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Fracture behavior in electrically poled alkaline bismuth- and potassium- based lead-free piezoceramics using Vickers indentation

Wang, Xueyao ; Kodumudi Venkataraman, Lalitha ; Tan, Chi ; Li, Yingwei (2020)
Fracture behavior in electrically poled alkaline bismuth- and potassium- based lead-free piezoceramics using Vickers indentation.
In: Scripta Materialia, 194
doi: 10.1016/j.scriptamat.2020.113647
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

The fracture behavior of unpoled and electrically poled Ka 0.5 Na 0.5 NbO 3 (KNN)- and Na 1/2 Bi 1/2 TiO 3 (NBT)- based lead-free piezoceramics were characterized using the Vicker’s indentation technique and com- pared with soft Pb(Zr,Ti)O 3 piezoceramics. In the unpoled state, NBT-based piezoceramics demonstrate the largest fracture toughness in comparison with KNN-based and soft PZT piezoceramics due to its large intrinsic fracture toughness, which is in accordance with the previous reports. In the electrically poled state, KNN- and NBT- based piezoceramics exhibit large fracture toughness along the poling direction as opposed to perpendicular to the poling direction, with aspect ratios of 1.2 and 1.1, significantly smaller than that for PZT (1.8). The variations of the remanent strain and the process zone, which are related to the texture and the material properties during crack propagation were used to rationalize the results.

Typ des Eintrags: Artikel
Erschienen: 2020
Autor(en): Wang, Xueyao ; Kodumudi Venkataraman, Lalitha ; Tan, Chi ; Li, Yingwei
Art des Eintrags: Bibliographie
Titel: Fracture behavior in electrically poled alkaline bismuth- and potassium- based lead-free piezoceramics using Vickers indentation
Sprache: Englisch
Publikationsjahr: 30 November 2020
Verlag: Elsevier Science Publishing
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Scripta Materialia
Jahrgang/Volume einer Zeitschrift: 194
DOI: 10.1016/j.scriptamat.2020.113647
URL / URN: https://www.sciencedirect.com/science/article/abs/pii/S13596...
Kurzbeschreibung (Abstract):

The fracture behavior of unpoled and electrically poled Ka 0.5 Na 0.5 NbO 3 (KNN)- and Na 1/2 Bi 1/2 TiO 3 (NBT)- based lead-free piezoceramics were characterized using the Vicker’s indentation technique and com- pared with soft Pb(Zr,Ti)O 3 piezoceramics. In the unpoled state, NBT-based piezoceramics demonstrate the largest fracture toughness in comparison with KNN-based and soft PZT piezoceramics due to its large intrinsic fracture toughness, which is in accordance with the previous reports. In the electrically poled state, KNN- and NBT- based piezoceramics exhibit large fracture toughness along the poling direction as opposed to perpendicular to the poling direction, with aspect ratios of 1.2 and 1.1, significantly smaller than that for PZT (1.8). The variations of the remanent strain and the process zone, which are related to the texture and the material properties during crack propagation were used to rationalize the results.

Freie Schlagworte: Fracture toughness, Lead-free piezoceramics, Domain switching/phase transformation, Texture, Vicker’s indentation
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: 02 Dez 2020 07:33
Letzte Änderung: 02 Dez 2020 07:33
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