Microstructural and tribological characterization of DLC coatings deposited by plasma enhanced techniques on steel substrates

Kasiorowski, T.; Lin, Jinn; Soares, Paulo; Lepienski, Carlos Maurício; Neitzke, César Augusto; Souza, Gelson Biscaia de; Torres, Ricardo

doi:10.1016/j.surfcoat.2020.125615

Cited by 40 publications

(20 citation statements)

References 51 publications

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“…The COF results are lower than those reported by Wang et al [69], where values of COF between 0.12 and 0.21 for WC-DLC coatings are reported, or in reference [70], where values of 0.12-0.59 for DLC coatings on AISI H11 steels with plasma nitriding pretreatment are reported. However, similar results are reported in references [26,71].…”

Section: Friction and Wear Testssupporting

confidence: 91%

“…A reduction in residual stress allows one to enhance adhesion critical load values despite showing lower values of hardness and wear resistance. As can be seen in Table 5, the adhesion results obtained in this study are higher than those reported in the references [26,27,66]. On the other hand, similar results of Lc2 were reported in reference [34], with…”

Section: Adhesion Testssupporting

confidence: 79%

“…For this reason, new techniques that sought to achieve coatings with great adhesion while maintaining the excellent mechanical and tribological properties were developed. Some recent studies showed improvements in adherence, with values of second critical scratch load (Lc2) being 25 N [26] or around 10 N [27], although these values are insufficient for the applications mentioned above. Other works tried to improve the adhesion by applying duplex treatments on different types of steel, which consists of a previous thermochemical plasma nitriding pretreatment followed by a DLC deposition [28,29].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Tribomechanical Properties of HiPIMS with Positive Pulses DLC Coatings on Different Tools Steels

et al. 2020

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Diamond-like carbon (DLC) coatings are very interesting due to their extraordinary properties; their excellent wear resistance, very low friction coefficient, great hardness, high elastic modulus or biocompatibility can be highlighted, as can their multifunctionality. Because of this, over recent decades they have been widely used in tribological applications, improving the performance and the useful life of machining tools in an effective way. However, these coatings have a disadvantage compared to other coatings deposited by commercially available techniques—their resultant adhesion is worse than that of other techniques and limits their industrial applications. In this work, tribological results of a scratch test, wear resistance and nanoindentation of tetrahedral amorphous carbon (ta-C) and tungsten carbide:carbon (WC:C) DLC coatings deposited by means of novel high-power impulse magnetron sputtering (HiPIMS) technology with positive pulses are reported. The coatings were deposited in three different tools steels: K360, vanadis 4 and vancron. These tools’ steels are very interesting because of their great and wide industrial applicability. Experimental results showed excellent tribological properties, such as resistance to wear or adhesion, in the two types of DLC coatings.

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Section: Friction and Wear Testssupporting

confidence: 91%

Section: Adhesion Testssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Tribomechanical Properties of HiPIMS with Positive Pulses DLC Coatings on Different Tools Steels

et al. 2020

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“…Carbon coatings are a very well investigated material used to improve multiple properties of the surface layer. They can be used to increase hardness [ 1 , 2 , 3 ], improve wear resistance, reduce the coefficient of friction [ 1 , 2 , 3 , 4 , 5 ] and enhance the biocompatibility of the modified surface [ 6 , 7 ] or its resistance to colonisation by micro-organisms [ 7 , 8 ]. Due to their advantages, diamond-like carbon (DLC) coatings are tested in a wide range of applications in very different areas: biomedicine [ 5 , 6 , 7 , 8 , 9 ], machining [ 10 , 11 ], electronics [ 12 , 13 ] and electrochemistry [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Plasma Pre-Treatment on the Tribological Properties of DLC Coatings on PDMS Substrates

et al. 2021

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The processes of the deposition of carbon coatings on PDMS (polydimethylsiloxane) substrates using plasma techniques are widely used in a large number of studies, in applications ranging from electronic to biological. That is why the potential improvement of their functional properties, including tribological properties, seems very interesting. This paper presents an analysis of the impact of plasma pre-treatment on the properties of the produced diamond-like carbon (DLC) coatings, including changes in the coefficients of friction and wear rates. The initial modification processes were performed using two different techniques based on low-pressure plasma (RF PACVD, radio-frequency plasma-assisted chemical vapour deposition) and dielectric barrier discharge (DBD) plasma. The effects of the above-mentioned treatments on the geometric structure of the PDMS surface and its water contact angles and stability over time were determined. The basic properties of the DLC coatings produced on unmodified substrates were compared to those of the coatings subjected to plasma pre-treatment. The most interesting effects in terms of tribological properties were achieved after the DBD process and production of DLC coatings, achieving a decrease in wear rates to 2.45 × 10−8 mm3/Nm. The tests demonstrate that the cross-linking of the polymer substrate occurs during plasma pre-treatment.

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“…To clarify the mechanism, as an example, results confirming the effect of residual stress due to surface roughness on the adhesion of the film obtained by numerical simulation and results evaluating mechanical properties, including the adhesion of the film and corrosion resistance, obtained by various test methods have been reported [ 6 , 7 ]. In addition, with the increased range of combinations of substrates and hard thin films, numerous efforts have been made to improve adhesion and suppress the occurrence of delamination by optimizing the substrate material, the film-forming conditions, and the intermediate layer [ 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Anti-Adhesion Characteristics of Diamond-Like Carbon Film by Combining Friction and Wear Test with Step Loading and Weibull Analysis

Mano

Ohana

2021

Materials

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Anti-adhesion characteristics are important requirements for diamond-like carbon (DLC) films. The failure load corresponding to the anti-adhesion capacity varies greatly on three types of DLC film (hydrogen-free amorphous carbon film (a-C), hydrogenated amorphous carbon film (a-C:H), and tetrahedral hydrogen-free amorphous carbon film (ta-C)) in the friction and wear test with step loading using a high-frequency, linear-oscillation tribometer. Therefore, a new method that estimates a representative value of the failure load was developed in this study by performing a statistical analysis based on the Weibull distribution based on the assumption that the mechanism of delamination of a DLC film obeys the weakest link model. The failure load at the cumulative failure probabilities of 10% and 50% increased in the order ta-C < a-C:H < a-C and ta-C < a-C < a-C:H, respectively. The variation of the failure load, represented by the Weibull slope, was minimum on ta-C and maximum on a-C:H. The rank of the anti-adhesion capacity of each DLC film with respect to the load obtained by a constant load test agreed with the rank of the failure load on each DLC film at the cumulative failure probability of 10% obtained by Weibull analysis. It was found to be possible to evaluate the anti-adhesion capacity of a DLC film under more practical conditions by combining the step loading test and Weibull analysis.

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Microstructural and tribological characterization of DLC coatings deposited by plasma enhanced techniques on steel substrates

Cited by 40 publications

References 51 publications

Comparative Study of Tribomechanical Properties of HiPIMS with Positive Pulses DLC Coatings on Different Tools Steels

Comparative Study of Tribomechanical Properties of HiPIMS with Positive Pulses DLC Coatings on Different Tools Steels

Impact of Plasma Pre-Treatment on the Tribological Properties of DLC Coatings on PDMS Substrates

Evaluation of Anti-Adhesion Characteristics of Diamond-Like Carbon Film by Combining Friction and Wear Test with Step Loading and Weibull Analysis

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