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dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt_BR
dc.identifier.isbnnullpt
dc.typeArtigo de periódicopt_BR
dc.titleNanosized Precipitates In H13 Tool Steel Low Temperature Plasma Nitridingpt_BR
dc.contributor.authorZagonel L.F.pt_BR
dc.contributor.authorBettini J.pt_BR
dc.contributor.authorBasso R.L.O.pt_BR
dc.contributor.authorParedez P.pt_BR
dc.contributor.authorPinto H.pt_BR
dc.contributor.authorLepienski C.M.pt_BR
dc.contributor.authorAlvarez F.pt_BR
unicamp.authorZagonel, L.F., Laboratório Nacional de Nanotecnologia, Centro Nacional de Pesquisa em Energia e Materiais, 13083-970 Campinas, Brazil, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Unicamp, P.O. Box 6165 Campinas, SP, 13083-970, Brazilpt_BR
unicamp.authorBasso, R.L.O., Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Unicamp, P.O. Box 6165 Campinas, SP, 13083-970, Brazilpt_BR
unicamp.authorParedez, P., Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Unicamp, P.O. Box 6165 Campinas, SP, 13083-970, Brazilpt_BR
unicamp.authorAlvarez, F., Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Unicamp, P.O. Box 6165 Campinas, SP, 13083-970, Brazilpt_BR
unicamp.author.externalBettini, J., Laboratório Nacional de Nanotecnologia, Centro Nacional de Pesquisa em Energia e Materiais, 13083-970 Campinas, Brazilpt
unicamp.author.externalPinto, H., Escola de Engenharia de São Carlos, Universidade de São Paulo, 13566-590, São Carlos/SP, Brazilpt
unicamp.author.externalLepienski, C.M., Departamento de Física, Universidade Federal do Paraná, Brazilpt
dc.description.abstractA comprehensive study of pulsed nitriding in AISI H13 tool steel at low temperature (400°C) is reported for several durations. X-ray diffraction results reveal that a nitrogen enriched compound (ε-Fe 2-3N, iron nitride) builds up on the surface within the first process hour despite the low process temperature. Beneath the surface, X-ray Wavelength Dispersive Spectroscopy (WDS) in a Scanning Electron Microscope (SEM) indicates relatively higher nitrogen concentrations (up to 12at.%) within the diffusion layer while microscopic nitrides are not formed and existing carbides are not dissolved. Moreover, in the diffusion layer, nitrogen is found to be dispersed in the matrix and forming nanosized precipitates. The small coherent precipitates are observed by High-Resolution Transmission Electron Microscopy (HR-TEM) while the presence of nitrogen is confirmed by electron energy loss spectroscopy (EELS). Hardness tests show that the material hardness increases linearly with the nitrogen concentration, reaching up to 14.5GPa in the surface while the Young Modulus remains essentially unaffected. Indeed, the original steel microstructure is well preserved even in the nitrogen diffusion layer. Nitrogen profiles show a case depth of about ~43μm after nine hours of nitriding process. These results indicate that pulsed plasma nitriding is highly efficient even at such low temperatures and that at this process temperature it is possible to form thick and hard nitrided layers with satisfactory mechanical properties. This process can be particularly interesting to enhance the surface hardness of tool steels without exposing the workpiece to high temperatures and altering its bulk microstructure. © 2012 Elsevier B.V.en
dc.relation.ispartofSurface and Coatings Technologypt_BR
dc.publishernullpt_BR
dc.date.issued2012pt_BR
dc.identifier.citationSurface And Coatings Technology. , v. 207, n. , p. 72 - 78, 2012.pt_BR
dc.language.isoenpt_BR
dc.description.volume207pt_BR
dc.description.issuenumberpt_BR
dc.description.initialpage72pt_BR
dc.description.lastpage78pt_BR
dc.rightsfechadopt_BR
dc.sourceScopuspt_BR
dc.identifier.issn2578972pt_BR
dc.identifier.doi10.1016/j.surfcoat.2012.05.081pt_BR
dc.identifier.urlhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84865772960&partnerID=40&md5=09e65d4ada01ee5799480080899a0a90pt_BR
dc.date.available2015-06-26T20:29:30Z
dc.date.available2015-11-26T14:26:06Z-
dc.date.accessioned2015-06-26T20:29:30Z
dc.date.accessioned2015-11-26T14:26:06Z-
dc.description.provenanceMade available in DSpace on 2015-06-26T20:29:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2012en
dc.description.provenanceMade available in DSpace on 2015-11-26T14:26:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2012en
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/97054
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/97054-
dc.identifier.idScopus2-s2.0-84865772960pt_BR
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