Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/337341
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampBergamo, Edmara Tatiely Pedroso-
dc.typeArtigopt_BR
dc.titleNanomechanical and microstructural characterization of a zirconia-toughened alumina composite after agingpt_BR
dc.contributor.authorLopes, A. C. O.-
dc.contributor.authorCoelho, P. G.-
dc.contributor.authorWitek, L.-
dc.contributor.authorBenalcazar Jalkh, E. B.-
dc.contributor.authorGenova, L. A.-
dc.contributor.authorMonteiro, K. N.-
dc.contributor.authorCesar, P. F.-
dc.contributor.authorLisboa Filho, P. N.-
dc.contributor.authorBergamo, E. T. P.-
dc.contributor.authorRamalho, I. S.-
dc.contributor.authorBonfante, E. A.-
dc.subjectMicroestruturapt_BR
dc.subject.otherlanguageMicrostructurept_BR
dc.description.abstractThis study's objective was to mechanically characterize and validate the synthesis method of a polycrystalline composite comprised of 80% alumina reinforced with 20% translucent zirconia (zirconia-toughened alumina, ZTA) and compare to an experimental translucent zirconia. Experimental ZTA (ZTA ZPEX 80/20) and translucent Y-TZP (ZPEX) green-state disc-shaped specimens were obtained via uniaxial/isostatic ceramic powder pressing technique. The discs were sintered using a predefined protocol after both sides of the discs were polished. The specimens were subjected to nanoindentation testing to acquire their elastic modulus (E) and hardness (H) before and after a simulated low temperature degradation (LTD) challenge. Subsequently, the fabricated discs had their 3D surface topographical (Sa/Sq) parameters assessed via interferometry before and after exposure to a simulated LTD aging protocol. The specimens were evaluated using X-ray diffraction (XRD) to assess the tetragonal-monoclinic phase transformation and via scanning electron microscopy (SEM) to evaluate the homogeneity of the surfaces and distribution of the grains. The apparent density was measured using Archimedes' principle. All of the data were statistically evaluated through repeated measures ANOVA following post-hoc comparisons using the Tukey test (p < 0.05). The XRD patterns indicated a higher increase in the monoclinic peak for ZPEX compared to ZTA ZPEX 80/20 aged. LTD aging did not have an effect on the surface roughness (Sa/Sq) for both groups (p > 0.05). A significant decrease in the E values after the aging protocol was observed for both groups (p < 0.01). While ZTA ZPEX 80/ 20 did not show statistically significant differences in the hardness values after the aging protocol (p = 0.36), ZPEX demonstrated a significant decrease in the H values (p = 0.03). For ZTA ZPEX 80/20, simulated LTD aging did not affect the tested properties, except for the E values. Although artificial aging did not affect the surface roughness of ZPEX, the E and H values significantly decreased after agingpt_BR
dc.relation.ispartofCeramics internationalpt_BR
dc.relation.ispartofabbreviationCeram. int.pt_BR
dc.publisher.cityOxfordpt_BR
dc.publisher.countryReino Unidopt_BR
dc.publisherElsevierpt_BR
dc.date.issued2019-
dc.date.monthofcirculationMaypt_BR
dc.language.isoengpt_BR
dc.description.volume45pt_BR
dc.description.issuenumber7pt_BR
dc.description.firstpage8840pt_BR
dc.description.lastpage8846pt_BR
dc.rightsFechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0272-8842pt_BR
dc.identifier.eissn1873-3956pt_BR
dc.identifier.doi10.1016/j.ceramint.2019.01.211pt_BR
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0272884219302305pt_BR
dc.description.sponsorshipCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQpt_BR
dc.description.sponsorshipFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPpt_BR
dc.description.sponsorshipCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESpt_BR
dc.description.sponsordocumentnumber304589/2017-9; 434487/2018-0pt_BR
dc.description.sponsordocumentnumbernão tempt_BR
dc.description.sponsordocumentnumber2012/19078-7; EMU 2016/18818-8; 2016/17793-1; 2017/19362-0; 2018/03072-6pt_BR
dc.date.available2020-03-24T20:55:16Z-
dc.date.accessioned2020-03-24T20:55:16Z-
dc.description.provenanceSubmitted by Mariana Aparecida Azevedo (mary1@unicamp.br) on 2020-03-24T20:55:16Z No. of bitstreams: 0. Added 1 bitstream(s) on 2020-07-20T14:17:20Z : No. of bitstreams: 1 000463688500098.pdf: 3376463 bytes, checksum: 707c48a85b6ce996e622d70a0ed4e2cb (MD5)en
dc.description.provenanceMade available in DSpace on 2020-03-24T20:55:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2019en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/337341-
dc.contributor.departmentsem informaçãopt_BR
dc.contributor.unidadeFaculdade de Odontologia de Piracicabapt_BR
dc.subject.keywordCompositespt_BR
dc.subject.keywordZrO2-A1(2)O(3)pt_BR
dc.subject.keywordMechanical propertiespt_BR
dc.identifier.source000463688500098pt_BR
dc.creator.orcidsem informaçãopt_BR
dc.type.formArtigopt_BR
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