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

CNX thin films were prepared by a pulse cathode arc technique using nitrogen as a dopant at different frequencies. Microstructure, compositions, and morphology of CNX thin films were investigated in the dependence of discharge pulse frequency by Raman spectroscopy, x-ray photoelectric spectroscopy (XPS), atomic force microscopy, scanning electron microscopy, UV–vis spectrophotometry, Hall measurements, and field-emission test. The results of Raman and XPS showed that the Csp2 cluster size of CNX films decreases and then increases and decreases with discharge pulse frequency increasing. The Csp2 cluster size of the films prepared at 9 Hz was the largest. The size of Csp3 content increases for the CNX films at the high discharge pulse frequency. The variation of C–N bonding content with frequency in CNX films is similar to that of Csp2. CNX thin films prepared at a frequency of 9 Hz were improved field-emission properties corresponding to the variation of microstructure parameters (the size and ordering of Csp2 clusters) and compositions (C–N bonds). The excellent field-emission properties, such as a low turn-on electric field of 2.1 V/μm and a high field-emission current density of 517.34 μA/cm2, were obtained.

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Micro-structural, electrical, and tribological properties of SiC/DLC composite coating grown by PLD on steel

Yang,

Pan,

et al. 2024

Surface Engineering

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Protective diamond-like carbon (DLC) composite coating was grown on cylindrical steel surface in a simple inclined pulsed laser deposition (PLD) process. Based on this kind of flexible film-synthesis method, mixed deposition was used to generate the gradient interface that could enhance adhesive strength in Ti/SiC interface, and periodic SiC/DLC layers were grown to reduce residual stress of the pure DLC film. This kind of PLD-grown SiC/DLC composite coating on the curved thin steel that was imitated as piston cylinder showed excellent adhesive property and toughness. Compared with the bare steel, DLC-filmed steel strip had a much lower friction coefficient, higher nano-hardness, and enhanced elastic modulus. Raman spectroscopies showed transform of the micro-structure in DLC layers during friction process, revealing the important reason for reducing friction coefficient. Electrical conductivity test displayed the DLC-filmed steel strip was in high resistance state, although its thickness was only 1.27 μm. Further on, good adhesive strength, excellent toughness and high resistance state of SiC/DLC composite coating could be applied in the MEMS advices.

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

Cited by 4 publications

References 30 publications

A review of typical PLD arrangements: Challenges, awareness, and solutions

A review of typical PLD arrangements: Challenges, awareness, and solutions

Effect of discharge pulse frequency on the microstructure and field-emission performance of CNX films deposited by pulse cathode arc evaporation

Micro-structural, electrical, and tribological properties of SiC/DLC composite coating grown by PLD on steel

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