Influence of scratches on the wear behavior of DLC coatings

Pagnoux, Geoffrey; Fouvry, S.; Peigney, Michaël; Delattre, Benoit; Mermaz-Rollet, Guillaume

doi:10.1016/j.wear.2014.12.010

Cited by 10 publications

(2 citation statements)

References 21 publications

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“…The wear rate of films is reduced obviously through DCT, and the wear resistance of DLC films improved remarkably. Wear resistance and lifetime of DLC films are thus ruled by its capacity to handle through thickness cracks and interfacial failure [21], just as the improvement of bonding strength that has been discussed in section 2.2 will promote wear resistance of DLC films. Additionally, wear resistance is influenced by load-bearing capacity of substrate.…”

Section: Structure Of Dlc Filmsmentioning

confidence: 99%

Effect of Deep Cryogenic Pre-treatment for Substrates on Mechanical Property of DLC Films

Gong¹,

Nie

Jin

et al. 2016

Proceedings of the 2016 2nd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE 2016)

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2µm thick DLC multilayer films were deposited on W9 high-speed steel with deep cryogenic pre-treatment (DCT) for 30 hours in liquid nitrogen by unbalanced magnetron sputtering technique, which were compared with the DLC films without DCT. The results show that compound systems with DCT exhibit higher film-substrate bonding strength and superior friction wear property, which are closely related to the DCT effect that martensitic transformation and decomposition, grain refinement and carbides precipitation. Thus the hardness, strength and residual stress of substrate are improved remarkably, and deformation compatibility between film and substrate under external load become more coordinating. Meanwhile, surface morphology of substrate is effectively adjusted by phase transformation, as a result, element diffusion and mechanical interlocking effect of film-substrate interface are optimized with added grain boundary and fine uniform organization. IntroductionDiamond-like Carbon (DLC) films, a kind of fascinating materials, having some features of both graphite and diamond, such as high hardness, good wear resistance, low friction coefficient, chemical inertness and biocompatibility, which have been extensively used in many fields due to its excellent properties [1][2][3][4]. However, high residual compressive stress and weak adhesion of DLC films to substrate has restricted their working life and applications [5][6]. To reduce the residual stress and to enhance the adhesion and mechanical properties of DLC films, a lot of techniques have been studied by researchers [7][8][9][10][11], such as changing sedimentary means, doping third elements (N, Cr, Ti, W, etc), incorporating metal transition layer. Nonetheless, previous studies have their own limitations because these ways focus primarily on changing the properties of films.Deep cryogenic treatment is a special kind of heat treatment technology, and has been efficiently performed on metal materials since 1940. Samples are cooled down in liquid nitrogen for some periods, then gradually warmed up to room temperature, which is used regularly after quenching and before tempering. A lot of studies suggest that DCT allows the occurrence of phase transition and microstructure refinement, it can significantly improve some properties of metal substrate [12][13][14]. From previous studies, we believe that the hardness, strength and surface state of metallic substrates are equally important for bonding strength and properties of films [15][16]. In this paper, deep cryogenic treatment was used to improve the properties of metallic substrates. we mainly investigated the mechanical property of DLC films from film-substrate bonding strength and friction performance. Moreover, the effect of DCT on microstructure and surface state of substrates were significantly discussed as well as the optimization mechanism of film-substrate interface.

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Section: Structure Of Dlc Filmsmentioning

confidence: 99%

Effect of Deep Cryogenic Pre-treatment for Substrates on Mechanical Property of DLC Films

Gong¹,

Nie

Jin

et al. 2016

Proceedings of the 2016 2nd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE 2016)

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“…It is clear that a lubricated sliding contact in many cases has advantages in terms of the COF and the surface protection. However, in some cases lubricated tests with texturized surfaces have limitations regarding the relation between the apparent and real contact area [26, [36][37][38][39] The percentage of texturized area -PTA is also an important variable, especially under lubricated conditions. It has been shown that increasing the PTA value up to circa 20% leads to an effective reduction of the COF, but higher percentages cause the opposite effect [40].…”

Section: Introductionmentioning

confidence: 99%

Friction response of bioinspired AISI 52100 steel surfaces texturized by photochemical machining

Sánchez¹,

Estupiñán²,

Toro³

2021

Surf. Topogr.: Metrol. Prop.

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This work shows the friction response of textured steel surfaces whose deterministic design is inspired in the characteristics of the Vipera Ammodytes snake skin. The skin was studied to identify morphological, chemical, mechanical and tribological attributes that served as inspiration for the design of the deterministic patterns, which were reproduced in AISI 52100 steel samples by Photochemical Machining (PCM). The textured samples were tested in a pin-on-disc tribometer using AISI H13 steel as counter body. The results showed an effective reduction of up to 38% in the friction coefficient of the texturized samples when compared to the conventional ones, as well as an anisotropic friction behavior as a function of the sliding direction. In addition, it was observed that the percentage of texturized area of the samples strongly affected the friction response, especially for values higher than 20%.

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Surface modification of aluminum alloy by wire electrical discharge machining with SiC nanofluid dielectric

Guo

Wang

Xie

et al. 2023

Int J Adv Manuf Technol

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Influence of scratches on the wear behavior of DLC coatings

Cited by 10 publications

References 21 publications

Effect of Deep Cryogenic Pre-treatment for Substrates on Mechanical Property of DLC Films

Effect of Deep Cryogenic Pre-treatment for Substrates on Mechanical Property of DLC Films

Friction response of bioinspired AISI 52100 steel surfaces texturized by photochemical machining

Surface modification of aluminum alloy by wire electrical discharge machining with SiC nanofluid dielectric

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