Mechanical performance of a hybrid zirconia developed through hydrothermal treatment and Room-Temperature Atomic Layer Deposition (RT-ALD)

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dc.contributor.authorBastos-Bitencourt, Natália Almeida
dc.contributor.authorSoares Bombonatti, Juliana Fraga
dc.contributor.authorBitencourt, Sandro Basso [UNESP]
dc.contributor.authorHatton, Benjamin D.
dc.contributor.authorDe Souza, Grace Mendonca
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversity of Toronto
dc.date.accessioned2022-04-29T08:32:11Z
dc.date.available2022-04-29T08:32:11Z
dc.date.issued2021-11-01
dc.description.abstractObjective: A silica-based nanofilm has been successfully deposited via Room-Temperature Atomic Layer Deposition (RT-ALD) on the surface of a glass. The purpose of this study was to evaluate the mechanical performance of a hybrid interface created between yttria-stabilized zirconia (Y-PSZ) transformed layer and silica-based nanofilm via RT-ALD. Material and methods: Fully-sintered Y-PSZ (14 × 4.0 × 1.5 mm) specimens in different translucencies (MO, MT, LT; IPS e.max Zircad, Ivoclar Vivadent) were distributed in 5 groups: control (C - no treatment); hydrothermal treatment (HT- 15h, 134°C, 2 bar); alumina blasting (B - 50 μm Al2O3); RT-ALD silica deposition (S); HT followed by silica deposition (HTS). RT-ALD cycles consisted of the sequential exposure of specimens to tetramethoxysilane orthosilicate (TMOS - 60s) and ammonium hydroxide (NH4OH - 10 min) vapors in 40 cycles. Mechanical performance was analyzed by flexural strength (FS) (n = 10) and fatigue failure load (staircase method; n = 20) tests. Surface hardness (H) and Young's modulus (YM) were analyzed by nanoindentation. For surface chemical and topographical characterization, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were performed. Data from surface H, YM, FS, and fatigue limit (FL) were analyzed by two-way analysis of variance (ANOVA). Results: The interaction between material and treatment had a significant effect on FS (p < 0.001). The FS values ranged from 436.23 MPa to 856.65 MPa. HT resulted in the highest FS (856.65 MPa) for LT and the lowest FS (436.23 MPa) for MO zirconia. For all materials, S and B treatments resulted in similar FS values (p > 0.410). S did not affect FL when compared to the C group (p > 0.277) for any material investigated. HTS resulted in higher FL than S for LT and MO materials (p < 0.001). Surface hardness and modulus were similar between control and S-treated specimens for all materials analyzed. XPS analysis showed homogeneous silica content after 20 and 40 RT-ALD cycles, and SEM did not show significant changes in surface morphology between C and S-treated specimens. Conclusion: RT-ALD resulted in effective silica deposition without any deleterious effect on zirconia-based materials mechanical properties. Alumina blasting promoted higher alteration on surface topography. HT prior to S resulted in superior FL (for MO and MT) and flexural strength (MO) for some of the materials investigated.en
dc.description.affiliationDepartment of Operative Dentistry Endodontics and Dental Materials Bauru School of Dentistry University of Sao Paulo
dc.description.affiliationDepartment of Dental Materials and Prosthodontics Sao Paulo State University (UNESP) School of Dentistry Araçatuba
dc.description.affiliationMaterials Science and Engineering University of Toronto
dc.description.affiliationFaculty of Dentistry University of Toronto
dc.description.affiliationUnespDepartment of Dental Materials and Prosthodontics Sao Paulo State University (UNESP) School of Dentistry Araçatuba
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdNatural Sciences and Engineering Research Council of Canada: 2018–04979
dc.description.sponsorshipIdCNPq: 42082/2018-0
dc.description.sponsorshipIdCAPES: 88887.371176/2019-00
dc.identifierhttp://dx.doi.org/10.1016/j.jmbbm.2021.104783
dc.identifier.citationJournal of the Mechanical Behavior of Biomedical Materials, v. 123.
dc.identifier.doi10.1016/j.jmbbm.2021.104783
dc.identifier.issn1878-0180
dc.identifier.issn1751-6161
dc.identifier.scopus2-s2.0-85113227386
dc.identifier.urihttp://hdl.handle.net/11449/229379
dc.language.isoeng
dc.relation.ispartofJournal of the Mechanical Behavior of Biomedical Materials
dc.sourceScopus
dc.subjectDental ceramics
dc.subjectFlexural strength
dc.subjectHybrid layer
dc.subjectNanoindentation
dc.subjectPhase transformation
dc.titleMechanical performance of a hybrid zirconia developed through hydrothermal treatment and Room-Temperature Atomic Layer Deposition (RT-ALD)en
dc.typeArtigo

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