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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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Meden, Anton
University of Ljubljana
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2023Periodic anti-phase boundaries and crystal superstructures in PtCu$_3$ nanoparticles as fuel cell electrocatalystscitations
- 2023Formation and Evolution of the Hydrotalcite-Like Phase During Ageing of Dolomite-Cement Mortars under Various Conditionscitations
- 2022Zero-Magnetostriction Magnetically Soft High-Entropy Alloys in the AlCoFeNiCux (x = 0.6–3.0) System for Supersilent Applicationscitations
- 2022Crystal structure, microstructure and electronic properties of a newly discovered ternary phase in the Al-Cr-Sc systemcitations
- 2022Structure and superconductivity of tin-containing HfTiZrSnM (M = Cu, Fe, Nb, Ni) medium-entropy and high-entropy alloyscitations
- 2022The effect of scandium on the structure, microstructure and superconductivity of equimolar Sc-Hf-Nb-Ta-Ti-Zr refractory high-entropy alloyscitations
- 2022Electronic transport properties of the Al0.5TiZrPdCuNi alloy in the high-entropy alloy and metallic glass formscitations
- 2021Nanostructure and local polymorphism in “ideal-like” rare-earths-based high-entropy alloyscitations
- 2021Crystal Structure, Microstructure and Electronic Properties of a Newly Discovered Ternary Phase in the Al-Cr-Sc Systemcitations
- 2021Structure and Superconductivity of Tin-Containing HfTiZrSnM (M = Cu, Fe, Nb, Ni) Medium-Entropy and High-Entropy Alloyscitations
- 2014Synthesis and Magnetic Properties of Hematite Particles in a “Nanomedusa” Morphologycitations
- 2011Carboaluminate Phases Formation During the Hydration of Calcite-Containing Portland Cementcitations
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article
Crystal Structure, Microstructure and Electronic Properties of a Newly Discovered Ternary Phase in the Al-Cr-Sc System
Abstract
International audience ; This study focused on the crystal and electronic structures of a newly discovered phase in the Al-Cr-Sc system. The latter two species do not mix in a binary alloy, but can be alloyed with aluminium in the vicinity of the Al2−xCrxSc composition, where 0.3 < x < 0.5. After preparation of the pure constituents via arc melting, high-temperature annealing at 990 ◦C for 240 h was required to achieve full mixing of the elements. A detailed characterisation of the crystal structure, alloy microstructure and stability was obtained using single-crystal X-ray diffraction (SCXRD) and powder X-ray diffraction (PXRD), in addition to transmission electron microscopy (TEM), especially in high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) mode, scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDXS) and differential scanning calorimetry (DSC) measurements. The crystal structure was refined to a hexagonal unit cell of the MgZn2 type, space group no. 194, P63/mmc, which belongs to the Laves phases family. Special attention was paid to the occupancy of the crystallographic sites that were filled by both Cr and Al atoms. First-principles calculations based on the density functional theory (DFT) were performed toinvestigate the electronic structure of this ternary phase. The total density of states (DOS) exhibited a pronounced sp character, where a shallow pseudo-gap was visible 0.5 eV below the Fermi energy that brought a small but definite contribution to the thermodynamic stability of the compound.