Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/3786
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dc.contributor.authorDurães, Luísa-
dc.contributor.authorCosta, Benilde F. O.-
dc.contributor.authorSantos, Regina-
dc.contributor.authorCorreia, António-
dc.contributor.authorCampos, José-
dc.contributor.authorPortugal, António-
dc.date.accessioned2008-08-29T15:26:23Z-
dc.date.available2008-08-29T15:26:23Z-
dc.date.issued2007en_US
dc.identifier.citationMaterials Science and Engineering: A. 465:1-2 (2007) 199-210en_US
dc.identifier.urihttp://hdl.handle.net/10316/3786-
dc.description.abstractRadial combustion experiments on Fe2O3/aluminum thermite thin circular samples were conducted. A stoichiometric (Fe2O3 + 2Al) and four over aluminized mixtures were tested. The combustion products were characterized by X-ray diffraction and Mössbauer spectroscopy and the influence of Fe2O3/aluminum ratio on their composition was assessed. The main products were identified as alumina ([alpha]-Al2O3) and iron (Fe). A significant amount of hercynite (FeAl2O4) was detected, decreasing with the aluminum excess in the reactants. Close to the sample/confinement interface, where reaction quenching occurs, a non-stoichiometric alumina (Al2.667O4) was observed, being its XRD intensity correlated to the hercynite amount. Fe3Al intermetallic phase was found in the products of over aluminized mixtures. A reaction mechanism was proposed comprising: (i) Fe2O3 reduction to Fe3O4 and FeO; (ii) Al oxidation to Al2O3; (iii) interaction of the remaining Al with Fe3O4 and FeO with formation of iron-aluminates (hercynite) and iron; (iv) for the over aluminized mixtures, incorporation of Al into the iron-aluminates takes place with the formation of iron and alumina and, in parallel, Al reacts with iron to produce intermetallics.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TXD-4NB2WNM-D/1/330874328b00bbec08b3f511d245aa05en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectThermiteen_US
dc.subjectIron oxide/aluminum reactionen_US
dc.subjectProducts characterizationen_US
dc.subjectX-ray diffractionen_US
dc.subjectMössbauer spectroscopyen_US
dc.subjectReaction mechanismen_US
dc.titleFe2O3/aluminum thermite reaction intermediate and final products characterizationen_US
dc.typearticleen_US
dc.identifier.doi10.1016/j.msea.2007.03.063-
item.grantfulltextopen-
item.fulltextCom Texto completo-
item.openairetypearticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.languageiso639-1en-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.researchunitCIEPQPF – Chemical Process Engineering and Forest Products Research Centre-
crisitem.author.researchunitLAETA - Associated Laboratory for Energy, Transports and Aeronautics-
crisitem.author.researchunitCFE - Centre for Functional Ecology - Science for People & the Planet-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0003-3336-2449-
crisitem.author.orcid0000-0002-6067-3069-
crisitem.author.orcid0000-0003-1748-6345-
Appears in Collections:FCTUC Eng.Química - Artigos em Revistas Internacionais
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