Improved ball milling method for the synthesis of nanocrystalline TiFe compound ready to absorb hydrogen

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dc.contributor.authorVEGA, L.E.R.pt_BR
dc.contributor.authorLEIVA, D.R.pt_BR
dc.contributor.authorLEAL NETO, R.M.pt_BR
dc.contributor.authorSILVA, W.B.pt_BR
dc.contributor.authorSILVA, R.A.pt_BR
dc.contributor.authorISHIKAWA, T.T.pt_BR
dc.contributor.authorKIMINAMI, C.S.pt_BR
dc.contributor.authorBOTTA, W.J.pt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2020-04-07T14:03:18Z
dc.date.available2020-04-07T14:03:18Z
dc.date.issued2020pt_BR
dc.description.abstractIn this study, we propose a method to produce nanocrystalline TiFe powder by high-energy ball milling, in order to avoid the common sticking problem of the material to the milling tools, assuring a material prompt to absorb hydrogen as well. The method consists of making a preliminary milling operation with the elemental powders (50:50 stoichiometric ratio) to form a strong adhered layer of the milled material on the surfaces of the vial and balls. The main milling operation is then performed with a new powder charge (same composition as before), but now adding a process control agent (stearic acid). Various processing times - 2, 6, 10 and 20 h - were used in the milling experiments. Nanocrystalline TiFe was synthesized in this way with low oxygen contamination, full yields for milling times of 6 h or over, requiring no heat treatments for the first hydrogen absorption. Hydrogen storage capacity of 1.0 wt% at room temperature under 20 bar was attained by the sample milled for 6 h. Kinetic data from samples milled for 2 h and 6 h agreed with Jander model for the rate limiting step of the hydriding reaction, which is based on diffusion with constant interface area.pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipIDFAPESP: 13/05987-8pt_BR
dc.format.extent2084-2093pt_BR
dc.identifier.citationVEGA, L.E.R.; LEIVA, D.R.; LEAL NETO, R.M.; SILVA, W.B.; SILVA, R.A.; ISHIKAWA, T.T.; KIMINAMI, C.S.; BOTTA, W.J. Improved ball milling method for the synthesis of nanocrystalline TiFe compound ready to absorb hydrogen. <b>International Journal of Hydrogen Energy</b>, v. 45, n. 3, p. 2084-2093, 2020. DOI: <a href="https://dx.doi.org/10.1016/j.ijhydene.2019.11.035">10.1016/j.ijhydene.2019.11.035</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31105.
dc.identifier.doi10.1016/j.ijhydene.2019.11.035pt_BR
dc.identifier.fasciculo3pt_BR
dc.identifier.issn0360-3199pt_BR
dc.identifier.orcid0000-0001-5104-7392pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-5104-7392
dc.identifier.percentilfi69.78pt_BR
dc.identifier.percentilfiCiteScore88.50
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/31105
dc.identifier.vol45pt_BR
dc.relation.ispartofInternational Journal of Hydrogen Energypt_BR
dc.rightsopenAccesspt_BR
dc.subjectintermetallic compounds
dc.subjectalloys
dc.subjectmechanical properties
dc.subjectnanocrystals
dc.subjectmilling
dc.subjecthydrogen storage
dc.subjecthydrides
dc.subjectactivation analysis
dc.titleImproved ball milling method for the synthesis of nanocrystalline TiFe compound ready to absorb hydrogenpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorRICARDO MENDES LEAL NETO
ipen.codigoautor520
ipen.contributor.ipenauthorRICARDO MENDES LEAL NETO
ipen.date.recebimento20-04
ipen.identifier.fi5.816pt_BR
ipen.identifier.fiCiteScore9.0
ipen.identifier.ipendoc26666pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.identifier.ods7
ipen.range.fi4.500 - 5.999
ipen.range.percentilfi50.00 - 74.99
ipen.type.genreArtigo
relation.isAuthorOfPublicationb5e83d03-1f9c-4e57-8e02-628a903c95f8
relation.isAuthorOfPublication.latestForDiscoveryb5e83d03-1f9c-4e57-8e02-628a903c95f8
sigepi.autor.atividadeLEAL NETO, R.M.:520:730:Npt_BR
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