%0 Journal Article
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@nexthigherunit 8JMKD3MGPCW/3EUUDJE
%3 1742-6596_370_1_012022.pdf
%X In 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 ìs, 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 were investigated. Film thickness increased from 0.3 to 0.5 ìm when p was increased from 2.7 to 16.5 Pa. Generally, the films were slightly hydrophilic, with contact angles of around 84°, 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 micro) would lead to a significant reduction in wear and hence to significant economy in diverse industrial applications.
%T Lubricating coating prepared by PIIID on a forming tool
%@electronicmailaddress
%@electronicmailaddress lucia.vieira@univap.br
%@secondarytype PRE PI
%K Lubricating coating, a-C:H films, hybrid plasma immersion ion implantation and deposition.
%@archivingpolicy denypublisher denyfinaldraft12
%@usergroup administrator
%@usergroup lattes
%@usergroup marciana
%@group
%@group ETE-ETE-INPE-MCTI-GOV-BR
%@e-mailaddress lucia.vieira@univap.br
%@secondarykey INPE--PRE/
%@secondarymark C_ASTRONOMIA_/_FÍSICA B4_CIÊNCIA_DA_COMPUTAÇÃO C_CIÊNCIAS_BIOLÓGICAS_II C_ENGENHARIAS_I B3_ENGENHARIAS_II C_ENGENHARIAS_III B1_INTERDISCIPLINAR B3_MATERIAIS C_QUÍMICA
%F lattes: 4359261479122193 6 MartinattiMCRCSDDSR:2012:LuCoPr
%@issn 1742-6588
%2 dpi.inpe.br/plutao/2012/11.28.15.12.44
%@affiliation
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Journal of Physics: Conference Series
%@versiontype publisher
%P 012022
%4 dpi.inpe.br/plutao/2012/11.28.15.12.43
%@documentstage not transferred
%D 2012
%V 370
%@doi 10.1088/1742-6596/370/1/012022
%A Martinatti, José Fernando,
%A Santos, Lúcia Vieira,
%A Durrant, S F,
%A Cruz, N C,
%A Rangel, E C,
%@dissemination WEBSCI; PORTALCAPES; COMPENDEX.
%@area ETES