Crack tip process zone domain switching in a soft lead zirconate titanate ceramic

Jacob L. Jones; S. Maziar Motahari; Mesut Varlioglu; Ulrich Lienert; Joel V. Bernier; Mark Hoffman; Ersan Üstündag

doi:10.1016/j.actamat.2007.06.012

Crack tip process zone domain switching in a soft lead zirconate titanate ceramic

Jacob L. Jones^*, S. Maziar Motahari, Mesut Varlioglu, Ulrich Lienert, Joel V. Bernier, Mark Hoffman, Ersan Üstündag

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

59 Citations (Scopus)

Abstract

Non-180° domain switching leads to fracture toughness enhancement in ferroelastic materials. Using a high-energy synchrotron X-ray source and a two-dimensional detector in transmission geometry, non-180° domain switching and crystallographic lattice strains were measured in situ around a crack tip in a soft tetragonal lead zirconate titanate ceramic. At K_I = 0.71 MPa m^1/2 and below the initiation toughness, the process zone size, spatial distribution of preferred domain orientations, and lattice strains near the crack tip are a strong function of direction within the plane of the compact tension specimen. Deviatoric stresses and strains calculated using a finite element model and projected to the same directions measured in diffraction correlate with the measured spatial distributions and directional dependencies. Some preferred orientations remain in the crack wake after the crack has propagated; within the crack wake, the tetragonal 0 0 1 axis has a preferred orientation both perpendicular to the crack face and toward the crack front.

Original language	English
Pages (from-to)	5538-5548
Number of pages	11
Journal	Acta Materialia
Volume	55
Issue number	16
DOIs	https://doi.org/10.1016/j.actamat.2007.06.012
Publication status	Published - Sept 2007
Externally published	Yes

Funding

This research was supported by the US National Science Foundation, award number OISE-0402066, the University of Florida, and the US Department of Energy via the Ames Laboratory. Use of the Advanced Photon Source was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The authors also acknowledge the technical assistance and helpful suggestions of G. Tutuncu (ISU), S.Y. Lee (ISU), and J. Almer (APS).

Funders	Funder number
Office of Basic Energy Sciences
US Department of Energy
US National Science Foundation	OISE-0402066
Office of Science
University of Florida
Ames Laboratory

Keywords

Ceramics
Ferroelectricity
Fracture
Toughness
X-ray diffraction (XRD)

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10.1016/j.actamat.2007.06.012

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title = "Crack tip process zone domain switching in a soft lead zirconate titanate ceramic",

abstract = "Non-180° domain switching leads to fracture toughness enhancement in ferroelastic materials. Using a high-energy synchrotron X-ray source and a two-dimensional detector in transmission geometry, non-180° domain switching and crystallographic lattice strains were measured in situ around a crack tip in a soft tetragonal lead zirconate titanate ceramic. At KI = 0.71 MPa m1/2 and below the initiation toughness, the process zone size, spatial distribution of preferred domain orientations, and lattice strains near the crack tip are a strong function of direction within the plane of the compact tension specimen. Deviatoric stresses and strains calculated using a finite element model and projected to the same directions measured in diffraction correlate with the measured spatial distributions and directional dependencies. Some preferred orientations remain in the crack wake after the crack has propagated; within the crack wake, the tetragonal 0 0 1 axis has a preferred orientation both perpendicular to the crack face and toward the crack front.",

keywords = "Ceramics, Ferroelectricity, Fracture, Toughness, X-ray diffraction (XRD)",

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year = "2007",

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doi = "10.1016/j.actamat.2007.06.012",

language = "English",

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T1 - Crack tip process zone domain switching in a soft lead zirconate titanate ceramic

AU - Jones, Jacob L.

AU - Motahari, S. Maziar

AU - Varlioglu, Mesut

AU - Lienert, Ulrich

AU - Bernier, Joel V.

AU - Hoffman, Mark

AU - Üstündag, Ersan

PY - 2007/9

Y1 - 2007/9

N2 - Non-180° domain switching leads to fracture toughness enhancement in ferroelastic materials. Using a high-energy synchrotron X-ray source and a two-dimensional detector in transmission geometry, non-180° domain switching and crystallographic lattice strains were measured in situ around a crack tip in a soft tetragonal lead zirconate titanate ceramic. At KI = 0.71 MPa m1/2 and below the initiation toughness, the process zone size, spatial distribution of preferred domain orientations, and lattice strains near the crack tip are a strong function of direction within the plane of the compact tension specimen. Deviatoric stresses and strains calculated using a finite element model and projected to the same directions measured in diffraction correlate with the measured spatial distributions and directional dependencies. Some preferred orientations remain in the crack wake after the crack has propagated; within the crack wake, the tetragonal 0 0 1 axis has a preferred orientation both perpendicular to the crack face and toward the crack front.

AB - Non-180° domain switching leads to fracture toughness enhancement in ferroelastic materials. Using a high-energy synchrotron X-ray source and a two-dimensional detector in transmission geometry, non-180° domain switching and crystallographic lattice strains were measured in situ around a crack tip in a soft tetragonal lead zirconate titanate ceramic. At KI = 0.71 MPa m1/2 and below the initiation toughness, the process zone size, spatial distribution of preferred domain orientations, and lattice strains near the crack tip are a strong function of direction within the plane of the compact tension specimen. Deviatoric stresses and strains calculated using a finite element model and projected to the same directions measured in diffraction correlate with the measured spatial distributions and directional dependencies. Some preferred orientations remain in the crack wake after the crack has propagated; within the crack wake, the tetragonal 0 0 1 axis has a preferred orientation both perpendicular to the crack face and toward the crack front.

KW - Ceramics

KW - Ferroelectricity

KW - Fracture

KW - Toughness

KW - X-ray diffraction (XRD)

UR - https://www.scopus.com/pages/publications/34548116575

U2 - 10.1016/j.actamat.2007.06.012

DO - 10.1016/j.actamat.2007.06.012

M3 - Article

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SN - 1359-6454

VL - 55

SP - 5538

EP - 5548

JO - Acta Materialia

JF - Acta Materialia

IS - 16

ER -

Crack tip process zone domain switching in a soft lead zirconate titanate ceramic

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Keywords

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