Denkhaus, Sarah Marie ; Vögler, Malte ; Novak, Nikola ; Rödel, Jürgen (2017)
Short crack fracture toughness in (1-x)(Na1/2Bi1/2)
TiO3–xBaTiO3 relaxor ferroelectrics.
In: Journal of the American Ceramic Society, 100 (10)
doi: 10.1111/jace.15008
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The fracture toughness in the lead-free relaxor ferroelectric (1-x)(Na1/2Bi1/2) TiO3–xBaTiO3 was investigated utilizing the surface crack in flexure method. To allow a comprehensive assessment, unpoled, and poled samples from the rhombohedral, the tetragonal, and the morphotropic phase regime were considered. It was found that the fracture toughness is up to 23% higher for the poled state. In order to cover the transition from ferroelectric to relaxor phase, the temperature dependence of 0.97(Na1/2Bi1/2)TiO3–0.03BaTiO3 was studied as well. Fracture toughness values of up to 2 MPam1/2 were determined, which are considerably above data for lead zirconate titanate materials. The results are rationalized using a simple transformation toughening-type model in conjunction with investigations into the ferroelastic behavior. The presented model can be applied without fitting parameters but utilizes measurements of the coercive stress and remanent strain as well as the elastic modulus.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Denkhaus, Sarah Marie ; Vögler, Malte ; Novak, Nikola ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Short crack fracture toughness in (1-x)(Na1/2Bi1/2) TiO3–xBaTiO3 relaxor ferroelectrics |
| Sprache: | Englisch |
| Publikationsjahr: | 4 Oktober 2017 |
| Verlag: | The American Ceramic Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 100 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1111/jace.15008 |
| Kurzbeschreibung (Abstract): | The fracture toughness in the lead-free relaxor ferroelectric (1-x)(Na1/2Bi1/2) TiO3–xBaTiO3 was investigated utilizing the surface crack in flexure method. To allow a comprehensive assessment, unpoled, and poled samples from the rhombohedral, the tetragonal, and the morphotropic phase regime were considered. It was found that the fracture toughness is up to 23% higher for the poled state. In order to cover the transition from ferroelectric to relaxor phase, the temperature dependence of 0.97(Na1/2Bi1/2)TiO3–0.03BaTiO3 was studied as well. Fracture toughness values of up to 2 MPam1/2 were determined, which are considerably above data for lead zirconate titanate materials. The results are rationalized using a simple transformation toughening-type model in conjunction with investigations into the ferroelastic behavior. The presented model can be applied without fitting parameters but utilizes measurements of the coercive stress and remanent strain as well as the elastic modulus. |
| Zusätzliche Informationen: | Funding information Deutsche Forschungsgemeinschaft, Grant/ Award Number: RO954/25 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 04 Okt 2017 07:29 |
| Letzte Änderung: | 10 Sep 2020 12:20 |
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