@Article{HincapieCGuTrOlAlCa:2020:InTiTi,
author = "Hincapie C., W. S. and Guti{\'e}rrez B., J. M. and Trava-Airoldi,
Vladimir Jesus and Olaya F., J. J. and Alfonso, E. and Capote,
G.",
affiliation = "{Fundaci{\'o}n Universitaria los Libertadores} and
{Fundaci{\'o}n Universitaria los Libertadores} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidad Nacional
de Colombia} and {Universidad Nacional de Colombia} and
{Universidad Nacional de Colombia}",
title = "Influence of the TixSi and TixSi/a-Si:H interlayers on adherence
of diamond-like carbon coatings",
journal = "Diamond and Related Materials",
year = "2020",
volume = "109",
pages = "e108079",
month = "Nov.",
keywords = "Diamond-like carbon, interlayer, adherence, titanium, silicon.",
abstract = "The effect of two different interlayers on the adherence of DLC
coatings to AISI 316 L stainless steel was studied.
Titanium\‑silicon (TixSi) interlayers and
titanium\‑silicon plus amorphous hydrogenated silicon
(TixSi/a-Si:H) interlayers were deposited. TixSi intermediate
layers were grown with three different thicknesses via the RF
sputtering technique, while a-Si:H interlayers and DLC coatings
were deposited using a DC-PECVD system with an active screen as an
additional cathode. The microstructural characterization of the
titanium\‑silicon interlayer was carried out through the
X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS)
techniques, and chemical analysis was done by means of
energy-dispersive X-ray spectroscopy (EDS), while DLC coatings
were studied with Raman spectroscopy. The degree of adhesion of
the DLC coatings to AISI 316 L stainless steel substrates was
analyzed using critical load measurements and a VDI 3198
indentation test. XRD results showed that new crystalline phases
were not present in the TixSi interlayer. XPS spectra showed a
bond between the Si[sbnd]Fe and the Ti-Fe-O. The adherence results
showed that the DLC coatings deposited using TixSi with 200 nm
thickness exhibited a critical load value of 5 N, while the
coatings with other thicknesses were completely delaminated when
the same load was applied. These results suggested that the low
adhesion of the DLC coating was due to the oxides formed at the
TixSi-DLC interface. For the AISI 316 L/TixSi/a-Si:H/DLC coating,
a critical load of 26 N was determined. The formation of titanium
silicide, iron silicide, and silicon carbide in the interfaces
allowed an increase in the adhesion strength between the
interlayers. The Raman results showed that the DLC coatings
exhibited good microstructural properties and hydrogen contents
around 28 at.%. The DLC coatings also exhibited a hardness of 25
GPa.",
doi = "10.1016/j.diamond.2020.108079",
url = "http://dx.doi.org/10.1016/j.diamond.2020.108079",
issn = "0925-9635",
language = "en",
targetfile = "hincapie_influence.pdf",
urlaccessdate = "24 set. 2024"
}