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Characterization of a Functionally Gradient Ceramic Based on CaZrO3 – MgO

2018Conference object Open access
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dc.contributor.authorBabo, Débora Rafaela Telha de
dc.contributor.authorNunes-Pereira, João
dc.contributor.authorSilva, Pedro D.
dc.contributor.authorPena, Pilar
dc.contributor.authorBaudin, Carmen
dc.contributor.authorPereira Silva, A
dc.date.accessioned2024-04-05T11:14:38Z
dc.date.available2024-04-05T11:14:38Z
dc.date.issued2018
dc.description.abstractIn the case, where the structure is exposed to severe conditions of operation, such as high strength, wear and high-temperature gradients (e.g. engine components, insulation system, thermal barrier and thermal shield) must be applied. In this work, it was developed and characterized a functional gradient ceramic coating. A ceramic composite based in CaZrO3 – MgO was used in order to design a material with successive layers of molar composition 2:3, 1:1 and 1:3 of CaZrO3:MgO, respectively. A dense material was obtained by sintering assisted reaction (Figure 1). Thermal conductivity at room temperature, hardness, fracture toughness, surface energy, and microstructure were characterized.The results show for monolithic specimens of 2:3 CZ, 1:1 CZ and 1:3 CZ a H of 9,9 GPa, 9,8 GPa and 10,1GPa; a Kc of 1,6 MPa.m1/2, 1,7 MPa.m1/ and 2,1 MPa.m1/2; a k of 0,59 W/mK; 0,76 W/mK and 0,79 W/mK; and a surface energy (SE) of 43,27 mN/m, 51,39 mN/m and 46,55 mN/m, respectively. The functional gradient ceramic shows a H of 10,7 GPa, a Kc of 1,97 MPa.m1/2; a k of 0,82 W/mK and SE of 53,98 mN/m. The individual composition and the functional gradient ceramic show a similar relative density of 4,3 g/cm3 and a porosity of 0,2%. This design methodology has the advantage of allowing the properties of the same material to suit different substrates.pt_PT
dc.description.sponsorshipThis work has been supported by the project Centro-01-0145-FEDER-000017 - EMaDeS - Energy, Materials and Sustainable Development, co-financed by the Portugal 2020 Program (PT 2020), within the Regional Operational Program of the Center (CENTRO 2020) and the European Union through the European Regional Development Fund (ERDF).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/14361
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/pt_PT
dc.subjectFunctionally Gradient Ceramicpt_PT
dc.subjectCeramic multiphasic compositespt_PT
dc.subjectCalcium zirconate (CaZrO3)pt_PT
dc.subjectMagnesium oxide (MgO)pt_PT
dc.subjectCeramic coatingpt_PT
dc.subjectThermal conductivitypt_PT
dc.subjectMicrostructurept_PT
dc.subjectVickers hardnesspt_PT
dc.subjectSurface energypt_PT
dc.subjectFracture toughnesspt_PT
dc.subjectPorositypt_PT
dc.titleCharacterization of a Functionally Gradient Ceramic Based on CaZrO3 – MgOpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceBarcelona, Espanhapt_PT
oaire.citation.endPage184pt_PT
oaire.citation.startPage184pt_PT
oaire.citation.titleV Congreso Hispano-Luso de Cerámica y Vidriopt_PT
person.familyNameNunes-Pereira
person.familyNameSilva
person.familyNamePena
person.familyNameBaudin
person.familyNameSilva
person.givenNameJoão
person.givenNamePedro
person.givenNamePilar
person.givenNameCarmen
person.givenNameAbilio
person.identifier.ciencia-id6D16-6F7E-64F0
person.identifier.ciencia-id3C14-B985-13A1
person.identifier.ciencia-idD314-9C94-0B0F
person.identifier.orcid0000-0002-6024-8716
person.identifier.orcid0000-0003-2204-3397
person.identifier.orcid0000-0001-6312-7373
person.identifier.orcid0000-0002-9037-0931
person.identifier.orcid0000-0002-2100-7223
person.identifier.ridAAD-6349-2020
person.identifier.ridA-6638-2016
person.identifier.ridF-4829-2019
person.identifier.ridO-1474-2013
person.identifier.scopus-author-id57200519831
person.identifier.scopus-author-id7203088999
person.identifier.scopus-author-id7004962121
person.identifier.scopus-author-id7005270843
person.identifier.scopus-author-id8540933900
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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relation.isAuthorOfPublication483bd890-f402-4ce4-b740-b37febcba37f
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