Thermal stability of Cr-doped diamond-like carbon films synthesized by cathodic arc evaporation

Chiu, Ming‐Chih; Hsieh, Wen‐Pin; Ho, Wei-Yu; Wang, Da-Yung; Shieu, Fuh‐Sheng

doi:10.1016/j.tsf.2004.09.029

Cited by 68 publications

(26 citation statements)

References 14 publications

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“…Table 1 summarizes the XPS C1s spectra deconvolution of carbon films, including amorphous carbon film (a-C), a-C:H (DLCH) and a-C:H:X (doping cases), the different curve fitting methods using 80% up to 100% Gaussian functions consist of two, three or four deconvoluted peaks in order to quantitatively evaluate the sp 2 /sp 3 ratio. [15][16][17][18][19][20][21][22][23][24][25][26][27][28] Diez et al have mentioned that the Gaussian function could be used to account for the instrumental energy resolution and chemical disorder, and the Lorentzian function could be used to measure the life time of photoionzation process. 15) 3.…”

Section: Methodsmentioning

confidence: 99%

Correlation between ID&frasl;IG Ratio from Visible Raman Spectra and sp2/sp3 Ratio from XPS Spectra of Annealed Hydrogenated DLC Film

et al. 2006

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The hydrogened diamond like carbon film (DLCH) with 1 mm thickness is made by hydrocarbon gas ion beam deposition method. The relationship between I D =I G ratio fitted from visible Raman spectra and sp 2 /sp 3 ratio done from XPS spectra of DLCH film shows a trend. The I D =I G ratio of deconvoluted visible Raman spectra shows a correlation with sp 2 /sp 3 ratio from XPS spectra as annealing temperature increases, the graphitization and the disorder increase. The I D =I G ratios fitted with two-curve Gaussian functions of Raman spectra tend to be proportional to sp 2 /sp 3 ratio fitted with three-curve with 100% Gaussian function of XPS spectra when post annealed treatment is below 400 C and without severe oxidation.

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Section: Methodsmentioning

confidence: 99%

Correlation between ID&frasl;IG Ratio from Visible Raman Spectra and sp2/sp3 Ratio from XPS Spectra of Annealed Hydrogenated DLC Film

et al. 2006

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“…Moreover, the graded design in both coating's microstructure and composition significantly improve the coating-substrate adhesion. In order to resolve the second problem − poor thermal stability, metal elements such as Ti, Si, Cr, Mo or W are incorporated into the carbon-based coatings [4,11,12,13]. These metal-doped DLC coatings improve the thermal stability and simultaneously reduce the friction coefficient compared to pure DLC coating [4, 10, 14 -18].…”

Section: Introductionmentioning

confidence: 99%

“…The thermal stability of the Cr and Si doped DLC coatings was reported in the range of 300°C − 400°C [12,32] and 300°C − 500°C [11,14] respectively depending on the coating deposition procedure and test conditions. The oxidation resistance of Ti-doped DLC coating was reported up to ~450°C [4] whereas Mo-DLC and W-DLC coatings were found thermally stable up to ~500°C [13].…”

Section: Introductionmentioning

confidence: 99%

Tribological behaviour of Mo–W doped carbon-based coating at ambient condition

Mandal

Ehiasarian

Hovsepian

2015

Tribology International

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“…[13], for instance, showed how regular arrays of dimples obtained via LST on DLC films were able to reduce the friction coefficient considerably under oil lubrication. In recent years, LST has become a key technology for enhancing specific tribological properties of DLC coatings [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Laser decoating of DLC films for tribological applications

Zivelonghi

Giorleo

Gelfi

et al. 2017

Int J Adv Manuf Technol

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Damaged DLC coatings usually require remanufacturing of the entire coated components starting from an industrial chemical de-coating step. Alternatively, a complete or local coating repair can be considered. To pursue this approach, however, a local coating removal is needed as first operation. In this context, controlled decoating based on laser sources can be a suitable and clean alternative to achieve a prefixed decoating depth with high accuracy. In the present study, we investigated a laser-based decoating process executed on multilayered DLC films for advanced tribological applications (deposited via a hybrid PVD/PE-CVD technique). The results were acquired via multifocal optical digital microscopy (MF-ODM), which allowed high-resolution 3D surface reconstruction as well as digital profilometry of the lasered and unlasered surface. The study identifies the most critical process parameters which influence the effective decoating depth and the postdecoating surface roughness. In particular, the role of pulse overlap (decomposed along orthogonal directions), laser fluence, number of lasing passes and assist gas is discussed in text. A first experimental campaign was designed to identify the best conditions to obtain full decoating of the DLC + DLC:Cr layers. It was observed that decreasing the marking speed to 200 mm/s was necessary to obtain a sufficient pulse overlap and a nearly planar ablation profile. By operating with microsecond pulses and 1 J/cm 2 (fairly above the ablation threshold), less than 10 passes were needed to obtain full decoating of the lasered area with an etching rate of 1.1 μm/loop. Further experiments were then executed in order to minimise the roughness of the rest surface with the best value found at around 0.2 μm. Limited oxidation but higher R a values were observed in Ar atmosphere.

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Thermal stability of Cr-doped diamond-like carbon films synthesized by cathodic arc evaporation

Cited by 68 publications

References 14 publications

Correlation between <I>I</I><SUB>D</SUB>&frasl;<I>I</I><SUB>G</SUB> Ratio from Visible Raman Spectra and sp<SUP>2</SUP>/sp<SUP>3</SUP> Ratio from XPS Spectra of Annealed Hydrogenated DLC Film

Correlation between <I>I</I><SUB>D</SUB>&frasl;<I>I</I><SUB>G</SUB> Ratio from Visible Raman Spectra and sp<SUP>2</SUP>/sp<SUP>3</SUP> Ratio from XPS Spectra of Annealed Hydrogenated DLC Film

Tribological behaviour of Mo–W doped carbon-based coating at ambient condition

Laser decoating of DLC films for tribological applications

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