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Title: Anatomy of flash sintering in yttria-stabilized zirconia solid-state electrolyte: High temporal resolution energy-dispersive X-ray diffraction using a 200 keV synchrotron probe
Authors: Şavklıyıldız, İ.
Degnah, A.
Biçer, H.
Salur, E.
Tsakalakos, T.
Akdoğan, E.K.
Keywords: Flash sintering
Synchrotron radiation
Unit cell expansion
Electric fields
Solid electrolytes
Solid oxide fuel cells (SOFC)
X ray diffraction
Yttria stabilized zirconia
Yttrium oxide
Energy-dispersive X-ray diffraction
Flash sintering
High temporal resolution
Solid-state electrolyte
Unit cell expansion
Unit-cell volume
Synchrotron radiation
Issue Date: 2023
Publisher: Springer Nature
Abstract: High-energy synchrotron X-ray diffraction enables ultra-rapid data collection to determine unit cell volume evolution of 8YSZ under thermal and electric field (30 V/mm). Such an approach provides unprecedented insight into the anatomy of 8YSZ’s flash sintering in the 797–810 °C interval. The densification due to flash sintering occurs in 40 s during which X-ray spectra were collected every 2 s. The densification of 8YSZ was accompanied by 0.55% anelastic peak shift on (220) reflection. Concomitantly, the applied thermal and electric field led to anelastic expansion of the cubic lattice parameter (+ 0.55%) and unit cell volume (+ 1.57%). Besides, an irreversible increase in the peak intensity (+ 22.6%), a decrease in peak width (− 18.3%), and integrated peak (− 13.6%) are determined. The observed anomalies are attributed to the response of oxygen vacancy generation and redistribution to the combined electric and thermal fields. Graphical abstract: [Figure not available: see fulltext.]. © 2023, The Author(s), under exclusive licence to The Materials Research Society.
ISSN: 0884-2914
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections

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