COMPARATIVE STUDY OF MAGNESIUM AND ZINC BASED BIODEGRADABLE MATERIALS

1 KUBÁSEK Jiří
Co-authors:
2 ČAPEK Jaroslav 1 DVORSKÝ Drahomír 1 VOJTĚCH Dalibor
Institutions:
1 University of Chemistry and Technology, Prague, Czech Republic, EU, kubasekj@vscht.cz
2 Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic, EU, capekj@fzu.cz
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1381-1387
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
26 views / 8 downloads
Abstract

Magnesium and its alloys are considered for specific applications in medicine such as fixation devices, screws and stents. However, release of hydrogen gas, pH increase and premature failure of the mechanical integrity of implant material are considered as the main limitations. Zinc-based alloys offer an interesting alternative choice for similar kind of applications, however, some limitations are known. First of all, the human body is able to accept significantly lower daily doses of zinc compared to magnesium. Zinc is also quite heavy metal with density and young modulus highly different from that of bones. In summary, both kinds of alloys intended for applications in medicine behave very differently. In present work Mg-4Y-3RE magnesium-based alloy and Zn-1Mg-0.5Ca zinc-based alloy were selected as representative materials and the most relevant properties of both groups of alloys are specified. Obtained results confirmed that zinc-based alloys can compete magnesium-based alloys in the case of strength and corrosion rate. Unfortunately, plasticity and also biocompatibility of studied Zn-1Mg-0.5Ca were significantly deteriorated compared to the Mg-4Y-3RE alloy.

Keywords: Magnesium, zinc, biodegradable materials, mechanical properties, corrosion
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