Direct observation of ferroelastic domain switching in polycrystalline BaTiO3 using in situ neutron diffraction

Title: Direct observation of ferroelastic domain switching in polycrystalline BaTiO3 using in situ neutron diffraction
Creator: Forrester, Jennifer Sue; Kisi, Erich Herold; Studer, A. J.
Relation: Journal of the European Ceramic Society Vol. 25, no. 4, p. 447-454
Publisher: Elsevier Science
Resource Type: journal article
Date: 2005
Description: The extent and nature of ferroelastic re-orientation in a BaTiO3 ceramic under compressive stresses up to 150 MPa were studied using strain gauges and in-situ neutron powder diffraction. At greater than or equal to 10 MPa during the first loading, the unpoled crystals shows ferroelastic re-orientation. By 80 MPa similar to 12% of the material oriented for diffraction has switched. Nearly half of the switched material reverts to its original orientation upon relaxation of the load, leaving 7% permanently switched. Successive load cycles have little further effect. It is unlikely that the ferroelasticity observed here makes a significant contribution to toughening as it saturates at relatively low stresses, such as exist only in the outer region of the process zone.
Subject: BaTiO3; ferroelectric properties; ferroelastic domain switching; domains; neutron diffraction; lead-zirconate-titanate; barium-titanate; single-crystals; pzt; ceramics; behavior; stress; force
Identifier: uon:107
Identifier: http://hdl.handle.net/1959.13/25151
Identifier: ISSN:0955-2219
Language: eng
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