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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: Savkliyildiz, Ilyas
Degnah, Ahmed
Biçer, Hülya
Salur, Emin
Tsakalakos, Thomas
Akdoğan, Enver Koray
Keywords: Unit cell expansion
Synchrotron radiation
Flash sintering
Thermal Runaway
Assisted Densification
Lattice Expansion
Issue Date: 2023
Publisher: Springer Heidelberg
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 & DEG;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.
ISSN: 0884-2914
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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