TU Darmstadt / ULB / TUbiblio

Microcrack Clouds in Fatigued Electrostrictive 9.5/65/35 PLZT

Nuffer, Jürgen and Lupascu, Doru C. and Rödel, Jürgen (2001):
Microcrack Clouds in Fatigued Electrostrictive 9.5/65/35 PLZT.
21, In: Journal of the European Ceramic Society, (10-11), ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND, pp. 1421-1423, ISSN 0955-2219, [Online-Edition: http://dx.doi.org/10.1016/S0955-2219(01)00032-2],
[Article]

Abstract

The formation of microcracks during cyclic bipolar fatigue is shown for purely dielectric electrostrictive 9.5/65/35 transparent lead-lanthanum-zirconate-titan ate (PLZT). The optically transparent material allows for the direct observation of broken grain facets. The maximum reached polarisation decreases by 30% after 3 x 10(6) cycles. The formation of microcrack clouds at the specimen edges and at macroscopic cracks are shown. No cracks were found in sample regions without obvious flaws present. By estimating the cracked volume, comparisons with FEM from previous studys allow to calculate the influence of the observed cracking on the polarization. As a consequence, the observed microcracks are considered to be mainly responsible for polarisation degradation.

Item Type: Article
Erschienen: 2001
Creators: Nuffer, Jürgen and Lupascu, Doru C. and Rödel, Jürgen
Title: Microcrack Clouds in Fatigued Electrostrictive 9.5/65/35 PLZT
Language: English
Abstract:

The formation of microcracks during cyclic bipolar fatigue is shown for purely dielectric electrostrictive 9.5/65/35 transparent lead-lanthanum-zirconate-titan ate (PLZT). The optically transparent material allows for the direct observation of broken grain facets. The maximum reached polarisation decreases by 30% after 3 x 10(6) cycles. The formation of microcrack clouds at the specimen edges and at macroscopic cracks are shown. No cracks were found in sample regions without obvious flaws present. By estimating the cracked volume, comparisons with FEM from previous studys allow to calculate the influence of the observed cracking on the polarization. As a consequence, the observed microcracks are considered to be mainly responsible for polarisation degradation.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 21
Number: 10-11
Publisher: ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Uncontrolled Keywords: ELECTRICALLY INDUCED MICROCRACKING; ZIRCONATE-TITANATE CERAMICS; FERROELECTRIC CERAMICS; PZT CERAMICS; ACTUATORS; RELIABILITY; DAMAGE
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 10:42
Official URL: http://dx.doi.org/10.1016/S0955-2219(01)00032-2
Identification Number: doi:10.1016/S0955-2219(01)00032-2
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)

View Item View Item