Lubricating coating prepared by PIIID on a forming tool

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dc.contributor.authorMartinatti, J. F. [UNESP]
dc.contributor.authorSantos, L. V.
dc.contributor.authorDurrant, S. F. [UNESP]
dc.contributor.authorCruz, N. C. [UNESP]
dc.contributor.authorRangel, E. C. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:34:13Z
dc.date.available2014-05-20T15:34:13Z
dc.date.issued2012-01-01
dc.description.abstractIn this work, the performance of a-C: H films produced by the hybrid Plasma Immersion Ion Implantation and Deposition technique as lubricating layers for a steel forming tool has been investigated. Hardened steel (AISI M2, 64 HRC) plates coated with a commercial TiN layer were used as substrates and the films were deposited in a vacuum chamber fitted with two parallel-plate electrodes. The discharges were generated in atmospheres composed of 91% C2H2 and 9% Ar by the application of radiofrequency power (13.56 MHz, 100 W) to the upper electrode while the lower one, also used as the sample holder, was biased with high voltage negative pulses (3.6 kV, 30 mu s, 300 Hz). A deposition time of 840 s was used. The effects of the gas pressure, p, on thickness, molecular structure, wettability, surface morphology and topography, hardness and friction coefficient of the films lwere investigated. Film thickness increased from 0.3 to 0.5 mu m when p was increased from 2.7 to 16.5 Pa. Generally, the films were slightly hydrophilic, with contact angles of around 84 degrees, and the deposition decreased the roughness of the steel. A polymer-like structure was detected in high pressure depositions and an amorphous carbon structure derived from the low pressure procedures. Hardness decreased from 8.2 to 7.0 GPa with increasing p. Improvement in tribological performance was indicated by the fall in the friction coefficient from 0.5 to 0.2 as the deposition pressure was reduced. Operating at the latter value (of mu) would lead to a significant reduction in wear and hence to significant economy in diverse industrial applications.en
dc.description.affiliationUniv Estadual Paulista, BR-18087180 Sorocaba, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, BR-18087180 Sorocaba, SP, Brazil
dc.format.extent10
dc.identifierhttp://dx.doi.org/10.1088/1742-6596/370/1/012022
dc.identifier.citation14th Latin American Workshop on Plasma Physics (lawpp 2011). Bristol: Iop Publishing Ltd, v. 370, p. 10, 2012.
dc.identifier.doi10.1088/1742-6596/370/1/012022
dc.identifier.fileWOS000307752700022.pdf
dc.identifier.issn1742-6588
dc.identifier.orcid0000-0002-4511-3768
dc.identifier.urihttp://hdl.handle.net/11449/42457
dc.identifier.wosWOS:000307752700022
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartof14th Latin American Workshop on Plasma Physics (lawpp 2011)
dc.relation.ispartofsjr0,241
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.titleLubricating coating prepared by PIIID on a forming toolen
dc.typeTrabalho apresentado em evento
dcterms.licensehttp://iopscience.iop.org/1367-2630/page/NJP%20copyright%20statement
dcterms.rightsHolderIop Publishing Ltd
unesp.author.lattes5137862536106636
unesp.author.lattes7157327220048138
unesp.author.lattes6885205382275380
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, Sorocabapt

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Artigos - Engenharia de Controle e Automação - Sorocaba