Modification of optical and mechanical properties of nitrogen doped diamond-like carbon layers

Moghadam, R. Zarei; Dizaji, H. Rezagholipour; Ehsani, M.H.

doi:10.1007/s10854-019-02343-4

Cited by 17 publications

(5 citation statements)

References 60 publications

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“…As a metastable form of amorphous carbon film, diamond-like carbon (DLC) film has received continuous interest and research regarding innovations and applications in the field of tribology, due to the unique properties of the DLC films, including self-lubrication, high hardness, and excellent wear resistance [1][2][3][4][5]. At first, DLC film is considered to be a surface protection coating deposited on metal materials and ceramic surfaces exclusively.…”

Section: Introductionmentioning

confidence: 99%

Effects of Polyurethane Substrate Pre-Treatment on Pulsed Cathodic Arc Deposited DLC Films

et al. 2020

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Diamond-like carbon (DLC) films were deposited by means of pulsed cathodic arc deposition on pretreated polyurethane (PU) rubber substrates. Tetrachloroethylene was chosen as a dissolution method to remove the plasticizer added in the PU substrates. Scanning electron microscopy (SEM) and Raman spectroscopy were applied to observe and characterize the surface morphologies and compositions of the deposited films, respectively. The tribological behaviours of uncoated and coated rubbers were investigated with ring-on-disc tribo experiments under dry sliding conditions. The coefficients of friction (COFs) of the coated rubbers were 40% lower than those of uncoated rubber and the COFs of different samples decreased first and then increased slightly with the increase in temperature and the time of ultrasonic treatment under dry friction. Based on the above experiments, ultrasonic treatment with tetrachloroethylene contributes to the increase in the wear resistance of DLC films deposited on PU rubbers. The most suitable temperature and time of ultrasonic treatment with tetrachloroethylene is 50 °C for 15 min.

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Section: Introductionmentioning

confidence: 99%

Effects of Polyurethane Substrate Pre-Treatment on Pulsed Cathodic Arc Deposited DLC Films

et al. 2020

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“…For example, Champi et al 13 and Franceschini et al 28 each observed a maximum hardness of about 22 GPa in a-C:H:N films. Interestingly, recently, Zarei Moghadam et al 29 prepared nitrogen-incorporated DLC films and found a maximum hardness of about 26 GPa despite using a very low peak load of just 0.3 mN (about 13 times lower load than the present case). This suggests that the hardness of our n-C:H:N films is superior to many of previous works on carbon films.…”

Section: Resultsmentioning

confidence: 51%

Unusual High Hardness and Load-Dependent Mechanical Characteristics of Hydrogenated Carbon–Nitrogen Hybrid Films

Dwivedi

Balasubramanian

Sahu

et al. 2022

ACS Appl. Mater. Interfaces

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Mechanical components are exposed to a rigorous environment in a number of applications including engineering, aerospace, and automobiles. Thus, their service lifetime and reliability are always on the verge of risk. Protective coatings with high hardness are required to enhance their service lifetime and minimize the replacement cost and waste burden. Hydrogenated amorphous carbon including nitrogen-incorporated films, that are commonly deposited by plasma-enhanced chemical vapor deposition, are widely used for commercial protective coating applications. However, their mechanical hardness still falls into the moderate hard regime. This needs to be substantially enhanced for advanced applications. Here, we report the synthesis of very hard nanostructured hydrogenated carbon–nitrogen hybrid (n-C:H:N) films. The optimized n-C:H:N film displays a hardness of about 36 GPa, elastic modulus of 360 GPa, and reasonably good elastic recovery (ER) of 62.7%. The mechanical properties of n-C:H:N films are further tailored when nitrogen pressure is tuned during the growth. The realized remarkably improved mechanical properties are correlated with the films’ structural properties and experimental growth conditions. We also conducted density functional theory calculations that show the trend for the elastic modulus of the amorphous carbon films with varying nitrogen concentrations matches well with experimentally measured values. Finally, we probed load-dependent mechanical properties of n-C:H:N films and found an anomalous behavior; some of the mechanical parameters, for instance, ER, reveal an irregular trend with indentation load, which we explain in the framework of the film–substrate composite concept. Overall, this work uncovers many unknown and exciting mechanical phenomena that could pave the way for new technological developments.

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“…They found the variation of bandgap value from 2.61 eV to 2.39 eV by increasing N 2 ow rate from 5 sccm to 50 sccm (Moghadam et al 2019). The mechanical properties of N-doped DLC were studied by Chen and the co-authors.…”

Section: Introductionmentioning

confidence: 96%

Optical and structural properties of nitrogen incorporated Ni doped diamond-like carbon thin films

Zarei

Momeni

2023

Opt Quant Electron

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Co-depositing of nickel (Ni) and nitrogen (N2) in the diamond-like carbon (DLC) matrix was synthesized by pulsed laser deposition (PLD) technique. In the work presented here, N2 was injected as a reactive gas to optimize the optical, and structural properties of Ni:N-DLC thin lms, although N2 to argon (Ar) gas ratio was kept constant. Statistical properties of thin lms were calculated from the surface topographic images of 2Ni:N-DLC, 3Ni:N-DLC, and 4Ni-N-DLC samples. The characterization of samples have been carried out by by atomic force microscopy (AFM), Raman spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible spectroscopy. Band gap energies of 2Ni:N-DLC, 3Ni:N-DLC and 4Ni:N-DLC have been illustrated that the background N2 gas can be used for optimization of the electrical properties of Ni-DLC thin lms.

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Modification of optical and mechanical properties of nitrogen doped diamond-like carbon layers

Cited by 17 publications

References 60 publications

Effects of Polyurethane Substrate Pre-Treatment on Pulsed Cathodic Arc Deposited DLC Films

Effects of Polyurethane Substrate Pre-Treatment on Pulsed Cathodic Arc Deposited DLC Films

Unusual High Hardness and Load-Dependent Mechanical Characteristics of Hydrogenated Carbon–Nitrogen Hybrid Films

Optical and structural properties of nitrogen incorporated Ni doped diamond-like carbon thin films

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