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EnglishSingle-phase high entropy fluorite (Ce0.2Zr0.2Y0.2Gd0.2La0.2O2 δ) samples were synthesized by co-precipitation and consolidated by ultrafast high-temperature sintering (UHS) in less than 2 min. The chemical homogeneity of the sintered materials was confirmed by X-Ray Diffraction (XRD), Energy Dispersive X-ray Spectroscopy (EDXS), high-resolution EDXS using Transmission Electron Microscopy (TEM), and Raman spectroscopy. Compared to conventional sintering, UHS of high entropy ceramics was a hundred times faster and it resulted in highly dense microstructures (relative density > 93%) with nanometric grains. Ce0.2Zr0.2Y0.2Gd0.2La0.2O2 δ densified under an UHS current of 20–25 A. An optimized step-wise UHS schedule was proposed to obtain dense, single-phase pellets with a reduced amount of defects. The extreme heating rates were found beneficial to limit grain coarsening and to obtain a single phase.
Ultra-fast high-temperature sintering ({UHS}) of Ce0.2Zr0.2Y0.2Gd0.2La0.2O2-$\updelta$ fluorite-structured entropy-stabilized oxide (F-{ESO}) / Spiridigliozzi, Luca; Dell( extquotesingle)Agli, Gianfranco; Esposito, Serena; Rivolo, Paola; Grasso, Salvatore; Sglavo, Vincenzo M.; Biesuz, Mattia. - In: SCRIPTA MATERIALIA. - ISSN 1359-6462. - ELETTRONICO. - 214:(2022), p. 114655. [10.1016/j.scriptamat.2022.114655]
| Titolo: | Ultra-fast high-temperature sintering ({UHS}) of Ce0.2Zr0.2Y0.2Gd0.2La0.2O2-$\updelta$ fluorite-structured entropy-stabilized oxide (F-{ESO}) | |
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| Data di pubblicazione: | 2022 | |
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| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.scriptamat.2022.114655 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Scripta Materialia.pdf | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia | |
| Revised_Manuscript_Scripta_def_02 (1).pdf | 2. Post-print / Author's Accepted Manuscript |  | Embargo: 08/03/2024 Richiedi una copia |
http://hdl.handle.net/11583/2957998
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