Fracture and domain switching by indentation in barium titanate single crystals

M. J. Busche; K. J. Hsia

doi:10.1016/S1359-6462(00)00588-1

Fracture and domain switching by indentation in barium titanate single crystals

M. J. Busche, K. J. Hsia

University of Illinois Urbana-Champaign

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

Abstract

Indentation technique is used to study cleavage fracture in single crystalline barium titanate. Interesting crack patterns, which differ drastically from the Vickers indentation fracture patterns in polycrystalline ceramics, reveal that cleavage fracture takes place on {113} planes. However, cleavage fracture occurs only on the {113} planes nearly perpendicular to the poling direction, but not on {113} planes roughly parallel to the poling direction. Such fracture anisotropy is explained by the mechanism of 90° domain switch induced toughening. Extensive domain switch is observed around the arrested crack tips. The switch is caused by the compressive radial stress field surrounding the indentation.

Original language	English (US)
Pages (from-to)	207-212
Number of pages	6
Journal	Scripta Materialia
Volume	44
Issue number	2
DOIs	https://doi.org/10.1016/S1359-6462(00)00588-1
State	Published - Feb 2 2001

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/S1359-6462(00)00588-1

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title = "Fracture and domain switching by indentation in barium titanate single crystals",

abstract = "Indentation technique is used to study cleavage fracture in single crystalline barium titanate. Interesting crack patterns, which differ drastically from the Vickers indentation fracture patterns in polycrystalline ceramics, reveal that cleavage fracture takes place on {113} planes. However, cleavage fracture occurs only on the {113} planes nearly perpendicular to the poling direction, but not on {113} planes roughly parallel to the poling direction. Such fracture anisotropy is explained by the mechanism of 90° domain switch induced toughening. Extensive domain switch is observed around the arrested crack tips. The switch is caused by the compressive radial stress field surrounding the indentation.",

author = "Busche, {M. J.} and Hsia, {K. J.}",

note = "Funding Information: This work has been supported by the National Science Foundation under grants No. CMS 95-22661 and CMS 98-72306 . Initial discussion with Prof. H. Gao of Stanford University is greatly appreciated. Indentation and microscopy was carried out at the Center for Microanalysis of Materials in the Frederick Seitz Materials Research Laboratory, University of Illinois, which is supported by the U.S. Department of Energy under grant No. DEFG02-96-ER45439 . ",

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AU - Busche, M. J.

AU - Hsia, K. J.

N1 - Funding Information: This work has been supported by the National Science Foundation under grants No. CMS 95-22661 and CMS 98-72306 . Initial discussion with Prof. H. Gao of Stanford University is greatly appreciated. Indentation and microscopy was carried out at the Center for Microanalysis of Materials in the Frederick Seitz Materials Research Laboratory, University of Illinois, which is supported by the U.S. Department of Energy under grant No. DEFG02-96-ER45439 .

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Y1 - 2001/2/2

N2 - Indentation technique is used to study cleavage fracture in single crystalline barium titanate. Interesting crack patterns, which differ drastically from the Vickers indentation fracture patterns in polycrystalline ceramics, reveal that cleavage fracture takes place on {113} planes. However, cleavage fracture occurs only on the {113} planes nearly perpendicular to the poling direction, but not on {113} planes roughly parallel to the poling direction. Such fracture anisotropy is explained by the mechanism of 90° domain switch induced toughening. Extensive domain switch is observed around the arrested crack tips. The switch is caused by the compressive radial stress field surrounding the indentation.

AB - Indentation technique is used to study cleavage fracture in single crystalline barium titanate. Interesting crack patterns, which differ drastically from the Vickers indentation fracture patterns in polycrystalline ceramics, reveal that cleavage fracture takes place on {113} planes. However, cleavage fracture occurs only on the {113} planes nearly perpendicular to the poling direction, but not on {113} planes roughly parallel to the poling direction. Such fracture anisotropy is explained by the mechanism of 90° domain switch induced toughening. Extensive domain switch is observed around the arrested crack tips. The switch is caused by the compressive radial stress field surrounding the indentation.

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Fracture and domain switching by indentation in barium titanate single crystals

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