Event Abstract Back to Event Effects of Sn addition on bio-degradation behavior of Mg-1Zn-1Zr-xSn (x = 1, 3, 5) alloy prepared by powder in tube rolling (PTR) Ahmad Zakiyuddin1 and Kwangmin Lee1 1 Chonnam National University, Department of Materials Science and Engineering, Korea Magnesium (Mg) alloys have unique biodegradable property with low density, non-toxicity, and mechanical properties that are similar to human bones attracting many biomedical applications from bone to cardiovascular implants. The combination of mechanical strength and degradability of Mg makes it suitable for bone fixation. Rapid degradation rate of Mg, however, is very challenging and prevents the widespread use of the implants. Trace amounts of Zn contribute to Mg strength by a process of solid solution strengthening, and then refined effectively by Zr. The addition of Sn to Mg alloys could enhance mechanical and corrosion properties by forming Mg2Sn phase. The difference in melting points of the elements and easy oxidation make low-alloyed Mg alloys hard to control alloying compositions during casting process. The objectives of the current research were to study the effect of Sn addition on mechanical and corrosion properties along with its effect on hydrogen evolution rate of Mg-1Zn-1Zr-xSn (x = 1, 3, 5) alloys prepared by Powder in Tube Rolling (PTR) method. In this research, quaternary Mg-1Zn-1Zr-xSn (x = 1, 3, 5) alloys were manufactured by PTR method. Steel tube was used in order to hold the powder during the rolling process and to further prevent the oxidation of Mg during sintering process. The PTR treated Mg alloys reached 98.3% of theoretical density. There were some pores still observed on the surface of the PTR specimen even with high density. The hardness value increased as the amount of Sn addition increased. SEM and XRD observation revealed that there are two main intermetallic phases emerging on the surface of the alloys, which are Mg2Sn and Zn2Zr3. The intensity of Mg2Sn increased as the amount of Sn increased. On the other hand, Zn2Zr3 reached its maximum intensity when the addition of Sn was 3 wt.%. The observed Mg2Sn intermetallic phase was distributed along the grain boundaries, while Zn2Zr3 particles diffused inside Mg matrix. The degradation behavior of the alloys was evaluated by potentiodynamic polarization test (PDP) in SBF solution at temperature of 37±1oC. The addition of Sn to 3 wt.% simply shifted the corrosion potential towards positive zone and lowered the corrosion current density. When more Sn was added to alloys, the corrosion potential were in negative zone and corrosion current were increased. The lowest hydrogen gas evolution rate was observed on 3 wt.% of Sn, while the highest was observed on 5 wt.% of Sn. Mg-1Zn-1Zr-3Sn alloy showed optimum mechanical properties with the lowest hydrogen evolution rate during evaluation. Tailoring will be necessary to refine the grain, remove the surface porosity and further suppress the hydrogen evolution rate of this alloy. Keywords: in vitro, Biocompatibility, microstructure, Biodegradable metal Conference: 10th World Biomaterials Congress, Montréal, Canada, 17 May - 22 May, 2016. Presentation Type: Poster Topic: Combinatorial approaches to biomaterial design Citation: Zakiyuddin A and Lee K (2016). Effects of Sn addition on bio-degradation behavior of Mg-1Zn-1Zr-xSn (x = 1, 3, 5) alloy prepared by powder in tube rolling (PTR). Front. Bioeng. Biotechnol. Conference Abstract: 10th World Biomaterials Congress. doi: 10.3389/conf.FBIOE.2016.01.00390 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 27 Mar 2016; Published Online: 30 Mar 2016. Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Ahmad Zakiyuddin Kwangmin Lee Google Ahmad Zakiyuddin Kwangmin Lee Google Scholar Ahmad Zakiyuddin Kwangmin Lee PubMed Ahmad Zakiyuddin Kwangmin Lee Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.