Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/36053
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dc.contributor.authorPinho, Ruipt_PT
dc.contributor.authorTkach, Alexanderpt_PT
dc.contributor.authorCarpenter, Michael A.pt_PT
dc.contributor.authorNoudem, Jacquespt_PT
dc.contributor.authorCosta, M. Elisabetept_PT
dc.contributor.authorVilarinho, Paula M.pt_PT
dc.date.accessioned2023-01-27T10:05:16Z-
dc.date.available2023-01-27T10:05:16Z-
dc.date.issued2022-09-
dc.identifier.issn1359-6462pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/36053-
dc.description.abstractAn alternative sintering methodology, Spark Plasma Texturing (SPT), allowed us to prepare 98.0% dense lead-free piezoelectric (K1-xNax)NbO3 (KNN) ceramics with a homogenous microstructure of small grains. In this work, Resonant Ultrasound Spectroscopy (RUS) was used to measure bulk, K, and shear, G, moduli of SPT KNN for comparison with conventionally sintered (CS) KNN. SPT fabrication resulted in the highest elastic moduli K = 120.3 GPa (127.7 GPa for 100% density) and G = 45.47 GPa (47.2 GPa for 100% density) ever reported for KNN ceramics. Moreover, by collecting RUS data in situ as a function of temperature, phase transitions at temperatures of 464 and 688 K for CS KNN, and 443 and 643 K for SPT KNN ceramics were determined. Low acoustic loss in the stability field of the cubic phase indicated that the ceramics were mechanically robust, while high loss in the stability fields of the tetragonal and orthorhombic structures demonstrated high mobility of ferroelastic domain walls.pt_PT
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50011%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FCTM-CTM%2F29671%2F2017/PTpt_PT
dc.relationSFRH/BD/12069/2016pt_PT
dc.rightsrestrictedAccesspt_PT
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectLead-free piezoelectricspt_PT
dc.subjectMechanical propertiespt_PT
dc.subjectResonant ultrasound spectroscopy (RUS)pt_PT
dc.subjectAlternative sinteringpt_PT
dc.subjectPhase transitionpt_PT
dc.subject(K1-xNax)NbO3 (KNN)pt_PT
dc.titleElastic moduli of potassium sodium niobate ceramics: Impact of spark plasma texturingpt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.titleScripta Materialiapt_PT
degois.publication.volume218pt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S1359646222003335pt_PT
dc.identifier.doi10.1016/j.scriptamat.2022.114837pt_PT
dc.identifier.essn1872-8456pt_PT
dc.identifier.articlenumber114837pt_PT
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