Fang, Xufei ; Zhang, Jiawen ; Frisch, Alexander ; Preuß, Oliver ; Okafor, Chukwudalu ; Setvin, Martin ; Lu, Wenjin (2024)
Room-temperature bulk plasticity and tunable dislocation densities in KTaO3.
In: Journal of the American Ceramic Society
doi: 10.1111/jace.20040
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report room-temperature bulk plasticity mediated by dislocations in single-crystal cubic potassium tantalate oxide (KTaO3 ), contrasting the conventional knowledge that single-crystal KTaO3 is susceptible to brittle fracture. A mechanics-based combinatorial experimental approach using cyclic Brinell indentation, scratching, and uniaxial bulk compression consistently demonstrates room-temperature dislocation plasticity in KTaO3 from the mesoscale to the macroscale. This approach also delivers tunable dislocation densities and plastic zone size. Scanning transmission electron microscopy analysis underpins the activated slip system to be <110> {1̄10}. Given the growing significance of KTaO 3 as an emerging electronic oxide and the increasing interest in dislocations for tuning the physical properties of oxides, our findings are expected to trigger synergistic research interest in KTaO3 with tunable dislocation densities.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Fang, Xufei ; Zhang, Jiawen ; Frisch, Alexander ; Preuß, Oliver ; Okafor, Chukwudalu ; Setvin, Martin ; Lu, Wenjin |
| Art des Eintrags: | Bibliographie |
| Titel: | Room-temperature bulk plasticity and tunable dislocation densities in KTaO3 |
| Sprache: | Englisch |
| Publikationsjahr: | 3 Juli 2024 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Kollation: | 8 Seiten |
| DOI: | 10.1111/jace.20040 |
| Kurzbeschreibung (Abstract): | We report room-temperature bulk plasticity mediated by dislocations in single-crystal cubic potassium tantalate oxide (KTaO3 ), contrasting the conventional knowledge that single-crystal KTaO3 is susceptible to brittle fracture. A mechanics-based combinatorial experimental approach using cyclic Brinell indentation, scratching, and uniaxial bulk compression consistently demonstrates room-temperature dislocation plasticity in KTaO3 from the mesoscale to the macroscale. This approach also delivers tunable dislocation densities and plastic zone size. Scanning transmission electron microscopy analysis underpins the activated slip system to be <110> {1̄10}. Given the growing significance of KTaO 3 as an emerging electronic oxide and the increasing interest in dislocations for tuning the physical properties of oxides, our findings are expected to trigger synergistic research interest in KTaO3 with tunable dislocation densities. |
| Freie Schlagworte: | bulk compression, cyclic deformation, dislocation, KTaO 3, scanning transmission electron microscopy |
| 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: | 24 Jul 2024 08:43 |
| Letzte Änderung: | 24 Jul 2024 12:15 |
| PPN: | 520116755 |
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