Mechanical properties (Vickers hardness, compressive and tensile tests) were studied and compared with the Zn-1.5Mg alloy prepared in our previous work. Based on presented results, Zn-1.5Mg-0.5Ca alloy is intended for use in medicine as a suitable material for temporary implants.

• Periodical: Materials Science Forum (Volume 891)
• Pages: 400-403
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.891.400
• Online since: March 2017
• Authors: Iva Pospíšilová*, Věra Soukupová, Dalibor Vojtěch
• Keywords: Biodegradable Alloy, Calcium, Zinc

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