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Experimental studies on crack growth in ferroelectric ceramics / von Dipl.-Ing. Andrea Raphaela Engert.
- Format:
- Book
- Author/Creator:
- Engert, Andrea Raphaela, author.
- Language:
- English
- Subjects (All):
- Ferroelectric crystals.
- Electronic ceramics.
- Physical Description:
- 1 online resource (137 pages) : illustrations
- Place of Publication:
- Göttingen, [Germany] : Cuvillier Verlag, 2013.
- Summary:
- This experimental work seeks to add to the understanding of fracture of ferroelectric ceramics. R-curve measurements with additional electrical loads show that AC electrical loading causes a drop in the critical mechanical load. The surface potential distribution around a stationary crack under various electromechanical loading conditions, measured with Kelvin Force Microscopy, is used to determine an effective dielectric constant of the crack, which is shown to depend on the distance from the crack tip, the electric and mechanical load and which changes with time and successive loading cycles.Experimentelle Untersuchungen zum Bruchverhalten von ferroelektrischen Keramiken. Risswiderstands-Kurven (R-Kurven) zur Untersuchung von Risswachstum bei verschiedenen kombinierten elektromechanischen Lasten zeigen, dass eine elektrische Wechsellast die kritische mechanische Last verringert. Untersuchungen des Oberflächenpotentials um ruhende durchgehende Risse mittels Kelvin Force Microscopy (KFM) und die Ableitung der effektiven Dielektrizitätskonstanten zur Beschreibung des dielektrische Verhaltens des Risses zeigen, dass letztere vom Abstand zur Rissspitze, von der elektromechanischen Last abhängt und sich mit der Zeit und mit zunehmenden Lastzyklen verändert.
- Notes:
- Includes bibliographical references.
- Description based on online resource; title from PDF title page (ebrary, viewed September 29, 2017).
- ISBN:
- 9783736944640
- 3736944640
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