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dc.contributor.authorRoa Rovira, Joan Josep
dc.contributor.authorAboulfadl, Hisham
dc.contributor.authorBarrirero, Jenifer
dc.contributor.authorTurón Viñas, Miquel
dc.contributor.authorMücklich, Frank
dc.contributor.authorAnglada Gomila, Marcos Juan
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.date.accessioned2017-11-03T12:22:02Z
dc.date.issued2017-10-01
dc.identifier.citationRoa, J.J., Aboulfadl, H., Barrirero, J., Turon-Vinas, M., Mücklich, F., Anglada, M. Chemical segregation in a 12Ce-ZrO2/3Y-ZrO2 ceramic composite. "Materials characterization", 1 Octubre 2017, vol. 132, p. 83-91.
dc.identifier.issn1044-5803
dc.identifier.urihttp://hdl.handle.net/2117/109728
dc.description.abstractIn restorative dentistry, 3Y-ZrO2 ceramics are widely accepted for fabricating dental crowns, bridges and implants due to their good biocompatibility, excellent mechanical properties and high aesthetics potential. However, they suffer from low temperature degradation (LTD) in the presence of water species, which generates a loss in their surface mechanical integrity. If ceria is used instead of yttria, as in 12Ce-ZrO2, both higher fracture toughness and resistance to LTD are achieved. The composition of solutes inside the grains and at the grain boundaries is essential for understanding their role in LTD. In the present work, a microstructural study by means of wavelength-dispersive spectroscopy, transmission electron microscopy and atom probe tomography has been conducted by investigating the distribution of elements such as Ce, Y, Al and Zr in the solid solution of zirconia that results from mixing 85 wt% 12Ce-ZrO2 and 15 wt% 3Y-ZrO2 and sintering at two different temperatures, 1450 and 1600 °C. It is shown that the solid solution inside the grains after sintering at any of the two temperatures is not homogenous, being closer to the expected equilibrium concentration when sintering at 1600 °C. Segregation of Ce, Y and Al to the grain boundaries is also analysed by atom probe tomography showing that the segregations are stronger in the specimens sintered at the higher temperature.
dc.format.extent9 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshCeramics
dc.subject.other12Ce-ZrO2/3Y-ZrO2 composite
dc.subject.otherAtom probe tomography
dc.subject.otherChemical composition analysis
dc.subject.otherTEM-electron energy loss spectroscopy
dc.subject.otherTransmission electron microscopy (TEM)
dc.subject.otherWavelength-dispersive spectroscopy
dc.titleChemical segregation in a 12Ce-ZrO2/3Y-ZrO2 ceramic composite
dc.typeArticle
dc.subject.lemacCeràmica
dc.contributor.groupUniversitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials
dc.identifier.doi10.1016/j.matchar.2017.07.045
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S1044580317306630?via%3Dihub
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac21578183
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorRoa, J.J.; Aboulfadl, H.; Barrirero, J.; Turon-Vinas, M.; Mücklich, F.; Anglada, M.
local.citation.publicationNameMaterials characterization
local.citation.volume132
local.citation.startingPage83
local.citation.endingPage91


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