PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 23 (2019) 21–26

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. Zinc and zinc alloys exhibit suitable corrosion pr perties f r biodegradable implants. Insuffic ent mechanical propertie (for some applications) or low b ocompatible Z 2+ conc trations can b mod fied by the all ying by ssential elem nts like magn sium, calcium or strontium. Th alloyi g el me ts also enha ce the biocompatibility of zinc ue to a decrease of Zn 2+ release which could be toxic in conc ntration xceeding 100 µM. In this study, the microstruct re and hardness of a potentially biodegrad ble alloy ZnMg0.8Ca0.2 wer obs ved in relation to different cooling rates. It was found that zi c dendrites, Mg 2 Zn 11 (MgZn 2 ) and CaZn 13 phases occur in the material structure. Th micro- ar ness measurements reveal d constant hardnes of the particular phases; owever, the macro-harness slightly decreased with the decreasing co ling rate due t changes in pha e sizes a d distribution. The obtained information allows to optimize the preparation process in order to reach optimal properties of the ZnMg0.8Ca0.2 alloys. © 201 9 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture Microstructure and mechanical properties of the potentially biodegradable ternary system Zn-Mg0.8-Ca0.2 Jan Pinc a,b, * , Jaroslav Čapek a , Jiří Kubásek b , Petr Veřtát a , Klára Hosová b a FZU - Institute of Physics, Czech Academy of Sciences (CAS), Na Slovance 1999/2, 182 21 Prague 8, Czech Republic b University of Chemistry and Technology, Prague, Department of Metals and Corrosion Engineering, Technicka 5, Prague, 166 28, Czech Republic Zinc and zinc alloys exhibit suitable corrosion properties for biodegradable implants. Insufficient mechanical properties (for some applications) or low biocompatible Zn 2+ concentrations can be modified by the alloying by essential elements like magnesium, calcium or strontium. The alloying elements also enhance the biocompatibility of zinc due to a decrease of Zn 2+ release which could be toxic in a concentration exceeding 100 µM. In this study, the microstructure and hardness of a potentially biodegradable alloy ZnMg0.8Ca0.2 were observed in relation to different cooling rates. It was found that zinc dendrites, Mg 2 Zn 11 (MgZn 2 ) and CaZn 13 phases occur in the material structure. The micro-hardness measurements revealed constant hardness of the particular phases; however, the macro-harness slightly decreased with the decreasing cooling rate due to changes in phase sizes and distribution. The obtained information allows to optimize the preparation process in order to reach optimal properties of the ZnMg0.8Ca0.2 alloys. 9th International Conference on Materials Structure and Micromechanics of Fracture Microstructure and mechanical properties of the potentially biodegradable ternary system Zn-Mg0.8-Ca0.2 Jan Pinc a,b, * , Jaroslav Čapek a , Jiří Kubásek b , Petr Veřtát a , Klára Hosová b a FZU - Institute of Physics, Czech Academy of Sci ces (CAS), Na Sl vance 1999/2, 182 21 Prague 8, Czech R public b University of Chemistry and Technology, Prague, Department of Metals and Corrosion Engineering, Technicka 5, Prague, 166 28, Czech Republic Abstract Abstract

Keywords: Biodegradable material; Zinc; Microstructure; Hardness; Ternary system Keywords: Biodegradable material; Zinc; Microstructure; Hardness; Ternary system

* Corresponding author. Tel.: +420266052631. E-mail address: pinc@fzu.cz * Correspon ing author. Tel : +420266052631. E-mail address: pinc@fzu.cz

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.057