@Article{CapoteOlayTrav:2014:AdAmHy,
author = "Capote, G. and Olaya, J. J. and Trava-Airoldi, Vladimir Jesus",
affiliation = "{Universidad Nacional de Colombia} and {Universidad Nacional de
Colombia} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Adherent amorphous hydrogenated carbon coatings on steel surfaces
deposited by enhanced asymmetrical bipolar pulsed-DC PECVD method
and hexane as precursor",
journal = "Surface and Coatings Technology",
year = "2014",
volume = "251",
pages = "276--282",
keywords = "Adhesion, Amorphous carbon, Amorphous silicon, Bias voltage,
Carbon films, Chemical vapor deposition, Coatings, Corrosion,
Corrosion resistance, Film growth, Hardness, Hexane,
Hydrogenation, Ion implantation, Mechanical properties,
Microstructure, Phase interfaces, Plasma enhanced chemical vapor
deposition, Sodium chloride, Substrates, Tribology, Vapors,
Amorphous hydrogenated carbon, Amorphous hydrogenated carbon
(a-C:H) films, Electrochemical potentiodynamic polarizations,
Mechanical and tribological properties, Nanoindentation
experiments, Plasma enhanced chemical vapor deposition systems,
Raman scattering spectroscopy, Tribological properties, Amorphous
films.",
abstract = "In order to overcome the high residual stress and low adherence of
amorphous hydrogenated carbon (a-C:H) films on steel substrates, a
thin amorphous silicon interlayer was deposited as an interface
between the substrate and a-C:H films produced by using hexane
vapor as a precursor gas. Amorphous silicon interlayer and a-C:H
films were grown by employing a modified and asymmetrical bipolar
pulsed-DC plasma enhanced chemical vapor deposition (PECVD)
system, using silane and hexane atmospheres, respectively. The
a-C:H films were analyzed according to their microstructure, and
mechanical and tribological properties as a function of self-bias
voltage. The chemical composition and hydrogen content of the
a-C:H films were estimated by means of Raman scattering
spectroscopy. The total stress was evaluated through the
measurement of the substrate curvature, using a profilometer,
while nanoindentation experiments helped determine the films'
hardness. The friction coefficient and critical load were
determined by using a tribometer. The corrosion resistance was
evaluated by electrochemical potentiodynamic polarization
techniques on a 3% solution of sodium chloride (NaCl). The results
showed that the use of the amorphous silicon interlayer, deposited
by low energy ion implantation, improved the a-C:H film deposition
onto steel substrates, producing good adhesion, low compressive
stress, and a high hardness. The composition, the microstructure,
and the mechanical and tribological properties of the films were
strongly dependent on the self-bias voltages. These results
suggest that a combination of a modified pulsed-DC PECVD system
and hexane as a precursor gas for growing a-C:H films may
represent a good and new alternative for coating scaling for
mechanical and tribological applications.",
doi = "10.1016/j.surfcoat.2014.04.037",
url = "http://dx.doi.org/10.1016/j.surfcoat.2014.04.037",
issn = "0257-8972",
label = "scopus 2014-11 CapoteOlayTrav:2014:AdAmHy",
language = "en",
targetfile = "Capote_Adherent.pdf",
urlaccessdate = "27 abr. 2024"
}