Nuffer, Jürgen ; Lupascu, Doru C. ; Rödel, Jürgen (2001)
Microcrack Clouds in Fatigued Electrostrictive 9.5/65/35 PLZT.
In: Journal of the European Ceramic Society, 21 (10-11)
doi: 10.1016/S0955-2219(01)00032-2
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2001 |
| Autor(en): | Nuffer, Jürgen ; Lupascu, Doru C. ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Microcrack Clouds in Fatigued Electrostrictive 9.5/65/35 PLZT |
| Sprache: | Englisch |
| Publikationsjahr: | 2001 |
| Verlag: | ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 21 |
| (Heft-)Nummer: | 10-11 |
| DOI: | 10.1016/S0955-2219(01)00032-2 |
| Kurzbeschreibung (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. |
| Freie Schlagworte: | ELECTRICALLY INDUCED MICROCRACKING; ZIRCONATE-TITANATE CERAMICS; FERROELECTRIC CERAMICS; PZT CERAMICS; ACTUATORS; RELIABILITY; DAMAGE |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 14 Jul 2011 10:42 |
| Letzte Änderung: | 05 Mär 2013 09:50 |
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