Preuß, Oliver ; Bruder, Enrico ; Lu, Wenjun ; Zhuo, Fangping ; Minnert, Christian ; Zhang, Jiawen ; Rödel, Jürgen ; Fang, Xufei (2023)
Dislocation toughening in single-crystal KNbO3.
In: Journal of the American Ceramic Society, 106 (7)
doi: 10.1111/jace.19088
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
The growing research interest in dislocation-tuned functionality in ceramics is evident, with the most recent proofs-of-concept for enhanced ferroelectric properties, electrical conductivity, and superconductivity via dislocations. In this work, we focus on dislocation-tuned mechanical properties and demonstrate that, by engineering high dislocation densities (up to 1014 m−2) into KNbO3 at room temperature, the fracture toughness can be improved by a factor of 2.8. The microstructures, including dislocations and domain walls, are examined by optical microscopy, electron channeling contrast imaging, piezo-response force microscopy, and transmission electron microscopy methods to shed light on the toughening mechanisms. In addition, high-temperature (above the Curie temperature of KNbO3) indentation tests were performed to exclude the influence of ferroelastic toughening, such that the origin of the toughening effect is pinpointed to be dislocations.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Preuß, Oliver ; Bruder, Enrico ; Lu, Wenjun ; Zhuo, Fangping ; Minnert, Christian ; Zhang, Jiawen ; Rödel, Jürgen ; Fang, Xufei |
| Art des Eintrags: | Bibliographie |
| Titel: | Dislocation toughening in single-crystal KNbO3 |
| Sprache: | Englisch |
| Publikationsjahr: | 5 Mai 2023 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 106 |
| (Heft-)Nummer: | 7 |
| DOI: | 10.1111/jace.19088 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | The growing research interest in dislocation-tuned functionality in ceramics is evident, with the most recent proofs-of-concept for enhanced ferroelectric properties, electrical conductivity, and superconductivity via dislocations. In this work, we focus on dislocation-tuned mechanical properties and demonstrate that, by engineering high dislocation densities (up to 1014 m−2) into KNbO3 at room temperature, the fracture toughness can be improved by a factor of 2.8. The microstructures, including dislocations and domain walls, are examined by optical microscopy, electron channeling contrast imaging, piezo-response force microscopy, and transmission electron microscopy methods to shed light on the toughening mechanisms. In addition, high-temperature (above the Curie temperature of KNbO3) indentation tests were performed to exclude the influence of ferroelastic toughening, such that the origin of the toughening effect is pinpointed to be dislocations. |
| Freie Schlagworte: | dislocation, dislocation toughening, fracture toughness, oxide perovskite, room-temperature plasticity |
| 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 |
| Hinterlegungsdatum: | 08 Mai 2023 05:24 |
| Letzte Änderung: | 27 Nov 2023 07:28 |
| PPN: | 507592697 |
| Zugehörige Links: | |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Dislocation toughening in single‐crystal KNbO₃. (deposited 24 Nov 2023 13:24)
- Dislocation toughening in single-crystal KNbO3. (deposited 08 Mai 2023 05:24) [Gegenwärtig angezeigt]
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