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Crack‐tip toughness of lead‐free (1−x)(Na1/2Bi1/2)TiO3–xBaTiO3 piezoceramics

Vögler, Malte and Fett, Theo and Rödel, Jürgen (2018):
Crack‐tip toughness of lead‐free (1−x)(Na1/2Bi1/2)TiO3–xBaTiO3 piezoceramics.
In: Journal of the American Ceramic Society, Wiley, pp. 5304-5308, 2018, (101), ISSN 00027820,
DOI: 10.1111/jace.15972,
[Article]

Abstract

Crack opening displacements were evaluated on semi‐elliptical indentation cracks in lead‐free (1−x)(Na1/2Bi1/2)TiO3–xBaTiO3 piezoceramics and a commercially available PZT ceramic. The observed crack‐tip toughness of NBT‐xBT was found to be substantially higher than for PZT. Two evaluations for the crack opening displacement were demonstrated and contrasted: A more elaborate three‐termapproximation and a pragmatic utilization of the Irwin parabola.

Item Type: Article
Erschienen: 2018
Creators: Vögler, Malte and Fett, Theo and Rödel, Jürgen
Title: Crack‐tip toughness of lead‐free (1−x)(Na1/2Bi1/2)TiO3–xBaTiO3 piezoceramics
Language: English
Abstract:

Crack opening displacements were evaluated on semi‐elliptical indentation cracks in lead‐free (1−x)(Na1/2Bi1/2)TiO3–xBaTiO3 piezoceramics and a commercially available PZT ceramic. The observed crack‐tip toughness of NBT‐xBT was found to be substantially higher than for PZT. Two evaluations for the crack opening displacement were demonstrated and contrasted: A more elaborate three‐termapproximation and a pragmatic utilization of the Irwin parabola.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 2018
Number: 101
Publisher: Wiley
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 15 Oct 2018 06:30
DOI: 10.1111/jace.15972
Funders: Deutsche Forschungsgemeinschaft, Grant/ Award Number: DFG RO954/25
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