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dc.contributor.authorMelk, Latifa
dc.contributor.authorRoa Rovira, Joan Josep
dc.contributor.authorGarcía Marro, Fernando
dc.contributor.authorAntti, Marta-Lena
dc.contributor.authorMilsom, Ben
dc.contributor.authorReece, Michel
dc.contributor.authorAnglada Gomila, Marcos Juan
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.identifier.citationMelk, L., Roa, J.J., Marro, F.G., Antti, M., Milsom, B., Reece, M., Anglada, M. Nanoindentation and fracture toughness of nanostructured zirconia/multi-walled carbon nanotube composites. "Ceramics international", 01 Març 2015, núm. 2, p. 2453-2461.
dc.description.abstractMulti-walled carbon nanotubes (MWCNTs)/3 mol% yttria-doped tetragonal zirconia (3Y-TZP) composites were produced using spark plasma sintering (SPS) with MWCNT content ranging within 0-2 wt%. In the present paper, it was shown that the addition of MWCNTs results in a refinement of the composites microstructure. Moreover, nanoindentation tests were performed in order to monitor the change in elastic modulus and hardness with MWCNT content and it was found that both properties decrease with the addition of MWCNT content. A novel method was used to measure the true fracture toughness of the composites by producing a shallow surface sharp notch machined by ultra-short pulsed laser ablation on the surface of beam specimens. The true fracture toughness obtained on this laser machined single edge V-notch beam (SEVNB) specimens tested in four point bending was compared to the indentation fracture toughness measured using a Vickers indenter. It was found that the indentation fracture toughness increases with increasing MWCNT content, while the true fracture toughness determined with SEVNB was practically independent of the composition. Finally, it was concluded that the increase in the resistance to indentation cracking of the composites with respect to 3Y-TZP matrix cannot be associated to higher true fracture toughness. The results were discussed in terms of transformation toughening, damage induced in front of the notch tip, microstructure of the composites, and fracture toughness of 3Y-TZP. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
dc.format.extent9 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshCarbon nanotubes
dc.subject.otherMechanical properties
dc.subject.otherCeramic matrix composites (CMCs)
dc.subject.otherCarbon nanotubes
dc.subject.otherFracture toughness
dc.subject.otherShort pulse laser machining
dc.titleNanoindentation and fracture toughness of nanostructured zirconia/multi-walled carbon nanotube composites
dc.subject.lemacNanocompòsits (Materials)
dc.contributor.groupUniversitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author’s final draft)
local.citation.authorMelk, L.; Roa, J.J.; Marro, F.G.; Antti, M.; Milsom, B.; Reece, M.; Anglada, M.
local.citation.publicationNameCeramics international

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