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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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Lu, Wenjun
Engineering and Physical Sciences Research Council
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocationscitations
- 2024A Peridynamic Approach to Simulate Sea Ice Fracture with a Focus on its time-dependent material behaviour
- 2021Nanoscale characterisation of hydrides and secondary phase particles in Zircaloy-4citations
- 2021Nanocrystalline equiatomic CoCrFeNi alloy thin films: Are they single phase fcc?citations
- 2021Beyond Solid Solution High-Entropy Alloys: Tailoring Magnetic Properties via Spinodal Decompositioncitations
- 2021Nanocrystalline equiatomic CoCrFeNi alloy thin filmscitations
- 2020Interplay of Chemistry and Faceting at Grain Boundaries in a Model Al Alloycitations
- 2019Ultrastrong medium-entropy single-phase alloys designed via severe lattice distortioncitations
- 2019Ti and its alloys as examples of cryogenic focused ion beam milling of environmentally-sensitive materialscitations
Places of action
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document
Nanoscale characterisation of hydrides and secondary phase particles in Zircaloy-4
Abstract
The interaction of hydrogen and metals continues to be industrially relevant and is a critical part of creating and supporting a safety case for nuclear reactor operation. In the present work, we explore hydrogen storage and hydride formation in a zirconium alloy. We characterise the structure and interfaces of fine scale hydrides using scanning transmission electron microscopy (STEM) including energy dispersive spectroscopy (EDS/EDX), electron energy loss spectroscopy (EELS), and high-resolution STEM. Chemical characterisation is supported further with atom probe tomography (APT). Samples were prepared with cryo-focussed ion beam machining (cryo-FIB) and contain hydrides in α-Zr matrix and hydrides associated with one FeCrZr secondary phase particle (SPP). Major findings include characterisation of different interface planes based upon the size of the hydrides and chemical redistribution of solute ahead of the hydride-metal interface. We also find significant (up to 6 at%) hydrogen retained in solution within the zirconium matrix and show a hydride with only 17 at% hydrogen, which is well below that of a ξ-phase stoichiometry suggesting it is an embryonic hydride. These findings help us understand the distribution of hydrogen and the nanoscale morphology of hydrides, which may influence the lifetime of zirconium-based nuclear fuel cladding.