| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Moosmann, Julian
Helmholtz-Zentrum Hereon
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Unveiling thermo‐fluid dynamic phenomena in laser beam welding
- 2024Exploring spatial beam shaping in laser powder bed fusion:High-fidelity simulation and in-situ monitoringcitations
- 2024Improvement of corrosion resistance of PEO coated dissimilar Ti/Mg0.6Ca couplecitations
- 2024Improvement of corrosion resistance of PEO coated dissimilar Ti/Mg0.6Ca couplecitations
- 2024Towards an Understanding of the Challenges in Laser Beam Welding of Copper - Observation of the Laser-Matter Interaction Zone in Laser Beam Welding of Copper and Steel Using in Situ Synchrotron X-Ray Imagingcitations
- 2024Pull‐Out Testing of Electrochemically Etched NiTi Shape Memory Alloy Wires in Shape Memory Alloy Hybrid Composites
- 2024Pull‐Out Testing of Electrochemically Etched NiTi Shape Memory Alloy Wires in Shape Memory Alloy Hybrid Composites
- 2024Challenges in non-destructive X-ray CT testing of riveted joints in the automotive industrycitations
- 2023Interface failure analysis of embedded NiTi SMA wires using in situ high-resolution X-ray synchrotron tomographycitations
- 2023Analysis on the influence of vapor capillary aspect ratio on pore formation in laser beam welding of aluminumcitations
- 2023Towards an Understanding of the Challenges in Laser Beam Welding of Copper – Observation of the Laser-Matter Interaction Zone in Laser Beam Welding of Copper and Steel Using in Situ Synchrotron X-Ray Imagingcitations
- 2022Assessing the long-term in vivo degradation behavior of magnesium alloys - a high resolution synchrotron radiation micro computed tomography studycitations
- 2022Pore Formation and Melt Pool Analysis of Laser Welded Al-Cu Joints using Synchrotron Radiationcitations
- 2022Pore formation and melt pool analysis of laser welded Al-Cu joints using synchrotron radiationcitations
- 2021Assessing the microstructure and in vitro degradation behavior of Mg-xGd screw implants using µCTcitations
- 2021Assessing the microstructure and in vitro degradation behavior of Mg-xGd screw implants using µCTcitations
- 2021Multimodal ex vivo methods reveal that Gd-rich corrosion byproducts remain at the implant site of biodegradable Mg-Gd screwscitations
- 2019A load frame for in situ tomography at PETRA IIIcitations
- 2019A load frame for in situ tomography at PETRA IIIcitations
- 2018Visualization of Implant Failure by Synchrotron Tomographycitations
Places of action
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article
Multimodal ex vivo methods reveal that Gd-rich corrosion byproducts remain at the implant site of biodegradable Mg-Gd screws
Abstract
Extensive research is being conducted on magnesium (Mg) alloys for bone implant manufacturing, due to their biocompatibility, biodegradability and mechanical properties. Gadolinium (Gd) is among the most promising alloying elements for property control in Mg alloy implants; however, its toxicity is controversial. Investigating Gd behavior during implant corrosion is thus of utmost importance. In this study, we analyzed the degradation byproducts at the implant site of biodegradable Mg-5Gd and Mg-10Gd implants after 12 weeks healing time, using a combination of different imaging techniques: histology, energy-dispersive x-ray spectroscopy (EDX), x-ray microcomputed tomography (µCT) and neutron µCT. The main finding has been that, at the healing time in exam, the corrosion appears to have involved only the Mg component, which has been substituted by calcium and phosphorus, while the Gd remains localized at the implant site. This was observed in 2D by means of EDX maps and extended to 3D with a novel application of neutron tomography. X-ray fluorescence analysis of the main excretory organs also did not reveal any measurable accumulation of Gd, further reinforcing the conclusion that very limited or no removal at all of Gd-alloy happened during degradation. Statement of significance: Gadolinium is among the most promising alloying elements for property control in biodegradable magnesium alloy implants, but its toxicity is controversial and its behavior during corrosion needs to be investigated. We combine 2D energy dispersive x-ray spectroscopy and 3D neutron and x-ray tomography to image the degradation of magnesium-gadolinium implants after 12 weeks of healing time. We find that, at the time in exam, the corrosion has involved only the magnesium component, while the gadolinium remains localized at the implant site. X-ray fluorescence analysis of the main excretory organs also does not reveal any measurable accumulation of Gd, further reinforcing the conclusion that very limited or no removal at all of Gd-alloy has ...