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, pp. 267-275. Elsevier Science Publishing Company, ISSN 00137944,
[Article]
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2012 |
| Creators: | Leist, Thorsten ; Brötz, Joachim ; Seo, Yo-Han ; Cheng, Shumeng ; Webber, Kyle G. |
| Title: | Crack growth resistance behavior of lanthanum doped bismuth ferrite–lead titanate: Effect of tetragonality and mixed phase crystal structures |
| Language: | English |
| 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. |
| Journal or Publication Title: | Engineering Fracture Mechanics |
| Volume of the journal: | 96 |
| Publisher: | Elsevier Science Publishing Company |
| Uncontrolled Keywords: | Ferroelastic toughening; Fracture of ferroelectrics; Ferroelasticity; Process zone |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials |
| Date Deposited: | 19 Nov 2012 09:44 |
| URL / URN: | http://dx.doi.org/10.1016/j.engfracmech.2012.08.008 |
| Identification Number: | doi:10.1016/j.engfracmech.2012.08.008 |
| PPN: | |
| Funders: | We are grateful to Deutsche Forschungsgemeinschaft for financing this work under Contract Number RO 954/20. |
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