Muhammad, Qaisar Khushi ; Valderrama, Marcela ; Yue, Mengkun ; Opitz, Alexander Karl ; Taibl, Stefanie ; Siebenhofer, Matthäus ; Bruder, Enrico ; Fleig, Jürgen ; Fang, Xufei ; Frömling, Till (2023)
Dislocation-tuned electrical conductivity in solid electrolytes (9YSZ): a micro-mechanical approach.
In: Journal of the American Ceramic Society, 106 (11)
doi: 10.1111/jace.19291
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Tailoring the electrical conductivity of functional ceramics by introducing dislocations is a comparatively recent research focus, and its merits were demonstrated through mechanical means. Especially bulk deformation at high temperatures is suggested to be a promising method to introduce a high dislocation density. So far, however, controlling dislocation generation and their annihilation remains difficult. Although deforming ceramics generate dislocations on multiple length scales, dislocation annihilation at the same time appears to be the bottleneck to use the full potential of dislocationstailoring the electrical conductivity. Here, we demonstrate the control over these aspects using a micromechanical approach on yttria-stabilized zirconia-YSZ. Targeted indentation well below the dislocation annihilation temperature resulted in extremely dense dislocation networks, visualized by chemical etching and electron channeling contrast imaging. Microcontact-impedance measurements helped evaluate the electrical response of operating individual slip systems. A significant conductivity enhancement is revealed in dislocationrich regions compared to pristine ones in fully stabilized YSZ. This enhancement is mainly attributed to oxygen ionic conductivity. Thus, the possibility of increasing the conductivity is illustrated and provides a prospect to transfer the merits of dislocation-tuned electrical conductivity to solid oxygen electrolytes.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Muhammad, Qaisar Khushi ; Valderrama, Marcela ; Yue, Mengkun ; Opitz, Alexander Karl ; Taibl, Stefanie ; Siebenhofer, Matthäus ; Bruder, Enrico ; Fleig, Jürgen ; Fang, Xufei ; Frömling, Till |
| Art des Eintrags: | Bibliographie |
| Titel: | Dislocation-tuned electrical conductivity in solid electrolytes (9YSZ): a micro-mechanical approach |
| Sprache: | Englisch |
| Publikationsjahr: | 6 September 2023 |
| Ort: | Oxford |
| Verlag: | Wiley-Blackwell |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 106 |
| (Heft-)Nummer: | 11 |
| DOI: | 10.1111/jace.19291 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Tailoring the electrical conductivity of functional ceramics by introducing dislocations is a comparatively recent research focus, and its merits were demonstrated through mechanical means. Especially bulk deformation at high temperatures is suggested to be a promising method to introduce a high dislocation density. So far, however, controlling dislocation generation and their annihilation remains difficult. Although deforming ceramics generate dislocations on multiple length scales, dislocation annihilation at the same time appears to be the bottleneck to use the full potential of dislocationstailoring the electrical conductivity. Here, we demonstrate the control over these aspects using a micromechanical approach on yttria-stabilized zirconia-YSZ. Targeted indentation well below the dislocation annihilation temperature resulted in extremely dense dislocation networks, visualized by chemical etching and electron channeling contrast imaging. Microcontact-impedance measurements helped evaluate the electrical response of operating individual slip systems. A significant conductivity enhancement is revealed in dislocationrich regions compared to pristine ones in fully stabilized YSZ. This enhancement is mainly attributed to oxygen ionic conductivity. Thus, the possibility of increasing the conductivity is illustrated and provides a prospect to transfer the merits of dislocation-tuned electrical conductivity to solid oxygen electrolytes. |
| Freie Schlagworte: | dislocations, mechanical deformation, nanoindentation, oxygen–ionic conductivity, SOEC, SOFC, solid electrolytes, yttria-stabilized zirconia |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physikalische Metallkunde |
| Hinterlegungsdatum: | 07 Sep 2023 05:21 |
| Letzte Änderung: | 19 Jul 2024 10:43 |
| PPN: | 511338732 |
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| Suche nach Titel in: | TUfind oder in Google |
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Dislocation‐tuned electrical conductivity in solid electrolytes (9YSZ): A micro‐mechanical approach. (deposited 07 Nov 2023 12:41)
- Dislocation-tuned electrical conductivity in solid electrolytes (9YSZ): a micro-mechanical approach. (deposited 07 Sep 2023 05:21) [Gegenwärtig angezeigt]
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