| 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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Correia, J. B.
National Laboratory of Energy and Geology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Simulation, Structural, Thermal and Mechanical Properties of the FeTiTaVW High Entropy Alloycitations
- 2023Hybrid molecular dynamic Monte Carlo simulation and experimental production of a multi-component Cu–Fe–Ni–Mo–W alloycitations
- 2023Behavior of Cu-Y2O3 and CuCrZr-Y2O3 composites before and after irradiationcitations
- 2022Damage threshold of CuCrFeTiV high entropy alloys for nuclear fusion reactors
- 2019New WC-Cu composites for the divertor in fusion reactorscitations
- 2018Mechanical activation of pre-alloyed NiTi2 and elemental Ni for the synthesis of NiTi alloyscitations
- 2017Helium and deuterium irradiation effects in W-Ta composites produced by pulse plasma compactioncitations
- 2015The effects of tantalum addition on the microtexture and mechanical behaviour of tungsten for ITER applicationscitations
- 2014Multiscale Copper-uDiamond Nanostructured Composites
- 2014Elemental interdiffusion in W-Ta composites developed for fusion applications
- 2014Synergistic helium and deuterium blistering in tungsten–tantalum compositescitations
- 2013Nickel–carbon nanocomposites: Synthesis, structural changes and strengthening mechanismscitations
- 2013Recent progress in research on tungsten materials for nuclear fusion applications in Europecitations
- 2013Recent progress in research on tungsten materials for nuclear fusion applications in Europecitations
- 2013Multiscale copper-μdiamond nanostructured composites
- 2013Tungsten–nanodiamond composite powders produced by ball millingcitations
- 2011Microstructural characterization of the ODS Eurofer 97 EU-batch
- 2011Production of Cu/Diamond composites for first-wall heat sinks
- 2010Novel approach to plasma facing materials in nuclear fusion reactors
Places of action
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article
Helium and deuterium irradiation effects in W-Ta composites produced by pulse plasma compaction
Abstract
<p>Tungsten-tantalum composites have been envisaged for first-wall components of nuclear fusion reactors; however, changes in their microstructure are expected from severe irradiation with helium and hydrogenic plasma species. In this study, composites were produced from ball milled W powder mixed with 10 at.% Ta fibers through consolidation by pulse plasma compaction. Implantation was carried out at room temperature with He<sup>+</sup> (30 keV) or D<sup>+</sup> (15 keV) or sequentially with He<sup>+</sup> and D<sup>+</sup> using ion beams with fluences of 5 × 10<sup>21</sup> at/m<sup>2</sup>. Microstructural changes and deuterium retention in the implanted composites were investigated by scanning electron microscopy, coupled with focused ion beam and energy dispersive X-ray spectroscopy, transmission electron microscopy, X-ray diffraction, Rutherford backscattering spectrometry and nuclear reaction analysis. The composite materials consisted of Ta fibers dispersed in a nanostructured W matrix, with Ta<sub>2</sub>O<sub>5</sub> layers at the interfacial regions. The Ta and Ta<sub>2</sub>O<sub>5</sub> surfaces exhibited blisters after He<sup>+</sup> implantation and subsequent D<sup>+</sup> implantation worsened the blistering behavior of Ta<sub>2</sub>O<sub>5</sub>. Swelling was also pronounced in Ta<sub>2</sub>O<sub>5</sub> where large blisters exhibited an internal nanometer-sized fuzz structure. Transmission electron microscopy revealed an extensive presence of dislocations in the metallic phases after the sequential implantation, while a relatively low density of defects was detected in Ta<sub>2</sub>O<sub>5</sub>. This behavior may be partially justified by a shielding effect from the blisters and fuzz structure developed progressively during implantation. The tungsten peaks in the X-ray diffractograms were markedly shifted after He<sup>+</sup> implantation, and even more so after the sequential implantation, which is in agreement with the increased D retention inferred from nuclear reaction analysis.</p>