Kounga Njiwa, Alain Brice ; Lupascu, Doru C. ; Rödel, Jürgen (2004)
Crack tip switching zone in ferroelectric ferroelastic materials.
In: Acta Materialia, 52 (16)
doi: 10.1016/j.actamat.2004.06.047
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A novel liquid crystal display was utilized to monitor electric surface potentials in front of a crack tip in a ferroelectric ferroelastic material, lead zirconate titanate (PZT). The electric potential could be converted to yield the radial stress and strain distribution in front of the crack which afforded determination of the domain switching zone as well as the hardening coefficient. This zone shape as well as its evolution during crack growth was monitored. In contrast to transformation toughening materials, the crack tip process zone size was demonstrated to first increase and then decrease with increasing crack length.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2004 |
| Autor(en): | Kounga Njiwa, Alain Brice ; Lupascu, Doru C. ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Crack tip switching zone in ferroelectric ferroelastic materials |
| Sprache: | Englisch |
| Publikationsjahr: | September 2004 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 52 |
| (Heft-)Nummer: | 16 |
| DOI: | 10.1016/j.actamat.2004.06.047 |
| Kurzbeschreibung (Abstract): | A novel liquid crystal display was utilized to monitor electric surface potentials in front of a crack tip in a ferroelectric ferroelastic material, lead zirconate titanate (PZT). The electric potential could be converted to yield the radial stress and strain distribution in front of the crack which afforded determination of the domain switching zone as well as the hardening coefficient. This zone shape as well as its evolution during crack growth was monitored. In contrast to transformation toughening materials, the crack tip process zone size was demonstrated to first increase and then decrease with increasing crack length. |
| Freie Schlagworte: | PZT; Fracture; Process zone |
| 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: | 18 Mai 2011 15:19 |
| Letzte Änderung: | 05 Mär 2013 09:47 |
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