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https://hdl.handle.net/20.500.13091/3050
Title: | Multicycle flash sintering of cubic Y2O3-stabilized ZrO2: An in situ energy dispersive synchrotron x-ray diffraction study with high temporal resolution | Authors: | Biçer, Hülya Degnah, Ahmed Salur, Emin Şavklıyıldız, İlyas Tsakalakos, Thomas Akdoğan, E.Koray |
Keywords: | Diffusion Energy dispersive x-ray diffraction Flash sintering Lattice expansion Synchrotron diffraction Full width at half maximum Sintering Solid electrolytes Synchrotron radiation Synchrotrons Thermal expansion Yttria stabilized zirconia Yttrium oxide Applied field Energy dispersive Energy dispersive x-ray diffractions Energy-dispersive X-ray diffraction Flash sintering Full widths at half maximums Lattice expansion Multi cycle Synchrotron diffraction Unit-cell volume X ray diffraction |
Publisher: | Elsevier Ltd | Abstract: | The current induced unit cell volume changes, (111) Bragg peak full width at half maximum (FWHM) and its integrated intensity in 8 % Y2O3 stabilized ZrO2 (8 %YSZ) solid state electrolyte was monitored during a triple-flash sintering experiment by in situ energy dispersive x-ray diffraction using a polychromatic synchrotron probe (max, photon energy 200 keV) with 2 second temporal resolution. The first spontaneous singularity in the unit cell volume (+0.54 %) was observed at 899 °C under 15 V/mm applied field intensity, which was associated with 13 mA/mm2 current draw and an increase in density to 97 %. Following anelastic relaxation of the unit cell volume under open circuit conditions, the same applied field was applied twice in a row which resulted in additional induced singularities at 925 °C (+0.48 %) and 944 °C (+0.42 %). A floating baseline, which was above the thermal expansion baseline, was observed from 833 to 969 °C and was attributed to Joule heating. The singularity at 899 °C is associated with a sharp change in (111) FWHM and a 34 % decrease in integrated peak area that was attributed to changes in the distribution of oxygen vacancies and the changes in their concentration as induced by the applied field in the spontaneous transient stage of flash sintering. © 2022 Elsevier Ltd | URI: | https://doi.org/10.1016/j.mtcomm.2022.104272 https://hdl.handle.net/20.500.13091/3050 |
ISSN: | 2352-4928 |
Appears in Collections: | Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections |
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1-s2.0-S2352492822011163-main.pdf Until 2030-01-01 | 2.43 MB | Adobe PDF | View/Open Request a copy |
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