Tan, Xiaoli ; Young, S. E. ; Seo, Yo-Han ; Zhang, J. Y. ; Hong, W. ; Webber, Kyle G. (2014)
Transformation toughening in an antiferroelectric ceramic.
In: Acta Materialia, 62
doi: 10.1016/j.actamat.2013.09.038
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Due to a larger specific volume of the ferroelectric phase, the antiferroelectric-to-ferroelectric transition is believed to have an enhanced toughening effect against fracture. The toughening requires a non-recoverable transformation in the crack process zone. Complementary measurement of the crystal symmetry, dielectric constant, field-induced polarization and Raman spectrum on ceramic Pb0.99Nb0.02[(Zr0.57Sn0.43)0.92Ti0.08]0.98O3 indicates that the antiferroelectric and the ferroelectric states are equally stable at room temperature. Raman mapping further reveals the presence of the ferroelectric phase in a localized zone at the crack tip after unloading. A significant phase-transition-toughening effect is demonstrated in the antiferroelectric ceramic with both indentation fracture and R-curve experiments. The effect in this model composition leads to toughness values ∼50% larger than other antiferroelectric ceramics with similar compositions and 60–130% higher than ferroelectric Pb(Zr, Ti)O3 ceramics. A simple analysis confirms the toughening effect from both volumetric phase transition and deviatoric domain switching during the transformation. The results suggest that other materials near phase boundaries may have similar high fracture resistance.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Tan, Xiaoli ; Young, S. E. ; Seo, Yo-Han ; Zhang, J. Y. ; Hong, W. ; Webber, Kyle G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Transformation toughening in an antiferroelectric ceramic |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 62 |
| DOI: | 10.1016/j.actamat.2013.09.038 |
| Kurzbeschreibung (Abstract): | Due to a larger specific volume of the ferroelectric phase, the antiferroelectric-to-ferroelectric transition is believed to have an enhanced toughening effect against fracture. The toughening requires a non-recoverable transformation in the crack process zone. Complementary measurement of the crystal symmetry, dielectric constant, field-induced polarization and Raman spectrum on ceramic Pb0.99Nb0.02[(Zr0.57Sn0.43)0.92Ti0.08]0.98O3 indicates that the antiferroelectric and the ferroelectric states are equally stable at room temperature. Raman mapping further reveals the presence of the ferroelectric phase in a localized zone at the crack tip after unloading. A significant phase-transition-toughening effect is demonstrated in the antiferroelectric ceramic with both indentation fracture and R-curve experiments. The effect in this model composition leads to toughness values ∼50% larger than other antiferroelectric ceramics with similar compositions and 60–130% higher than ferroelectric Pb(Zr, Ti)O3 ceramics. A simple analysis confirms the toughening effect from both volumetric phase transition and deviatoric domain switching during the transformation. The results suggest that other materials near phase boundaries may have similar high fracture resistance. |
| Freie Schlagworte: | Antiferroelectric ceramics; Phase transition toughening; Raman mapping; R-curve |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Elektromechanik von Oxiden 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 14 Apr 2014 10:42 |
| Letzte Änderung: | 22 Mär 2016 13:15 |
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