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Dynamic processes of domain switching in lead zirconate titanate under cyclic mechanical loading by in situ neutron diffraction / Soodkhet Pojprapai(Imlao) in Acta materialia, Vol. 58 N° 6 (Avril 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 1897–1908 Titre : Dynamic processes of domain switching in lead zirconate titanate under cyclic mechanical loading by in situ neutron diffraction Type de document : texte imprimé Auteurs : Soodkhet Pojprapai(Imlao), Auteur ; Zhenhua Luo, Auteur ; Bjørn Clausen, Auteur Année de publication : 2011 Article en page(s) : pp. 1897–1908 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Ferroelectric  Ferroelastic  Domain  switching  Neutron  diffraction Résumé : The performance of ferroelectric ceramics is governed by the ability of domains to switch. A decrease in the switching ability can lead to degradation of the materials and failure of ferroelectric devices. In this work the dynamic properties of domain reorientation are studied. In situ time-of-flight neutron diffraction is used to probe the evolution of ferroelastic domain texture under mechanical cyclic loading in bulk lead zirconate titanate ceramics. The high sensitivity of neutron diffraction to lattice strain is exploited to precisely analyze the change of domain texture and strain through a full-pattern Rietveld method. These results are then used to construct a viscoelastic model, which explains the correlation between macroscopic phenomena (i.e. creep and recovered deformation) and microscopic dynamic behavior (i.e. ferroelastic switching, lattice strain). DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008052 [article] Dynamic processes of domain switching in lead zirconate titanate under cyclic mechanical loading by in situ neutron diffraction [texte imprimé] / Soodkhet Pojprapai(Imlao), Auteur ; Zhenhua Luo, Auteur ; Bjørn Clausen, Auteur . - 2011 . - pp. 1897–1908. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 1897–1908 Mots-clés : Ferroelectric  Ferroelastic  Domain  switching  Neutron  diffraction Résumé : The performance of ferroelectric ceramics is governed by the ability of domains to switch. A decrease in the switching ability can lead to degradation of the materials and failure of ferroelectric devices. In this work the dynamic properties of domain reorientation are studied. In situ time-of-flight neutron diffraction is used to probe the evolution of ferroelastic domain texture under mechanical cyclic loading in bulk lead zirconate titanate ceramics. The high sensitivity of neutron diffraction to lattice strain is exploited to precisely analyze the change of domain texture and strain through a full-pattern Rietveld method. These results are then used to construct a viscoelastic model, which explains the correlation between macroscopic phenomena (i.e. creep and recovered deformation) and microscopic dynamic behavior (i.e. ferroelastic switching, lattice strain). DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008052