Stich, Stephan ; Ding, Kuan ; Muhammad, Qaisar Khushi ; Porz, Lukas ; Minnert, Christian ; Rheinheimer, Wolfgang ; Durst, Karsten ; Rödel, Jürgen ; Frömling, Till ; Fang, Xufei (2023)
Room‐temperature dislocation plasticity in SrTiO₃ tuned by defect chemistry.
In: Journal of the American Ceramic Society, 2021, 105 (2)
doi: 10.26083/tuprints-00023235
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
Dislocations have been identified to modify both the functional and mechanical properties of some ceramic materials. Succinct control of dislocation-based plasticity in ceramics will also demand knowledge about dislocation interaction with point defects. Here, we propose an experimental approach to modulate the dislocation-based plasticity in single-crystal SrTiO₃ based on the concept of defect chemistry engineering, for example, by increasing the oxygen vacancy concentration via reduction treatment. With nanoindentation and bulk compression tests, we find that the dislocation-governed plasticity is significantly modified at the nano-/microscale, compared to the bulk scale. The increase in oxygen vacancy concentration after reduction treatment was assessed by impedance spectroscopy and is found to favor dislocation nucleation but impede dislocation motion as rationalized by the nanoindentation pop-in and nanoindentation creep tests.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Stich, Stephan ; Ding, Kuan ; Muhammad, Qaisar Khushi ; Porz, Lukas ; Minnert, Christian ; Rheinheimer, Wolfgang ; Durst, Karsten ; Rödel, Jürgen ; Frömling, Till ; Fang, Xufei |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Room‐temperature dislocation plasticity in SrTiO₃ tuned by defect chemistry |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2021 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 105 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.26083/tuprints-00023235 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/23235 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | Dislocations have been identified to modify both the functional and mechanical properties of some ceramic materials. Succinct control of dislocation-based plasticity in ceramics will also demand knowledge about dislocation interaction with point defects. Here, we propose an experimental approach to modulate the dislocation-based plasticity in single-crystal SrTiO₃ based on the concept of defect chemistry engineering, for example, by increasing the oxygen vacancy concentration via reduction treatment. With nanoindentation and bulk compression tests, we find that the dislocation-governed plasticity is significantly modified at the nano-/microscale, compared to the bulk scale. The increase in oxygen vacancy concentration after reduction treatment was assessed by impedance spectroscopy and is found to favor dislocation nucleation but impede dislocation motion as rationalized by the nanoindentation pop-in and nanoindentation creep tests. |
| Freie Schlagworte: | defect chemistry engineering, dislocation plasticity, nanoindentation, oxygen vacancy, strontium titanate |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-232359 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 540 Chemie |
| 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: | 15 Feb 2023 13:24 |
| Letzte Änderung: | 16 Feb 2023 05:59 |
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- Room‐temperature dislocation plasticity in SrTiO₃ tuned by defect chemistry. (deposited 15 Feb 2023 13:24) [Gegenwärtig angezeigt]
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