Stich, Stephan ; Ding, Kuan ; Muhammad, Qaisar Khushi ; Porz, Lukas ; Minnert, Christian ; Rheinheimer, Wolfgang ; Durst, Karsten ; Rödel, Jürgen ; Frömling, Till ; Fang, Xufei (2021)
Room-temperature dislocation plasticity in SrTiO3 tuned by
defect chemistry.
In: Journal of the American Ceramic Society
doi: 10.1111/jace.18118
Article, Bibliographie
This is the latest version of this item.
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2021 |
| Creators: | Stich, Stephan ; Ding, Kuan ; Muhammad, Qaisar Khushi ; Porz, Lukas ; Minnert, Christian ; Rheinheimer, Wolfgang ; Durst, Karsten ; Rödel, Jürgen ; Frömling, Till ; Fang, Xufei |
| Type of entry: | Bibliographie |
| Title: | Room-temperature dislocation plasticity in SrTiO3 tuned by defect chemistry |
| Language: | English |
| Date: | 13 September 2021 |
| Publisher: | Wiley |
| Journal or Publication Title: | Journal of the American Ceramic Society |
| DOI: | 10.1111/jace.18118 |
| Corresponding Links: | |
| 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. |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials |
| Date Deposited: | 11 Oct 2021 05:44 |
| Last Modified: | 03 Jul 2024 02:53 |
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| Suche nach Titel in: | TUfind oder in Google |
Available Versions of this Item
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Room‐temperature dislocation plasticity in SrTiO₃ tuned by defect chemistry. (deposited 15 Feb 2023 13:24)
- Room-temperature dislocation plasticity in SrTiO3 tuned by defect chemistry. (deposited 11 Oct 2021 05:44) [Currently Displayed]
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