Leist, Thorsten ; Brötz, Joachim ; Seo, Yo-Han ; Cheng, Shumeng ; Webber, Kyle G. (2012)
Crack growth resistance behavior of lanthanum doped bismuth ferrite–lead titanate: Effect of tetragonality and mixed phase crystal structures.
In: Engineering Fracture Mechanics, 96
doi: 10.1016/j.engfracmech.2012.08.008
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The room temperature crack growth resistance behavior of polycrystalline lanthanum-doped bismuth ferrite-lead titanate was characterized with disc compact-tension specimens. Through lanthanum doping the tetragonality can be adjusted from 1.01 to 1.10, while retaining a mixed phase system. Experimental measurements show changes in toughening behavior with increasing c/a ratio. Fracture results are discussed in conjunction with macroscopic ferroelastic constitutive behavior and stress-dependent neutron diffraction measurements to elucidate the role of a mixed phase system with heterogeneous mechanical properties. Additional X-ray diffraction measurements were performed to determine the effect of possible crack-tip stress-induced phase transformations on R-curve behavior.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Leist, Thorsten ; Brötz, Joachim ; Seo, Yo-Han ; Cheng, Shumeng ; Webber, Kyle G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Crack growth resistance behavior of lanthanum doped bismuth ferrite–lead titanate: Effect of tetragonality and mixed phase crystal structures |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Dezember 2012 |
| Verlag: | Elsevier Science Publishing Company |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Engineering Fracture Mechanics |
| Jahrgang/Volume einer Zeitschrift: | 96 |
| DOI: | 10.1016/j.engfracmech.2012.08.008 |
| Kurzbeschreibung (Abstract): | The room temperature crack growth resistance behavior of polycrystalline lanthanum-doped bismuth ferrite-lead titanate was characterized with disc compact-tension specimens. Through lanthanum doping the tetragonality can be adjusted from 1.01 to 1.10, while retaining a mixed phase system. Experimental measurements show changes in toughening behavior with increasing c/a ratio. Fracture results are discussed in conjunction with macroscopic ferroelastic constitutive behavior and stress-dependent neutron diffraction measurements to elucidate the role of a mixed phase system with heterogeneous mechanical properties. Additional X-ray diffraction measurements were performed to determine the effect of possible crack-tip stress-induced phase transformations on R-curve behavior. |
| Freie Schlagworte: | Ferroelastic toughening; Fracture of ferroelectrics; Ferroelasticity; Process zone |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Elektromechanik von Oxiden 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 19 Nov 2012 09:44 |
| Letzte Änderung: | 27 Feb 2014 15:00 |
| PPN: | |
| Sponsoren: | We are grateful to Deutsche Forschungsgemeinschaft for financing this work under Contract Number RO 954/20. |
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