Salem, Mostafa Negm ; Ding, Kuan ; Rödel, Jürgen ; Fang, Xufei (2023)
Thermally enhanced dislocation density improves both hardness and fracture toughness in single-crystal SrTiO3.
In: Journal of the American Ceramic Society, 106 (2)
doi: 10.1111/jace.18839
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Dislocation-tuned functionality in ceramic oxides for potential versatile applications gains increasing attention. As the widespread chemical doping suffers from poor temperature stability, dislocations in well-controlled mesoscopic structure may be an alternative to thermally stable intrinsic doping features. To this end, the dislocation density in plastic zones introduced by cyclic Brinell indentation is considered under thermal annealing conditions. The considerably enhanced dislocation density due to thermal treatment is found to impact both microhardness and fracture toughness, albeit only to amodest degree. Themechanistic understanding centers around enhanced mobility and multiplication of the pre-engineered dislocations at elevated temperatures driven by the residual indentation stress, as well as the strengthened interaction of point defects and dislocations at high temperature.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Salem, Mostafa Negm ; Ding, Kuan ; Rödel, Jürgen ; Fang, Xufei |
| Art des Eintrags: | Bibliographie |
| Titel: | Thermally enhanced dislocation density improves both hardness and fracture toughness in single-crystal SrTiO3 |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 106 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1111/jace.18839 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Dislocation-tuned functionality in ceramic oxides for potential versatile applications gains increasing attention. As the widespread chemical doping suffers from poor temperature stability, dislocations in well-controlled mesoscopic structure may be an alternative to thermally stable intrinsic doping features. To this end, the dislocation density in plastic zones introduced by cyclic Brinell indentation is considered under thermal annealing conditions. The considerably enhanced dislocation density due to thermal treatment is found to impact both microhardness and fracture toughness, albeit only to amodest degree. Themechanistic understanding centers around enhanced mobility and multiplication of the pre-engineered dislocations at elevated temperatures driven by the residual indentation stress, as well as the strengthened interaction of point defects and dislocations at high temperature. |
| Freie Schlagworte: | dislocation, fracture toughness, hardness, strontium titanate, thermal treatment |
| Zusätzliche Informationen: | First published online: 06 October 2022 |
| 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: | 12 Dez 2022 06:43 |
| Letzte Änderung: | 29 Nov 2023 10:32 |
| PPN: | 502502746 |
| Zugehörige Links: | |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Thermally enhanced dislocation density improves both hardness and fracture toughness in single‐crystal SrTiO₃. (deposited 28 Nov 2023 10:21)
- Thermally enhanced dislocation density improves both hardness and fracture toughness in single-crystal SrTiO3. (deposited 12 Dez 2022 06:43) [Gegenwärtig angezeigt]
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