Effect of hexane precursor diluted with argon on the adherent diamond-like properties of carbon films on steel surfaces

Capote, Gil; Silva, Guilherme Faria da; Trava-Airoldi, V.J.

doi:10.1016/j.tsf.2015.05.047

Cited by 18 publications

(7 citation statements)

References 39 publications

(57 reference statements)

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“…There was also a tendency for a leftward shift in the band G position, which indicates a decrease in the wavenumber value at which the band reaches its maximum intensity [37]. This shift can also be associated with changes in the carbon structure, such as an increase in disorder or a shift towards sp 2 hybridization [46]. Together, an increased FWHM and a leftward shift in the position of the G band may suggest changes in the carbon structure of the DLC film, potentially indicating a decrease in the diamond-like character and an increase in disorder or defects [36,43,46,47].…”

Section: Results Of the Uv Ageing Testmentioning

confidence: 99%

“…This shift can also be associated with changes in the carbon structure, such as an increase in disorder or a shift towards sp 2 hybridization [46]. Together, an increased FWHM and a leftward shift in the position of the G band may suggest changes in the carbon structure of the DLC film, potentially indicating a decrease in the diamond-like character and an increase in disorder or defects [36,43,46,47]. Figure 4a compares the average width of the FWHM G band and the I D /I G ratio variations among the different film samples studied.…”

Section: Results Of the Uv Ageing Testmentioning

confidence: 99%

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Enhancing UV Radiation Resilience of DLC-Coated Stainless Steel with TiO2: A Dual-Layer Approach

Macário,

da Silveira,

Vieira

et al. 2024

Coatings

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This study presents an innovative dual-layer coating approach integrating titanium dioxide (TiO2) onto diamond-like carbon (DLC)-coated 316L stainless steel. The combination of PECVD-deposited DLC and ALD-deposited TiO2 aims to preserve the inherent tribological properties of DLC while mitigating UV-induced degradation. By leveraging the ability of TiO2 to absorb, reflect, and scatter UV light, this dual-layer strategy significantly enhances the durability of DLC coatings in radiation-prone environments. The effects of accelerated aging through UV exposure on DLC and DLC/TiO2 films were evaluated using an Accelerated Weathering Tester. Comprehensive analyses were conducted to assess the structural and mechanical properties before and after UV exposure, including Raman spectroscopy, profilometry, SEM, EDS, nanoindentation, and tribometry. The results demonstrate that the TiO2 layer effectively mitigates UV-induced damage, preserving the DLC film’s integrity and tribological performance even after 408 h of UV aging. Specifically, the DLC/TiO2 coatings maintained lower roughness, higher hardness, and better adhesion than DLC-only coatings under identical conditions. This research significantly advances protective coating technology by enhancing the durability and performance of DLC films, particularly in aerospace and other demanding industries where exposure to UV radiation is a critical concern.

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Section: Results Of the Uv Ageing Testmentioning

confidence: 99%

Section: Results Of the Uv Ageing Testmentioning

confidence: 99%

Enhancing UV Radiation Resilience of DLC-Coated Stainless Steel with TiO2: A Dual-Layer Approach

Macário,

da Silveira,

Vieira

et al. 2024

Coatings

View full text Add to dashboard Cite

show abstract

“…The intensity of the acoustic emission (AE) signal was continuously recorded during scratching, with the critical load for sustained cracking of the coating specified as L 1 and the critical load for substrate exposure as L 2 . The L 2 is often used to determine the final adhesive properties of coatings [10][11][12]. The surface mechanical properties (including nano hardness and elastic modulus) were measured with 5 mN load, using a nanoindentation apparatus (Agilent Technologies, Palo Alto, CA, USA).…”

Section: Methodsmentioning

confidence: 99%

Study of Structural, Mechanical, and Corrosion Resistance of a Nanocomposite CrSiN/CrN/Cr Coating Deposited on AZ31: Effects of Deposition Time

Cui

Yang

2023

Coatings

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To improve the surface properties of Mg alloys and expand the applications of CrN-based materials, composite CrSiN coatings consisting of amorphous Si3N4 and nano CrN phases have been prepared on AZ31 based on the theory of fine grain strengthening and multigrain boundaries. The effect of the thickness of the coating on the structure and properties was investigated. The microstructure was studied by means of X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The mechanical properties, adhesion properties, and corrosion resistance were investigated using a nanoindentater, scratch testers, and electrochemical workstations. The results show that the coating consists of a face-centered cubic CrN phase, that Si3N4 is not found in the diffraction pattern, and that the HRTEM images show a composite structure of amorphous and nanocrystalline phases. With the increase in deposition time (thickness), the surface roughness decreases, the defects disappear, and the interface has no visible defects. Moreover, the hardness and elastic modulus of the coating increase, corrosion resistance improves, adhesion performance first increases and then decreases. The adhesion between coating and substrate reaches the maximum when sputtering time is 50 min, which corresponds to the CrSiN thickness of 0.79 μm.

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“…Using these larger molecules, with the molecular weight, the ionization rate increases, thereby improving thin lm deposition. This is evenly the case for unsaturated molecules, for instance, with ethylene (C 2 H 4 ), and acetylene (C 2 H 2 ) [21,22,23]. For example, the deposition rate and, consequently, the material balance increased by a factor ≈4 when using C 2 H 2 instead of CH 4 [11].…”

Section: Introductionmentioning

confidence: 98%

Pulsed-aerosol assisted low-pressure plasma for thin film deposition

Carnide,

Simonnet,

Sadek

et al. 2023

Preprint

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Plasma-enhanced chemical vapor deposition (PE-CVD) is intensively studied and developed to form (multi-)functional thin films. Generally produced in gases or vapors of thermodynamically stable and chemically inert precursors, aerosol assisted plasma process becomes an alternative as it enables to inject various liquid solutions independently of these characteristics. This study examines the case of pentane aerosols injected in pulsed mode in a low-pressure RF plasma. It produces diamond-like carbon thin films with material balance larger than those obtained in gaseous processes. Here, the deposition process is controlled by the pulsed injection. Indeed, the dynamics of thin film deposition result in time-dependent mechanisms at the pulse scale related to the temporary increase of the working pressure and the presence of liquid droplets in the plasma volume. Hence, thin film deposition is controlled by plasma-surface as well as plasma-droplets interactions. Consequently, aerosol-assisted plasma processes are really relevant for the deposition of (multi-)functional coatings.

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Effect of hexane precursor diluted with argon on the adherent diamond-like properties of carbon films on steel surfaces

Cited by 18 publications

References 39 publications

Enhancing UV Radiation Resilience of DLC-Coated Stainless Steel with TiO2: A Dual-Layer Approach

Enhancing UV Radiation Resilience of DLC-Coated Stainless Steel with TiO2: A Dual-Layer Approach

Study of Structural, Mechanical, and Corrosion Resistance of a Nanocomposite CrSiN/CrN/Cr Coating Deposited on AZ31: Effects of Deposition Time

Pulsed-aerosol assisted low-pressure plasma for thin film deposition

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