Okafor, Chukwudalu ; Ding, Kuan ; Zhou, Xiandong ; Durst, Karsten ; Rödel, Jürgen ; Fang, Xufei (2022)
Mechanical tailoring of dislocation densities in SrTiO3 at
room temperature.
In: Journal of the American Ceramic Society, 105 (4)
doi: 10.1111/jace.18277
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Dislocation-tuned functional properties such as electrical conductivity, thermal conductivity, and ferroelectric properties in oxides are attracting increasing research interest. A prerequisite for harvesting these functional properties in oxides requires successful introduction and control of dislocation density and arrangement without forming cracks, which is a great challenge due to their brittle nature. Here, we report a simple method to mechanically tailor the dislocation densities in single-crystal perovskite SrTiO3. By using a millimeter-sized Brinell indenter, dislocation densities from ∼1010 to ∼1013 m−2 are achieved by increasing the number of indenting cycles. Depending on tip radius and indenting load, large and crack-free plastic zones over hundreds of micrometers are created. The dislocation multiplication mechanisms are discussed, and the work hardening in the plastic zone is evaluated by micro-hardness measurement as a function of dislocation density. This simple approach opens many new opportunities in the area of dislocation-tuned functional and mechanical studies.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Okafor, Chukwudalu ; Ding, Kuan ; Zhou, Xiandong ; Durst, Karsten ; Rödel, Jürgen ; Fang, Xufei |
| Art des Eintrags: | Bibliographie |
| Titel: | Mechanical tailoring of dislocation densities in SrTiO3 at room temperature |
| Sprache: | Englisch |
| Publikationsjahr: | 3 Februar 2022 |
| Verlag: | Wiley-Blackwell |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 105 |
| (Heft-)Nummer: | 4 |
| DOI: | 10.1111/jace.18277 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Dislocation-tuned functional properties such as electrical conductivity, thermal conductivity, and ferroelectric properties in oxides are attracting increasing research interest. A prerequisite for harvesting these functional properties in oxides requires successful introduction and control of dislocation density and arrangement without forming cracks, which is a great challenge due to their brittle nature. Here, we report a simple method to mechanically tailor the dislocation densities in single-crystal perovskite SrTiO3. By using a millimeter-sized Brinell indenter, dislocation densities from ∼1010 to ∼1013 m−2 are achieved by increasing the number of indenting cycles. Depending on tip radius and indenting load, large and crack-free plastic zones over hundreds of micrometers are created. The dislocation multiplication mechanisms are discussed, and the work hardening in the plastic zone is evaluated by micro-hardness measurement as a function of dislocation density. This simple approach opens many new opportunities in the area of dislocation-tuned functional and mechanical studies. |
| Freie Schlagworte: | Cyclic loading, dislocations, hardness, strontium titanate |
| 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: | 04 Feb 2022 07:06 |
| Letzte Änderung: | 03 Jul 2024 02:55 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
-
Mechanical tailoring of dislocation densities in SrTiO₃ at room temperature. (deposited 08 Jul 2022 11:29)
- Mechanical tailoring of dislocation densities in SrTiO3 at room temperature. (deposited 04 Feb 2022 07:06) [Gegenwärtig angezeigt]
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum