Transparent magnesium aluminate spinel: Effect of critical temperature in two-stage spark plasma sintering

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dc.contributor.authorTalimian, Alics
dc.contributor.authorPouchlý, Václavcs
dc.contributor.authorEl-Maghraby, H.F.cs
dc.contributor.authorMaca, Karelcs
dc.contributor.authorGalusek, Dušancs
dc.coverage.issue6cs
dc.coverage.volume40cs
dc.date.accessioned2020-08-04T11:04:20Z
dc.date.available2020-08-04T11:04:20Z
dc.date.issued2020-06-01cs
dc.description.abstractThe discolouration of magnesium aluminate spinet caused by carbon contamination is a main drawback of fabricating transparent bodies by spark plasma sintering (SPS). In this study, a two-stage heating rate profile was used to produce transparent MgAl2O4 without using sintering aids by SPS at 1250 degrees C. The effect of critical temperature (Tc), at which the heating rate is decreased, on transparency and carbon contamination was investigated: higher critical temperature resulted in higher contamination. Non-uniform densification indicated that fast heating results in a hot-zone formation in the centre of sintered pellets; the higher temperature of centre favoured reaction of graphite die with spinel and formation of disordered carbon structures in residual pores.en
dc.formattextcs
dc.format.extent2417-2425cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJournal of the European Ceramic Society. 2020, vol. 40, issue 6, p. 2417-2425.en
dc.identifier.doi10.1016/j.jeurceramsoc.2020.02.012cs
dc.identifier.issn0955-2219cs
dc.identifier.other163795cs
dc.identifier.urihttp://hdl.handle.net/11012/187003
dc.language.isoencs
dc.publisherELSEVIER SCI LTDcs
dc.relation.ispartofJournal of the European Ceramic Societycs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0955221920300923?via%3Dihubcs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0955-2219/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectMagnesium aluminate spinelen
dc.subjectSpark plasma sinteringen
dc.subjectCarbon contaminationen
dc.subjectOptical propertiesen
dc.titleTransparent magnesium aluminate spinel: Effect of critical temperature in two-stage spark plasma sinteringen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-163795en
sync.item.dbtypeVAVen
sync.item.insts2020.08.04 13:04:20en
sync.item.modts2020.08.04 12:45:37en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Inovační technologie v keramicecs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav materiálových věd a inženýrstvícs
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