Transformation toughening in an antiferroelectric ceramic

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Tan X, Young S, Seo YH, Zhang J, Hong W, Webber K
Zeitschrift: Acta Materialia
Verlag: Elsevier
Jahr der Veröffentlichung: 2014
Band: 62
Seitenbereich: 114-121
ISSN: 1359-6454
Sprache: Englisch


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)(0.92)Ti-0.08](0.98)O-3 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 similar to 50% larger than other antiferroelectric ceramics with similar compositions and 60-130% higher than ferroelectric Pb(Zr,Ti)O-3 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. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.



FAU-Autoren / FAU-Herausgeber

Webber, Kyle Prof.
Professur für Werkstoffwissenschaften (Funktionskeramik)


Autor(en) der externen Einrichtung(en)
Iowa State University of Science and Technology (ISU)
Technische Universität Darmstadt


Zitierweisen

APA:
Tan, X., Young, S., Seo, Y.-H., Zhang, J., Hong, W., & Webber, K. (2014). Transformation toughening in an antiferroelectric ceramic. Acta Materialia, 62, 114-121. https://dx.doi.org/10.1016/j.actamat.2013.09.038

MLA:
Tan, Xiaoli, et al. "Transformation toughening in an antiferroelectric ceramic." Acta Materialia 62 (2014): 114-121.

BibTeX: 

Zuletzt aktualisiert 2018-11-08 um 02:43