| 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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Vinci, Tommaso
École Polytechnique
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Shock-driven amorphization and melt in Fe$_2$O$_3$
- 2023Transonic dislocation propagation in diamond.citations
- 2023Zr-based metallic glasses Hugoniot under laser shock compression and spall strength evolution with the strain rate >10$^7$ s$^{-1}$)citations
- 2023Zr-based metallic glasses Hugoniot under laser shock compression and spall strength evolution with the strain rate (> 107 s-1)citations
- 2023Transonic dislocation propagation in diamondcitations
- 2022Zr-based bulk metallic glasses equation of state under laser shock compression and spall strength
- 2022Zr-based bulk metallic glasses equation of state under laser shock compression and spall strengths.
- 2021Spin State of Iron in Dynamically Compressed Olivine Melt
- 2021Metallization of Shock-Compressed Liquid Ammoniacitations
- 2021X-ray powder diffraction in reflection geometry on multi-beam kJ-type laser facilitiescitations
- 2020Equation of state and electrical conductivity of warm dense ammonia at the conditions of large icy planets' interiors.
- 2020In situ X-ray diffraction of silicate liquids and glasses under dynamic and static compression to megabar pressurescitations
- 2020Direct Observation of Shock‐Induced Disordering of Enstatite Below the Melting Temperaturecitations
- 2020Ultrafast X-ray Diffraction Measurements Of shock-Compressed Fe and Fe-Si Alloys
- 2017Shock response to solid germanium
- 2016Direct structural investigation of shock compressed silicates from x-ray diffraction
- 2016Kinetics of the iron α -∊ phase transition at high-strain rates: Experiment and modelcitations
- 2014Melting of iron close to Earth's inner core boundary conditions detected by XANES spectroscopy in laser shock experiment
- 2010Large scale simulations of quasi-isentropic compression in Fe and Al
- 2009Microstructural investigation of melting in laser-shocked recovered iron foils
- 2006Laser-driven shock waves for the study of extreme matter statescitations
Places of action
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document
Ultrafast X-ray Diffraction Measurements Of shock-Compressed Fe and Fe-Si Alloys
Abstract
The extreme pressures achievable with dynamic compression holds great promise for studying planetary interiors. Phase stability of Fe-Si alloys, which are complex to address, is particularly relevant to understanding telluric planetary cores due to the widely varying properties produced by small changes in Si concentration. Here we report the study of phase stability of pure iron and Fe-Si alloys by x-ray diffraction measurements carried out on shocked samples using an x-ray free electron laser (XFEL). We have used the extremely bright, 10 fs x-ray pulse generated at the Spring-8 Angstrom Compact Free Electron Laser (SACLA) facility in Japan to determine the crystal structure during the initial shock in Fe, Fe-Si8.5wt%, and Fe-Si16wt% as well as on release into sapphire in Fe-Si16wt%. Our setup combined with the brilliance of the XFEL allows us to observe the rapid onset of high-pressure solid-solid phase transformation in Fe and Fe-Si8.5wt%; we observe no such evidence in Fe-Si16wt% up to 110 GPa on the nanosecond timescale. Additional Density Functional Theory calculations have been performed to provide structural predictions calculations and explore the phase stability of Fe-Si alloys. Taken together our experiments and calculations support recent dynamic compression measurements and shed light on conflicting static compression results. Our work highlights the need to properly consider the differing intrinsic timescales of the static and dynamic experiments when comparing results, and the complementarity of the techniques in assessing phase diagram and transition mechanisms....