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Dense and strong ZrO2 ceramics fully densified in <15 min
Stockholm Univeristy, Sweden ; National University of Defence, China.
Stockholm Univeristy, Sweden.
Stockholm Univeristy, Sweden.
Stockholm Univeristy, Sweden.
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2018 (English)In: Advances in Applied Ceramics: Structural, Functional and Bioceramics, ISSN 1743-6753, E-ISSN 1743-6761Article in journal (Refereed) In press
Abstract [en]

Crack-free zirconia ceramics were consolidated via sintering by intense thermal radiation (SITR) approach at 1600–1700°C for 3–5 min. The resulted ceramic bulks can achieve a relative density up to 99.6% with a grain size of 300–1200 nm. Their bending strength, Vickers hardness and indentation toughness values are up to 1244 ± 139 MPa, 13.3 ± 0.3 GPa and 5.5 ± 0.1 MPa m1/2, respectively. Quantitative Raman and XRD analysis show the presence of minor m phase on the natural surface (&lt;7%), fracture surface (&lt;10%) and indentation areas (&lt;15%). It reveals that the SITR method is efficient for rapidly manufacturing zirconia ceramics with desired density, fine grained microstructure and good mechanical properties that are strongly demanded in dental applications. 

Place, publisher, year, edition, pages
2018.
Keywords [en]
Bioceramics, mechanical properties, microstructure, sintering by intense thermal radiation (SITR), spark plasma sintering, toughness, Vickers hardness, Bending strength, Heat radiation, Zirconia, Dental applications, Fine-grained microstructure, Fracture surfaces, Indentation toughness, Natural surface, Relative density, XRD analysis, Zirconia ceramic, Density (specific gravity)
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Natural Sciences
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URN: urn:nbn:se:ri:diva-33764DOI: 10.1080/17436753.2018.1449580Scopus ID: 2-s2.0-85044923351OAI: oai:DiVA.org:ri-33764DiVA, id: diva2:1203944
Available from: 2018-05-04 Created: 2018-05-04 Last updated: 2018-08-08Bibliographically approved

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