Influence of the Silicon Interlayer on Diamond-Like Carbon Films Deposited on Glass Substrates

Oliveira, Deiler Antonio Lima; Corat, Evaldo José; Trava-Airoldi, V.J.; Lobo, Anderson Oliveira; Marciano, Fernanda Roberta

doi:10.18066/revunivap.v18i31.50

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Where these results are analogous to Silva's et al (2019) observations with NiCrAlY coatings on 316 steels. Other studies such as Oliveira et al (2012), for diamond coatings and Jardim (2020), for WC coatings on Ti-6Al-4V substrates also corroborate such assertions for well-blended coat/substrate interface. Therefore, the coating process was well executed, according to the parameters defined by Vasconcelos et al (2012), Pita and Silva (2017) and Silva et al (2019).…”

Section: Resultssupporting

confidence: 56%

Structural Characterization of Tungsten Carbide (Wc) Coatings Deposited on 4340 Steels by Co2 Laser Irradiation

Silva,

Ribeiro Jardim,

Paiva Oliveira Leite Dyer

et al. 2024

RevistaUnivap

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The use of coatings that imbue high hardness to industrial tools, becomes a maintenance cost management strategy. Considering the coating capacity to increase the part lifespan, especially the cutting tools and those that are subjected to high degrees of physical and thermal variation stress. Consequently, in recent years the research and development of industrial coatings has grown, aiming the application of coatings with high hardness for cutting tools with metal matrices to form composites. In this sense, tungsten Carbide (WC) coatings are one of the most used in power generation systems, aerospace, automotive and transportation industry due to their properties, which combine high hardness and wear resistance. The present work aims to verify the improvement in mechanical properties of the AISI 4340 steel through the deposition of WC coating sprayed by pneumatic gun and subsequent CO2 laser irradiation. The specimens were characterized by scanning electron microscope, optical microscope and micro-indentation test (microhardness and elasticity modulus measurements). The results show that it is possible to obtain coatings with high hardness, without pores and metallurgically bound to the substrate

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Section: Resultssupporting

confidence: 56%

Structural Characterization of Tungsten Carbide (Wc) Coatings Deposited on 4340 Steels by Co2 Laser Irradiation

Silva,

Ribeiro Jardim,

Paiva Oliveira Leite Dyer

et al. 2024

RevistaUnivap

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“…The most challenging task with DLC coating is having poor adhesion and hence quick wear due to induced stress [13,14] on highly polished surfaces like piston ring. It has been reported that Silicon dioxide (SiO 2 ) interlayer coating or Si doping can drastically improve the adhesion property of DLC film [15][16][17]. Hence, SiO 2 interlayer coating has been incorporated in this study between piston rings and DLC, so as to achieve better adhesiveness.…”

Section: Introductionmentioning

confidence: 99%

Tribological studies of automotive piston ring by diamond-like carbon coating

Vinoth

Detwal

Umasankar

et al. 2019

Tribology - Materials, Surfaces & Interfaces

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Increasing environmental awareness and demanding low energy consumption are of the top priorities for future vehicles manufacturing companies. This can be achieved by reducing wear and friction of engine components, so that its efficiency and lifetime can be increased. Surface treatments and coatings contribute to a better lubrication with oils and can participate significantly in achieving these goals. In this paper, diamond-like carbon (DLC) coating has been incorporated to the vehicle piston rings with different RF powers using magnetron sputtering method. The tribological properties like wear and coefficient of friction have been analysed using Pin-on-Disk tribometer. Micro-hardness and nano-hardness of the coated piston rings were characterized by micro-indentor and nano-indentation processes. Surface microstructure and elemental compositions were observed using Scanning Electron Microscopy. Experimental results demonstrated that the DLC coating shows lower wear and friction under similar operating conditions as compared to uncoated piston rings. Thus, usage of DLC coating has enhanced the engine life time. Silicon interlayer has also been applied between nitrided piston rings and DLC layer in order to have better coating adhesion. The properties of the interlayer are not studied but usage of it is found to protect DLC coating from delamination.

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“…Use of carbide forming interlayers, e.g. Si, 1,2 CrC/C, 3 Al and Ti 4 were reported. Another method to achieve thick and adherent DLC films is to use electrical pulses of at least 0.5 to 10 kV, while the non-metallic component is immersed in plasma 5 or high-energy pulsed deposition, 6 thereby inducing stress relaxation.…”

mentioning

confidence: 99%

Amorphous Carbon Films on Glass Prepared by Hollow Cathodes at Moderate Pressure

Baránková

Bárdoš

Siliņš

2016

ECS J. Solid State Sci. Technol.

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Amorphous carbon coatings were prepared using the rf powered cylindrical and linear hollow cathodes. The hybrid deposition process combines both the Plasma Enhanced Chemical Vapor Deposition (PE CVD) and Physical Vapor Deposition (PVD). A cylindrical graphite nozzle and/or graphite plates were used as hollow cathode targets. The gas mixture used in the deposition process was argon with acetylene. The effect of the rf power as well as of pressure and gas mixture on the deposition rate and properties of the coatings is evaluated. The deposition rates of the coatings can reach high values and even thick coatings do not exhibit delamination.

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Influence of the Silicon Interlayer on Diamond-Like Carbon Films Deposited on Glass Substrates

Cited by 3 publications

References 12 publications

Structural Characterization of Tungsten Carbide (Wc) Coatings Deposited on 4340 Steels by Co2 Laser Irradiation

Structural Characterization of Tungsten Carbide (Wc) Coatings Deposited on 4340 Steels by Co2 Laser Irradiation

Tribological studies of automotive piston ring by diamond-like carbon coating

Amorphous Carbon Films on Glass Prepared by Hollow Cathodes at Moderate Pressure

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