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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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Martinez, E.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2023A quinary WTaCrVHf nanocrystalline refractory high-entropy alloy withholding extreme irradiation environmentscitations
- 2021Helium implantation damage resistance in nanocrystalline W-Ta-V-Cr high entropy alloyscitations
- 2020Radiation-induced segregation in W-Re: from kinetic Monte Carlo simulations to atom probe tomography experimentscitations
- 2018Magnetic properties and field-driven dynamics of chiral domain walls in epitaxial Pt/Co/AuxPt1-x trilayers
- 2018Role of the Sink Density in Non-Equilibrium Chemical Redistribution in Binary Alloyscitations
- 2018Role of the Sink Density in Non-Equilibrium Chemical Redistribution in Binary Alloyscitations
- 2017Progress update on lower length scale research and development on U3Si2 fuel and FeCrAl cladding
- 2017Effect of Li on the deformation mechanisms of nanocrystalline hexagonal close packed magnesiumcitations
- 2014Atomistic simulations of the decomposition kinetics in Fe-Cr alloys: Influence of magnetismcitations
- 2007Nanoembossed polymer substrates for biomedical surface interaction studies.citations
- 2006Influence of electron-beam and ultraviolet treatments on low-k porous dielectricscitations
- 2006Transparent micro- and nanopatterned poly(lactic acid) for biomedical applicationscitations
Places of action
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article
Helium implantation damage resistance in nanocrystalline W-Ta-V-Cr high entropy alloys
Abstract
<p>Nanocrystalline W-Ta-Cr-V high entropy alloys have shown promising properties as nuclear fusion materials with enhanced radiation resistance to heavy ion irradiation and negligible radiation hardening. In this work, we investigate the performance of the alloy under low energy helium (He) implantation up to a fluence of 1.25 × 10<sup>17</sup> cm<sup>−2</sup> at 1223 K. We observe a uniform high density of very small (~2–3 nm) bubbles grown at a slow rate along with enhanced He bubble damage resistance, further marked by no preferential bubble formation on the grain boundaries, even at much higher fluences compared to previously implanted tungsten grades. First principle calculations of He formation and migration energies in this alloy indicate deep energetic wells on the potential landscape and low diffusivity of He compared to pure W. The results imply higher overall (considering both grain matrices and grain boundaries) implantation resistance due to slow He diffusion and accumulation, and confirm the enhanced vacancy-self interstitial recombination argument in these alloys.</p>