Influence of the radial spacing between cathodes on the surface composition of iron samples sintered by hollow cathode electric discharge

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dc.contributor.author Brunatto, S.f. [UNIFESP]
dc.contributor.author Kühn, I.
dc.contributor.author Muzart, J.l.r.
dc.date.accessioned 2015-06-14T13:29:30Z
dc.date.available 2015-06-14T13:29:30Z
dc.date.issued 2001-10-01
dc.identifier http://dx.doi.org/10.1590/S1516-14392001000400005
dc.identifier.citation Materials Research. ABM, ABC, ABPol, v. 4, n. 4, p. 245-250, 2001.
dc.identifier.issn 1516-1439
dc.identifier.uri http://repositorio.unifesp.br/handle/11600/1249
dc.description.abstract The present work reports an investigation of the influence of the radial spacing between cathodes on the iron sintering process by hollow cathode electrical discharge, with surface enrichment of the alloying elements Cr and Ni. Pressed cylindrical samples of 9.5 mm diameter and density of 7.0 ± 0.1 g/cm³ were prepared by compaction of Ancorsteel 1000C iron powder. These samples, constituting the central cathode, were positioned concentrically in the interior of an external cathode machined from a tube of stainless steel AISI 310 (containing: 25% Cr, 16% Ni, 1.5% Mn, 1.5% Si, 0.03% C and the remainder Fe). Sintering was done at 1150 °C, for 120 min, utilizing radial spacings between the central and hollow cathodes of 3, 6 and 9 mm and a gas mixture of 80% Ar and 20% H2, with a flow rate of 5 cm³/s at a pressure of 3 Torr. The electric discharge was generated using a pulsed voltage power source, with a period of 200 mus. The radial spacing had only a slight influence on the quantity of atoms of alloying elements deposited and diffused on the surface of the sample. Analysis with a microprobe showed the presence of chrome (up to 4.0%) and nickel (up to 3.0%, in at. %) at the surface of the samples. This surface enrichment can be attributed to the mechanism of sputtering of the metallic atoms present in the external cathode, with the deposition of these elements on the sample surface and consequent diffusion within the sample. en
dc.format.extent 245-250
dc.language.iso eng
dc.publisher ABM, ABC, ABPol
dc.relation.ispartof Materials Research
dc.rights Acesso aberto
dc.subject hollow cathode discharge en
dc.subject plasma sintering en
dc.subject sintered iron en
dc.subject surface deposition of alloying elements en
dc.title Influence of the radial spacing between cathodes on the surface composition of iron samples sintered by hollow cathode electric discharge en
dc.type Artigo
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.contributor.institution Universidade Federal de Santa Catarina Department of Mechanical Engineering
dc.description.affiliation Universidade Federal de São Paulo (UNIFESP) Department of Mechanical Engineering
dc.description.affiliation Universidade Federal de Santa Catarina Department of Mechanical Engineering
dc.description.affiliationUnifesp UNIFESP, Department of Mechanical Engineering
dc.identifier.file S1516-14392001000400005.pdf
dc.identifier.scielo S1516-14392001000400005
dc.identifier.doi 10.1590/S1516-14392001000400005
dc.description.source SciELO



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