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dc.creatorBučevac, Dušan
dc.creatorOmerasević, Mia
dc.creatorEgelja, Adela
dc.creatorRadovanović, Željko
dc.creatorKljajević, Ljiljana M.
dc.creatorNenadović, Snežana S.
dc.creatorKrstić, Vladimir
dc.date.accessioned2021-03-10T14:24:27Z
dc.date.available2021-03-10T14:24:27Z
dc.date.issued2020
dc.identifier.issn0272-8842
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/4525
dc.description.abstractComprehensive study on effect of YAG amount on densification, creep resistance and room-temperature mechanical properties of Al2O3-YAG composite pressureless sintered at 1600 degrees C was conducted. The main goal was to optimize the amount of YAG in order to fabricate a composite with improved creep resistance and sufficiently good room-temperature mechanical properties. The composite was made by mixing a commercially available Al2O3 powder with fine YAG powder obtained by glycine-nitrate combustion synthesis starting from aluminum nitrate and yttrium nitrate. Increased driving force for sintering of fine YAG powder allowed fabrication of dense Al2O3-YAG composite with up to 30 vol% YAG. The presence of YAG was found to be very effective in improving creep resistance of Al2O3-YAG composite. Large Y3+ ions blocked diffusion along Al2O3 grain boundaries, reduced diffusivity and therefore enhanced creep resistance of Al2O3-YAG composite which continuously increased as the YAG amount increased. The presence of YAG was also found to improve mechanical properties such as hardness and elastic modulus. The improvement of these properties was ascribed to increased density of Al(2)O(3)YAG composites owing to high sintering activity of YAG powder. While fracture strength of the composite can be as high as that of monolithic Al2O3, fracture toughness of composite decreased continuously as the YAG content increased. The decrease was ascribed to transgranular fracture of both YAG and Al2O3 grains in samples containing larger amounts of YAG. The proper balance between fracture toughness and creep resistance was found in composite containing 18 vol% YAG which had considerably improved creep resistance accompanied by a relatively small decrease in fracture toughness.en
dc.publisherElsevier Sci Ltd, Oxford
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45012/RS//
dc.rightsrestrictedAccess
dc.sourceCeramics International
dc.subjectSinteringen
dc.subjectCompositesen
dc.subjectMechanical propertiesen
dc.subjectAl2O3-YAGen
dc.titleEffect of YAG content on creep resistance and mechanical properties of Al2O3-YAG compositeen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage16007
dc.citation.issue10
dc.citation.other46(10): 15998-16007
dc.citation.rankaM21
dc.citation.spage15998
dc.citation.volume46
dc.identifier.doi10.1016/j.ceramint.2020.03.150
dc.identifier.scopus2-s2.0-85081653034
dc.identifier.wos000533512000032
dc.type.versionpublishedVersion


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Приказ основних података о документу