Fang, Xufei ; Ding, Kuan ; Janocha, Stephan ; Minnert, Christian ; Rheinheimer, Wolfgang ; Frömling, Till ; Durst, Karsten ; Nakamura, Atsutomo ; Rödel, Jürgen (2020)
Nanoscale to microscale reversal in room-temperature plasticity in SrTiO 3 by tuning defect concentration.
In: Scripta Materialia, (188)
doi: 10.1016/j.scriptamat.2020.07.033
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Incipient room-temperature plastic deformation in single-crystal SrTiO 3 at the nanoscale and the mi- croscale is contrasted by applying a scale-dependent indentation technique. Using nanoindentation pop- in, nanoindentation creep, and an evaluation of dislocation spacing via etch pit study, we demonstrate a reversal of yield stress for crystals with different vacancy concentrations and pre-existing dislocation densities. A competing mechanism between dislocation nucleation and dislocation motion on crystal plas- ticity at different length scales is highlighted. This finding enables us to complete the understanding of dislocation-mediated plasticity for ceramic oxides at the nanoscale as compared to the microscale and macroscale.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Fang, Xufei ; Ding, Kuan ; Janocha, Stephan ; Minnert, Christian ; Rheinheimer, Wolfgang ; Frömling, Till ; Durst, Karsten ; Nakamura, Atsutomo ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Nanoscale to microscale reversal in room-temperature plasticity in SrTiO 3 by tuning defect concentration |
| Sprache: | Englisch |
| Publikationsjahr: | November 2020 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Scripta Materialia |
| (Heft-)Nummer: | 188 |
| DOI: | 10.1016/j.scriptamat.2020.07.033 |
| Kurzbeschreibung (Abstract): | Incipient room-temperature plastic deformation in single-crystal SrTiO 3 at the nanoscale and the mi- croscale is contrasted by applying a scale-dependent indentation technique. Using nanoindentation pop- in, nanoindentation creep, and an evaluation of dislocation spacing via etch pit study, we demonstrate a reversal of yield stress for crystals with different vacancy concentrations and pre-existing dislocation densities. A competing mechanism between dislocation nucleation and dislocation motion on crystal plas- ticity at different length scales is highlighted. This finding enables us to complete the understanding of dislocation-mediated plasticity for ceramic oxides at the nanoscale as compared to the microscale and macroscale. |
| Freie Schlagworte: | Defects Room-temperature plasticity Dislocation nucleation and motion Nanoindentation SrTiO 3 |
| 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: | 30 Jul 2020 05:19 |
| Letzte Änderung: | 30 Jul 2020 05:19 |
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