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Short Crack R-Curves in Ferroelectric and Electrostrictive PLZT

Chen, Wei and Lupascu, Doru C. and Rödel, Jürgen and Lynch, Christopher S. (2001):
Short Crack R-Curves in Ferroelectric and Electrostrictive PLZT.
In: Journal of the American Ceramic Society, pp. 593-597, 84, (3), [Online-Edition: http://dx.doi.org/10.1111/j.1151-2916.2001.tb00704.x],
[Article]

Abstract

This work describes the measurement of R-curve behavior in ferroelectric ceramics using four-point bend specimens with controlled semielliptical surface cracks. The results are compared for two compositions of lead lanthanum zirconate titanate. One exhibits ferroelastic behavior, the other electrostrictive linear elastic behavior. R-curves are measured in the crack length regime of 0.1 to 0.8 mm. The ferroelastic composition displays a toughness increase from 0.5 to 1.2 MPa·m1/2. The linear elastic composition displays a flat R-curve. The R-curve behavior is attributed to ferroelastic toughening.

Item Type: Article
Erschienen: 2001
Creators: Chen, Wei and Lupascu, Doru C. and Rödel, Jürgen and Lynch, Christopher S.
Title: Short Crack R-Curves in Ferroelectric and Electrostrictive PLZT
Language: English
Abstract:

This work describes the measurement of R-curve behavior in ferroelectric ceramics using four-point bend specimens with controlled semielliptical surface cracks. The results are compared for two compositions of lead lanthanum zirconate titanate. One exhibits ferroelastic behavior, the other electrostrictive linear elastic behavior. R-curves are measured in the crack length regime of 0.1 to 0.8 mm. The ferroelastic composition displays a toughness increase from 0.5 to 1.2 MPa·m1/2. The linear elastic composition displays a flat R-curve. The R-curve behavior is attributed to ferroelastic toughening.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 84
Number: 3
Uncontrolled Keywords: cracks/cracking; R-curve; lead lanthanum zirconate titanate
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 14 Jul 2011 11:00
Official URL: http://dx.doi.org/10.1111/j.1151-2916.2001.tb00704.x
Identification Number: doi:10.1111/j.1151-2916.2001.tb00704.x
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