Vögler, Malte ; Daniels, John E. ; Webber, Kyle G. ; Rödel, Jürgen (2017)
Absence of toughening behavior in 0.94(Na1/2Bi1/2)TiO3-0.06BaTiO3
relaxor ceramic.
In: Scripta Materialia, 136
doi: 10.1016/j.scriptamat.2017.04.023
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The fracture behavior of the unpoled 0.94(Na1/2Bi1/2)TiO3-0.06BaTiO3 relaxor ferroelectricwas investigated. Previous studies indicated that a metastable ferroelectric long-range order can be induced by mechanical stresses,which could lead to a crack tip process zone and increasing crack resistance during crack growth. Crack propagation in compact tension samples yielded a constant crack resistance as function of crack length. This is consistent with ex situ x-ray diffraction experiments,where a remanent induced process zone on the fracture surface could not be detected. We suggest the very high transformation stress, determined via macroscopic stress-strain measurements,is responsible for the absence of toughening. © 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Vögler, Malte ; Daniels, John E. ; Webber, Kyle G. ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Absence of toughening behavior in 0.94(Na1/2Bi1/2)TiO3-0.06BaTiO3 relaxor ceramic |
| Sprache: | Englisch |
| Publikationsjahr: | 2 Mai 2017 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Scripta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 136 |
| DOI: | 10.1016/j.scriptamat.2017.04.023 |
| Kurzbeschreibung (Abstract): | The fracture behavior of the unpoled 0.94(Na1/2Bi1/2)TiO3-0.06BaTiO3 relaxor ferroelectricwas investigated. Previous studies indicated that a metastable ferroelectric long-range order can be induced by mechanical stresses,which could lead to a crack tip process zone and increasing crack resistance during crack growth. Crack propagation in compact tension samples yielded a constant crack resistance as function of crack length. This is consistent with ex situ x-ray diffraction experiments,where a remanent induced process zone on the fracture surface could not be detected. We suggest the very high transformation stress, determined via macroscopic stress-strain measurements,is responsible for the absence of toughening. © 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Freie Schlagworte: | Relaxor Fracture toughness Lead-free NBT-BT Ferroelectric |
| 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: | 02 Mai 2017 07:31 |
| Letzte Änderung: | 17 Jul 2020 10:26 |
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