Articles de revues : « Arc-DLC coating »

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Vasylyev, V. V., Strel'nitskij V.E. et V. B. Makarov. « DLC Coatings on Spherical Elements of HIP Endoprostheses ». European Journal of Engineering and Formal Sciences 2, n^o 3 (29 décembre 2018) : 42. http://dx.doi.org/10.26417/ejef.v2i3.p42-47.

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Hard coatings are increasingly being used in medicine to protect metal endoprostheses The experimental process for the high-productive synthesis of high-quality diamond-like carbon (DLC) coatings with high hardness and a sufficiently high level of adhesion to the spherical shaped parts of the hip joint made from the stainless steel or cobalt-chrome alloy have been developed. DLC coating deposition was performed by vacuum-arc method from a high-productive source of the filtered vacuum-arc carbon plasma of rectilinear type with a "magnetic island". The high degree of thickness uniformity in the coating on the head of the hip joint with a high adhesion to the metal joint base was developed. Modernization of the vacuum arc plasma source allowed to accelerate the cathode spot motion, exclude substrate overheating and increase the diamond-like carbon hardness up to 30-40 GPa. The high adhesion level was achieved as a result of the high voltage pulsed of substrate bias potential use and multilayer architecture of DLC coating. The DLC coating on the heads of hip endoprosthesis did not peel off when boiling endoprosthesis or when immersing it into the liquid nitrogen. JEL O31

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Vasylyev, V. V., V. E. Strel’nitskij, V. B. Makarov, M. A. Skoryk et G. O. Lazarenko. « DLC Coatings on Spherical Elements of HIP Endoprostheses ». European Journal of Engineering and Formal Sciences 2, n^o 3 (1 décembre 2018) : 41–47. http://dx.doi.org/10.2478/ejef-2018-0015.

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Abstract Hard coatings are increasingly being used in medicine to protect metal endoprostheses The experimental process for the high-productive synthesis of high-quality diamond-like carbon (DLC) coatings with high hardness and a sufficiently high level of adhesion to the spherical shaped parts of the hip joint made from the stainless steel or cobalt-chrome alloy have been developed. DLC coating deposition was performed by vacuum-arc method from a high-productive source of the filtered vacuum-arc carbon plasma of rectilinear type with a "magnetic island". The high degree of thickness uniformity in the coating on the head of the hip joint with a high adhesion to the metal joint base was developed. Modernization of the vacuum arc plasma source allowed to accelerate the cathode spot motion, exclude substrate overheating and increase the diamond-like carbon hardness up to 30-40 GPa. The high adhesion level was achieved as a result of the high voltage pulsed of substrate bias potential use and multilayer architecture of DLC coating. The DLC coating on the heads of hip endoprosthesis did not peel off when boiling endoprosthesis or when immersing it into the liquid nitrogen.

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Strel'nitskij, V. E., V. V. Vasylyev, V. B. Makarov et H. О. Lazarenko. « Diamond-like carbon coatings pin-on-disk wear testing ». Physics and Chemistry of Solid State 24, n^o 3 (26 septembre 2023) : 520–29. http://dx.doi.org/10.15330/pcss.24.3.520-529.

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The aim of this study is to investigate the wear resistance of diamond-like carbon (DLC) films and wear debris of polyethylene using pin-on-disc testing on two groups of CoCrMo discs with DLC coatings. DLC coatings deposited with use high productive vacuum-arc filtered plasma source in two regimes: with and without Ti interlayer on CoCrMo discs. The Orthopaedic Innovation Centre performed 2.5 million cycles (Mc) of POD testing on two groups of CoCrMo discs with DLC based on ASTM G99-17. The discs used were made of wrought low carbon alloy CoCrMo according to ASTM F1537. Wear performance of the PE pins against the DLC coated discs was determined and reported below. Lubricant samples were collected for each group after 0.5 and 2.5 Mc of testing, and used to characterize wear particles. All PE pins were assessed for damage features following 2.5 Mc of wear testing. The damage features identified included burnishing, scratching and grooving. The new process of DLC coating deposition from filtered vacuum arc plasma flows allows obtaining the stable DLC coating on the CoCrMo substrate. Thus, considering the low friction coefficient and the stable behavior of DLC such coating would be highly perspective for CoCrMo artificial joint implants.

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Zhu, Wen, Chao Yin Nie, Chun Hua Ran, Yi Dong Jin et Yang Zhao. « Study on Electrochemical Corrosion Behavior Comparison between DLC and TiN Coatings under Different Corrosive Environment ». Advanced Materials Research 750-752 (août 2013) : 1977–81. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.1977.

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Diamond-like carbon (DLC) and TiN coatings were deposited on the 304 austenitic stainless steel(SUS304) substrates by using unbalanced magnetron sputtering and arc ion plating techniques, respectively. The phase structure and surface morphology of coatings were characterized by SEM and XRD.The electrochemical corrosion of two coatings in different electrochemical solutions (including3.5%NaCl,10%HCl,20%NaOH) were investigated by electrochemical workstation.The result showed that DLC coating was amorphous structure and TiN coating was nano-crystalline structure.The surface of DLC coating was smooth and dense,while TiN coating existed pits.In 10%HCl and 3.5%NaCl solutions,the corrosion resistance of DLC coating increased by 4.16 and 10.9 times compared with SUS304 and increased by 5.16 and 1.11 times compared with TiN coating,respectively.But in 20%NaOH solution, the corrosion resistance of DLC was not superior to SUS304 and TiN coating.In 10%HCl solution,the corrosion resistance of TiN coating increased by 9.81 times compared with 304 SUS304.But in 3.5%NaCl and 20%NaOH solutions,the corrosion resistance of TiN coating was worse than SUS304.

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XUE, WENBIN, HUA TIAN, JIANCHENG DU, MING HUA, XU ZHANG et YONGLIANG LI. « DUPLEX Al2O3/DLC COATING ON 15SiCp/2024 ALUMINUM MATRIX COMPOSITE USING COMBINED MICROARC OXIDATION AND FILTERED CATHODIC VACUUM ARC DEPOSITION ». Surface Review and Letters 19, n^o 04 (26 juillet 2012) : 1250036. http://dx.doi.org/10.1142/s0218625x12500369.

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Microarc oxidation (MAO) treatment produces a thick Al2O3 coating on the 15SiCp/2024 aluminum matrix composite. After pretreatment of Ti ion implantation, a thin diamond-like carbon film (DLC) was deposited on the top of polished Al2O3 coating by a pulsed filtered cathodic vacuum arc (FCVA) deposition system with a metal vapor vacuum arc (MEVVA) source. The morphology and tribological properties of the duplex Al2O3 /DLC multiplayer coating were investigated by Raman spectroscopy, scanning electron microscopy (SEM) and SRV ball-on-disk friction tester. It is found that the duplex Al2O3 /DLC coating had good adhesion and a low friction coefficient of less than 0.07. As compared to a single Al2O3 or DLC coating, the duplex Al2O3 /DLC coating on aluminum matrix composite exhibited a better wear resistance against ZrO2 ball under dry sliding, because the Al2O3 coating as an intermediate layer improved load support for the top DLC coating on 15SiCp/2024 composite substrate, meanwhile the top DLC coating displayed low friction coefficient.

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Chang, Chi Lung, Jui Yun Jao, Wei Yu Ho et Da Yung Wang. « Characteristics of TiAl-Doped DLC/TiAlN/TiN Multilayered Coatings Synthesized by Cathodic Arc Evaporation ». Solid State Phenomena 118 (décembre 2006) : 247–56. http://dx.doi.org/10.4028/www.scientific.net/ssp.118.247.

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The combinations of TiAl-doped DLC and TiAlN/TiN layers were designed to deposit on the tool steels using cathodic arc evaporation in a continuously single batch process. The economic advantage in depositing the combined coating in one production scale of PVD system is of practical importance. The TiAl-doped DLC as lubricant coatings were synthesized by using arc plasma sources mounted with Ti50Al50-target to emit high energy ion plasma to activate the decomposition of acetylene reactive gases. The results show that the TiAl-doped DLC and TiAlN/TiN combined coatings retained lower friction coefficient at approximately 0.15 during the steady-state sliding. The lubricity and wear resistance of TiAl-doped DLC/TiAlN/TiN coatings is then demonstrated to potentially be applied to the cutting tools with no lubricants.

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Chayeuski, Vadzim, Valery Zhylinski, Victor Kazachenko, Aleksandr Tarasevich et Abdelhafed Taleb. « Structural and Mechanical Properties of DLC/TiN Coatings on Carbide for Wood-Cutting Applications ». Coatings 13, n^o 7 (2 juillet 2023) : 1192. http://dx.doi.org/10.3390/coatings13071192.

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In this work, the diamond-like carbon and titanium nitride (DLC/TiN) multilayer coatings were prepared on a cemented tungsten carbide substrate (WC—3 wt.% Co) using the cathodic vacuum arc physical vapor deposition (Arc-PVD) method and pulsed Arc-PVD method with a graphite cathode for the deposition of TiN and carbon layers, respectively. The structural and mechanical properties of the prepared coatings were studied, and different techniques, such as scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Raman spectroscopy, and microindentation techniques investigated their microstructure, composition, and phases. The prepared coatings had a multilayer structure with distinct phases of DLC, TiN, and carbide substrate. The potentiodynamic polarization method (PDP) was performed for the DLC/TiN multilayer coatings in 3% NaCl solution to evaluate the corrosion resistance of the prepared coatings. It has been shown that the DLC layer provided the coating with a polarization resistance of 564.46 kΩ. Moreover, it has been demonstrated that the DLC/TiN coatings had a high hardness of 38.7–40.4 GPa, which can help to extend the wood-cutting tools’ life.

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Cheng, Feng, Weixi Ji et Junhua Zhao. « Influence of adhesion strength on cavitation erosion resistance of diamond-like carbon coating ». Industrial Lubrication and Tribology 71, n^o 5 (8 juillet 2019) : 724–30. http://dx.doi.org/10.1108/ilt-01-2019-0024.

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Purpose The disbonding of DLC coating is a main failure mode in the high-speed cavitation condition, which shortens the service life of the bearing. This study aims to investigate influence of adhesion strength on cavitation erosion resistance of DLC coating. Design/methodology/approach Three DLC coatings with different adhesion strengths were grown on the 304 steel surfaces by using a cathodic arc plasma deposition method. Cavitation tests were performed by using a vibratory test rig to investigate the influence of adhesion strength on cavitation erosion resistance of a DLC coating. The cavitation mechanism of the substrate-coating systems was further discussed by means of surface analyses. Findings The results indicated that, the residual stress decreased and then increased with the increasing DLC coating thickness from 1 µm to 2.9 µm, and the lower residual stress can improve the adhesion strength of the DLC coating to the substrate. It was also concluded that, the plastic deformation as well as the fracture occurred on the DLC coating surface at the same time, owing to higher residual stress and poorer adhesion strength. However, lower residual stress and better adhesion strength could help resist the occurrence of the coating fracture. Originality/value Cavitation tests were performed by using a vibratory test rig to investigate the influence of adhesion strength on cavitation erosion resistance of the DLC coating. The plastic deformation and the fracture occurred on the DLC coating surface at the same time, owing to higher residual stress and poorer adhesion of coating. Lower residual stress and better adhesion of coating could resist the occurrence of the DLC coating fracture.

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Dobruchowska, Ewa, Justyna Schulz, Viktor Zavaleyev, Jan Walkowicz, Tomasz Suszko et Bogdan Warcholinski. « Influence of the Metallic Sublayer on Corrosion Resistance in Hanks’ Solution of 316L Stainless Steel Coated with Diamond-like Carbon ». Materials 17, n^o 18 (12 septembre 2024) : 4487. http://dx.doi.org/10.3390/ma17184487.

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The purpose of the study was to ascertain the corrosion resistance in Hanks’ solution of Cr-Ni-Mo stainless steel (AISI 316L) coated with diamond-like carbon (DLC) coatings to establish its suitability for biomedical applications, e.g., as temporary implants. The influence of the carbon coating thickness as well as the correlated effect of the metallic sublayer type and defects present in DLC films on corrosion propagation were discussed. The results obtained were compared with findings on the adhesion of DLC to the steel substrate. The synthesis of carbon thin films with Cr and Ti adhesive sublayers was performed using a combined DC and a high-power-impulse vacuum-arc process. Evaluation of the corrosion resistance was carried out by means of potentiodynamic polarisation tests and scanning electron microscopy. Adhesive properties of the sublayer/DLC coating systems were measured using a scratch tester. It was found that systems with Ti sublayers were less susceptible to the corrosion processes, particularly to pitting. The best anti-corrosion properties were obtained by merging Ti with a DLC coating with a thickness equal to 0.5 μm. The protective properties of the Cr/DLC systems were independent of the carbon coating thickness. On the other hand, the DLC coatings with the Cr sublayer showed better adhesion to the substrate.

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Guo, Ziming, Renxin Wang, Hu Yang, Junrong Chen, Rongchuan Lin, Shasha Wei et Bo Li. « Preparation and Performance Study of Si-DLC Based on Ion Deposition of Different Multiple Gradient Transition Layers ». Coatings 12, n^o 7 (22 juin 2022) : 882. http://dx.doi.org/10.3390/coatings12070882.

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In order to improve the lower adhesion strength of Si-DLC coatings to the substrate and enhance its wear resistance, Si-DLC coatings with different transition layers (AlTiSiN, AlCrN and AlTiCrN) were prepared on 304 austenitic stainless steel substrates using multi-arc ion plating technique. The effects of different transition layers on the properties of Si-DLC were characterized by scanning electron microscopy, X-ray diffractometer, nanoindentation, confocal microscopy, Rockwell hardness tester, Raman test and wear test to find the optimal Si-DLC transition layer. The results show that the Si-DLC coating with AlTiSiN as the transition layer has an ID/IG of 0.71, the highest hardness of 26.7 Gpa, low surface roughness, the highest compressive stress, the best bond strength and the best wear resistance.

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WU, X. L., X. J. LI, X. ZHANG, W. B. XUE, G. A. CHENG et A. D. LIU. « TRIBOLOGICAL BEHAVIORS OF DUPLEX DLC/Al2O3 COATINGS FABRICATED USING MICRO-ARC OXIDATION AND FILTERED CATHODIC VACUUM ARC SYSTEM ». Surface Review and Letters 14, n^o 02 (avril 2007) : 193–97. http://dx.doi.org/10.1142/s0218625x07009256.

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Micro-arc oxidation technique (MAO) treatment produces a layer of alumina film on the surface of the aluminum alloy. A hard and uniform tetrahedral amorphous carbon film (diamond-like carbon, DLC) was deposited on the top of the alumina layer of the 2024 aluminum alloy by a pulsed filtered catholic vacuum arc (FCVA) deposition system with a metal vapor vacuum arc (MEVVA) source. The morphology and tribological properties of the duplex DLC/ Al 2 O 3 coating were investigated by a scanning electron microscope (SEM) and a ball-on-disk sliding tester. These results suggested that the duplex DLC/ Al 2 O 3 coating had good adhesion and a low friction coefficient, which improved significantly the wear resistance of aluminum alloys.

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Tillmann, Wolfgang, Evelina Vogli, Fabian Hoffmann et Patrick Kemdem. « Influence of Substrate Nitriding on Adhesion, Friction and Wear Resistance of DLC (Diamond-Like Carbon)-Coatings ». Key Engineering Materials 438 (mai 2010) : 211–18. http://dx.doi.org/10.4028/www.scientific.net/kem.438.211.

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Since diamond like carbon layers feature excellent mechanical and tribological behavior under defined environmental circumstances, they are well established in a wide field of industrial and automotive applications in the last decade. However, the pretreatment of the substrate plays also an important role in supporting and enforcing the excellent properties of the coatings. This work analyses the effect of the plasma nitrided cold working steel substrate (80CrV2) on the adhesion, friction and wear resistance of DLC-coatings and compares it to the performance of DLC-coatings applied on a non-hardened substrate material. Therefore the grinded and polished specimens were nitrogen-hardened in an Arc-PVD (Physical Vapor Deposition)-device before the DLC-coating was applied in a Magnetron Sputter-PVD-process. In order to measure the hardness of the thin film coating, a nanoindenter was used. The adhesion was tested with a scratch tester and the wear resistance was measured by using a Ball-on-disc-tester. A 3D-profilometer and a SEM (Scanning Electron Microscope) were utilized to analyze the scratches and wear tracks on the samples. With these results correlations between the substrate nitriding and the mechanical and tribological performance of the DLC-coating were made.

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Brzezinka, Tomasz, Jeff Rao, Jose Paiva, Joern Kohlscheen, German Fox-Rabinovich, Stephen Veldhuis et Jose Endrino. « DLC and DLC-WS2 Coatings for Machining of Aluminium Alloys ». Coatings 9, n^o 3 (15 mars 2019) : 192. http://dx.doi.org/10.3390/coatings9030192.

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Machine-tool life is one limiting factor affecting productivity. The requirement for wear-resistant materials for cutting tools to increase their longevity is therefore critical. Titanium diboride (TiB2) coated cutting tools have been successfully employed for machining of AlSi alloys widely used in the automotive industry. This paper presents a methodological approach to improving the self-lubricating properties within the cutting zone of a tungsten carbide milling insert precoated with TiB2, thereby increasing the operational life of the tool. A unique hybrid Physical Vapor Deposition (PVD) system was used in this study, allowing diamond-like carbon (DLC) to be deposited by filtered cathodic vacuum arc (FCVA) while PVD magnetron sputtering was employed to deposit WS2. A series of ~100-nm monolayer DLC coatings were prepared at a negative bias voltage ranging between −50 and −200 V, along with multilayered DLC-WS2 coatings (total thickness ~500 nm) with varying number of layers (two to 24 in total). The wear rate of the coated milling inserts was investigated by measuring the flank wear during face milling of an Al-10Si. It was ascertained that employing monolayer DLC coating reduced the coated tool wear rate by ~85% compared to a TiB2 benchmark. Combining DLC with WS2 as a multilayered coating further improved tool life. The best tribological properties were found for a two-layer DLC-WS2 coating which decreased wear rate by ~75% compared to TiB2, with a measured coefficient of friction of 0.05.

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Cao, Hongshuai, Fugang Qi, Xiaoping Ouyang, Nie Zhao, Yun Zhou, Beibei Li, Wenzhong Luo, Bin Liao et Jun Luo. « Effect of Ti Transition Layer Thickness on the Structure, Mechanical and Adhesion Properties of Ti-DLC Coatings on Aluminum Alloys ». Materials 11, n^o 9 (16 septembre 2018) : 1742. http://dx.doi.org/10.3390/ma11091742.

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Multilayers of Ti doped diamond-like carbon (Ti-DLC) coatings were deposited on aluminum alloys by filtered cathodic vacuum arc (FCVA) technology using C2H2 as a reactive gas. The effect of different Ti transition layer thicknesses on the structure, mechanical and adhesion properties of the coatings, was investigated by scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), nanoindentation and a scratch tester. The results showed that the Ti transition layer could improve interfacial transition between the coating and the substrate, which was beneficial in obtaining excellent adhesion of the coatings. The Ti transition layer thickness had no significant influence on the composition and structure of the coatings, whereas it affected the distortion of the sp2-C bond angle and length. Nanoindentation and scratch test results indicated that the mechanical and adhesion properties of the Ti-DLC coatings depended on the Ti transition layer thickness. The Ti transition layer proved favorable in decreasing the residual compressive stress of the coating. As the Ti transition layer thickness increased, the hardness value of the coating gradually decreased. However, its elastic modulus and adhesion exhibited an initial decrease followed by an increasing fluctuation. Among them, the Ti-DLC coating with a Ti transition layer thickness of 1.1 μm exhibited superior mechanical properties.

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Chekan, N. M., I. P. Akula, E. P. Shpak et A. N. Navitskii. « Structure and optical properties of diamond-like carbon coatings ». Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 63, n^o 3 (1 novembre 2018) : 280–89. http://dx.doi.org/10.29235/1561-8358-2018-63-3-280-289.

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Using a hybrid method of cathodic arc (PVD) and chemical (CVD) deposition from the gas phase, a new type of coatings containing high amount of sp3 bonds of carbon, capable of absorbing effectively light has been developed.This thin film material is a promised one for optical devices operating in open space environment as antireflective coating for photoreceiver bodies. The hybrid method permits to obtain effective light absorbing coatings having excellent mechanical and tribological properties and is able to sustain temperature cycling in a range from plus 150 to minus 100 oC. The optical characteristics of DLC coatings were studied depending on the content of sp2bound content. The combined physical and chemical deposition of DLC coatings allows to achieve a sufficiently high light absorption (a~10 5 cm–1) and low reflection with a relatively small coating thickness about 1 mm. It has been established that the antireflective properties of such coatings depend on the conditions for their preparation, first of all on hydrocarbon gas pressure

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Zhang, Jun, Bin He, Xin Li Wei et Zhen Wei Yuan. « Analyses of Adhesion Strength for DLC Coating-Silicon Structure ». Applied Mechanics and Materials 197 (septembre 2012) : 717–21. http://dx.doi.org/10.4028/www.scientific.net/amm.197.717.

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The adhesion strength of Diamond-like carbon (DLC) deposited onto silicon substrates using an arc-pulse sputtering technique was studied by experiments and numerical simulations. A scratch test was used to detect the adhesion strength of the DLC coating, which was simplified by two processes of tearing and peeling for FEA. The numerical simulations were performed by ABAQUS to calculate the two processes and integrate the result. The FEM simulation results fit with the scratch test. It is concluded that the simulation method is effusive and can be adopted to calculate the adhesion strength of DLC coating on the silicon substrate structure in other cases.

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Lukaszkowicz, Krzysztof, Justyna Wiśniewska, Agnieszka Paradecka et Paulina Borylo. « Characteristics of Hybrid Coating Deposited by PVD and PACVD Process ». Advanced Materials Research 1036 (octobre 2014) : 225–29. http://dx.doi.org/10.4028/www.scientific.net/amr.1036.225.

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Deposited on hot work tool steel substrate coating system composed of AlTiCrN film covered by diamond-like carbon (DLC)-based lubricant, was the subject of the studies. The AlTiCrN and DLC layers were deposited by PVD lateral rotating ARC-cathodes (LARC) and PACVD technology on the X40CrMoV5-1 respectively. This paper provides an analysis of the microstructure, mechanical and tribological properties. Several surface sensitive techniques and methods, i.e. High Resolution Transmission Electron Microscopy (HRTEM), Scanning Electron Microscopy (SEM), Raman spectroscopy and ball-on-disk were used to performed study of the coating. TEM investigation shows an amorphous character of DLC layer. It was found that tested AlTiCrN layer has nanostructural character with fine crystallites. In sliding dry friction conditions the friction coefficient for the investigated elements is set in the range between 0.02-0.04. The investigated coating reveals high wear resistance. The coating demonstrated good adhesion to the substrate.

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Shen, Yongqing, Jun Luo, Bin Liao, Lin Chen, Xu Zhang, Yuanyuan Zhao, Pan Pang et Xinmiao Zeng. « Enhanced Anti-Tribocorrosion Performance of Ti-DLC Coatings Deposited by Filtered Cathodic Vacuum Arc with the Optimization of Bias Voltage ». Coatings 12, n^o 5 (19 mai 2022) : 697. http://dx.doi.org/10.3390/coatings12050697.

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To improve the anti-tribocorrosion property, and decrease the metal dissolution and wear of stainless-steel components caused by the synergistic action of corrosion and friction in marine environments, Ti-DLC coatings were obtained on steel substrate using a filtered cathodic vacuum arc (FCVA) system by adjusting bias voltage. The structure, mechanical properties, corrosion, and tribocorrosion behavior were investigated. Increasing the bias voltage from −50 V to −300 V, Ti content decreased from 23.9 to 22.5 at.%, and grain size decreased first, and then increased. Obvious TiC grains embedded in the amorphous carbon matrix were observed in the coating from the TEM result. Hardness increased from 30.23 GPa to 34.24 GPa with an increase in bias voltage from −50 to −200 V. The results of tribocorrosion testing showed that the Ti-DLC coatings at −200 V presented the best anti-tribocorrosion performance with the smallest friction coefficient of 0.052, wear rate of 2.48 × 10−7 mm3/N∙m, and high open-circuit potential, which is mainly due to the dense structure, high value of H/E* and H3/E*2, and great corrosion resistance. Obtained results suggest that the Ti-DLC coating with nanocomposite structure is a potential protective material for marine equipment.

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Song, Jae-Sil, Yong Seob Park et Nam-Hoon Kim. « Hydrophobic Anti-Reflective Coating of Plasma-Enhanced Chemical Vapor Deposited Diamond-Like Carbon Thin Films with Various Thicknesses for Dye-Sensitized Solar Cells ». Applied Sciences 11, n^o 1 (1 janvier 2021) : 358. http://dx.doi.org/10.3390/app11010358.

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Diamond-like carbon (DLC) thin films, prepared by a radio frequency plasma-enhanced chemical vapor deposition (PECVD) system, were investigated for application as an anti-reflective coating (ARC) for dye-sensitized solar cells (DSSCs) with a change in film thickness. The strength of the Raman spectrum, G-peak position, and ID/IG ratio, related to sp3 bonds in the DLC thin films, is directly attributed to some tribological properties including surface roughness, hardness, elastic modulus, friction coefficient, and contact angle. Some optical properties, such as transmittance, refractive index, and absorption coefficient, were examined after changing the thickness of DLC thin films. The optimal short-circuit current density (Jsc), open-circuit voltage (Voc), and fill factor (FF) values were obtained for the significantly improved conversion efficiency (CE) from 4.92% to 5.35% in the 60 nm thick PECVD DLC ARC for DSSCs with hard and hydrophobic surfaces.

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Dong, Chuang He, Xiu Ting Wei, Zhi Yong Li, Wei Liang Shi et Zhi Gang Wang. « Experimental Study on Surface Element Composition and Hydrophobic Properties of DLC Coating ». Key Engineering Materials 764 (février 2018) : 58–67. http://dx.doi.org/10.4028/www.scientific.net/kem.764.58.

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Precision rubber mold is an extremely important basic process equipment in industrial production, however, there are some classic problems, such as viscose, coke accumulation and difficult demoulding, can not be effectively resolved. In order to solve this problem, in this paper, a new process of preparing high performance DLC coated precision rubber mold is proposed by using the excellent anti-sticking properties, self-cleaning properties and hydrophobic properties of DLC coating. In the experiment, steel ( S35C ) substrate with the same material as tire mold is used. Hydrophobic of DLC coating surface mainly depends on the surface element composition and the roughness. All the substrates are exactly processed, so as to ensure that the roughness has minimal impact on hydrophobic. Plasma enhanced chemical vapor deposition (PECVD) technology is employed to prepare fluorine doped diamond-like carbon (F-DLC) coating and hydrogenated diamond-like carbon (a-C:H) coating. Arc ion plating (AIP) technology is applied to produce Non-hydrogenated diamond-like carbon (a-C) coating. The coating is deposited on the surface of steel ( S35C ). Then, the roughness, the element composition and the hydrophobicity of the prepared coating are tested. Experimental results demonstrate that the water contact angle of a-C coating only 73.8 degrees, water contact angle of a-C:H coating up to 80.16 degrees, however, water contact angle of F-DLC coating could reach to 89.01 degrees, meanwhile, the surface energy can be reduced to 22.62 mN/m. To some extent, the hydrophobicity of the coating enhances with the increase of H content, and the content of weak polarization group CF2 becomes stable with the incorporation of F element. As a consequence, the surface of coating becomes smoother and the wettability of coating and water becomes poorer, therefore the performance of hydrophobic of the coating is further enhanced.

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Kiryukhantsev-Korneev, Philipp, Alina Sytchenko, Alexander Sheveyko, Dmitry Moskovskikh et Stepan Vorotylo. « Two-Layer Nanocomposite TiC-Based Coatings Produced by a Combination of Pulsed Cathodic Arc Evaporation and Vacuum Electro-Spark Alloying ». Materials 13, n^o 3 (23 janvier 2020) : 547. http://dx.doi.org/10.3390/ma13030547.

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A novel two-stage technology combining vacuum electro-spark alloying (VESA) and pulsed cathodic arc evaporation (PCAE) was approbated for the deposition of TiC-based coatings in inert (Ar) and reactive (C2H4) atmospheres. The deposition was carried out using a TiC-NiCr-Eu2O3 electrode and 5140 steel substrates. Structural, elemental, and phase compositions of the deposited coatings were investigated by scanning electron microscopy, energy-dispersive spectrometry, and X-ray diffraction. The mechanical properties of the coatings were measured by nanoindentation using a 4 mN load. The tribological properties of the coatings were measured using the pin-on-disc setup in air and in distilled water at a 5 N load. The experimental data suggest that VESA coatings are characterized by surface defects, a hardness of 12.2 GPa, and a friction coefficient of 0.4. To ensure good adhesion between the VESA coating and the upper layer containing diamond-like carbon (DLC), an intermediate layer was deposited by PCAE in the Ar atmosphere. The intermediate layer had a hardness of up to 31 GPa. The upper layer of the coating ensured a low and stable friction coefficient of 0.2 and high wear resistance due to the formation of an sp2–sp3 bound carbon phase. Multilayer TiC-based coating with the upper DLC layer, in addition to high tribological properties, was characterized by the lowest corrosion current density (12 μA/cm2).

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Goreninskii, Semen, Yuri Yuriev, Artem Runts, Elisaveta Prosetskaya, Evgeniy Melnik, Tuan-Hoang Tran, Elizaveta Sviridova, Alexey Golovkin, Alexander Mishanin et Evgeny Bolbasov. « Nitrogen-Doped Diamond-like Coatings for Long-Term Enhanced Cell Adhesion on Electrospun Poly(ε-caprolactone) Scaffold Surfaces ». Polymers 16, n^o 24 (18 décembre 2024) : 3524. https://doi.org/10.3390/polym16243524.

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Electrospun poly(ε-caprolactone) (PCL)-based scaffolds are widely used in tissue engineering. However, low cell adhesion remains the key drawback of PCL scaffolds. It is well known that nitrogen-doped diamond-like carbon (N-DLC) coatings deposited on the surface of various implants are able to enhance their biocompatibility and functional properties. Herein, we report the utilization of the pulsed vacuum arc deposition (PVAD) technique for the fabrication of thin N-DLC coatings on the surface of electrospun PCL scaffolds. The effect of N-DLC coating deposition under various nitrogen pressures on the morphological, mechanical, physico-chemical, and biological properties of PCL scaffolds was investigated. It was established that an increase in nitrogen pressure in the range from 5 × 10−3 to 5 × 10−1 Pa results in up to a 10-fold increase in the nitrogen content and a 2-fold increase in the roughness of the PCL fiber surface. These factors provided the conditions for the enhanced adhesion and proliferation of human mesenchymal stem cells (MMSCs) on the surface of the modified PCL scaffolds. Importantly, the preservation of N-DLC coating properties determines the shelf life of a coated medical device. The elemental composition, tensile strength, and surface human MMSC adhesion were studied immediately after fabrication and after 6 months of storage under normal conditions. The enhanced MMSC adhesion was preserved after 6 months of storage of the modified PCL-based scaffolds under normal conditions.

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Binjua, Decelyne Elly, Seock-Sam Kim, Young-Jun Jang et Jong-Kuk Kim. « Friction and Wear Mechanisms of Cu/ta-C Coatings Under PAO-4 and PAO-4 with MoDTC Lubrication ». Journal of Engineering Advancements 01, n^o 04 (décembre 2020) : 183–87. http://dx.doi.org/10.38032/jea.2020.04.009.

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The tribological behavior of various types of DLC coatings in formulated and non-formulated lubricants are needed for proper usage of these coatings. In this research, the friction and wear mechanism of four different DLC coatings in poly-alpha-olefin type 4 (PAO-4) with and without MoDTC were investigated using ball-on-disc tribometer. One ta-C (tetrahedral amorphous carbon) and three Cu/ta-C (copper doped ta-C) with different sputter power of 50 W, 150 W, and 200 W coatings were deposited on silicon wafers by using FCVA (filtered cathodic vacuum arc) technique for this research. The results indicate that ta-C coating on silicon wafer has the lowest average friction coefficient (CoF) and better wear resistance than Cu/ta-C coating when lubricated under PAO-4 oil with MoDTC. Cu/ta-C with sputter powers of 150 W and 200 W exhibited the highest average friction coefficient under PAO-4 oil with MoDTC. Meanwhile, the average CoF for all samples were similar under PAO-4 base oil. In terms of wear, ta-C coating showed the highest wear rate under PAO-4 base oil then followed by Cu/ta-C with sputter power of 50 W. Nonetheless, Cu/ta-C with sputter powers of 150 W and 200 W exhibited significantly low wear rate under PAO-4 base oil compared to PAO-4 oil with MoDTC.

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Yuriev, Yuri, Semen Goreninskii, Artem Runts, Elisaveta Prosetskaya, Evgenii Plotnikov, Darya Shishkova, Yulia Kudryavtseva et Evgeny Bolbasov. « DLC-Coated Ferroelectric Membranes as Vascular Patches : Physico-Chemical Properties and Biocompatibility ». Membranes 11, n^o 9 (7 septembre 2021) : 690. http://dx.doi.org/10.3390/membranes11090690.

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In this paper, the results on the fabrication of ferroelectric membranes as vascular patches with modified surfaces are presented. For the modification of a membrane surface contacting blood, DLC coating was deposited using the pulsed vacuum arc deposition technique. The physico-chemical properties and cytotoxicity of the membranes modified under various conditions were studied. It was found that DLC coatings do not affect membrane microstructure, preserving its crystal structure as well as its high strength and elongation. It was revealed that an increase in the capacitor storage voltage results in the rise in sp2- and sp-hybridized carbon concentration, which makes it possible to control the chemical structure and surface energy of the modified surface. The experiments with 3T3L1 fibroblasts showed no toxic effects of the materials extracts.

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Paradecka, Agnieszka, Krzysztof Lukaszkowicz et Mirosława Pawlyta. « Structure and tribological properties of DLC:Si/AlCrN low friction thin film ». MATEC Web of Conferences 252 (2019) : 08002. http://dx.doi.org/10.1051/matecconf/201925208002.

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A wide range of diamond-like carbon coatings is caused by their structure composed of sp2 and sp3 carbon hybridisation and the possibility of both metallic and non-metallic admixtures or the creation of a hydrogenated form. One of the ways to improve the tribological properties of DLC is to dope it with silicon. Deposited on stainless steel substrate coating system composed of AlCrN film covered by DLC:Si was the subject of the studies. The AlCrN and DLC:Si layers were deposited by PVD lateral rotating ARC-cathodes and PACVD on the X6CrNiMoTi17-12-2 steel respectively. Characteristics of DLC:Si film was performed by imaging the topography using SEM and AFM. The structure was investigated using a Raman spectroscopy and HRTEM. Tribological and adhesion tests were carried out using a ball-on-disc and a scratch test respectively. Tests using the TEM confirmed an amorphous character of DLC:Si layer. A phase composition analysis of the DLC:Si layer with the Raman spectroscopy method showed the presence of bonds distinctive for diamond (sp3) and graphite (sp2), typically observed in DLC coatings. Under the technically dry friction conditions, the friction coefficient for the associations tested is within the range 0.14 for the investigated coating.

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Cai, Yao, Huidong Liu, Ye Ma, Qiang Wan, Hao Chen, Yan Liu, Yanming Chen, Qingsong Mei et Bing Yang. « Effect of Ion Source Current on the Microstructure and Properties of Cr-DLC Coatings Prepared by Ion Beam-Assisted Arc Ion Plating ». Nano 12, n^o 05 (7 mars 2017) : 1750053. http://dx.doi.org/10.1142/s1793292017500539.

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Cr-containing diamond-like carbon (Cr-DLC) nanocomposite coatings were synthesized by ion beam-assisted arc ion plating with varying hollow cathode ion source (HCIS) currents. The morphologies, compositions and microstructures were characterized by scanning electronic microscopy (SEM), atomic force microscopy (AFM), X-Ray photoelectron spectrometer (XPS), Raman spectroscopy, grazing incidence X-ray diffraction (GIXRD) and high-resolution transmission electron microscopy (HRTEM). Hardness and friction coefficient were investigated by using nanoindentation and ball-on-disc tribometer, respectively. With no HCIS current, the coating exhibits the maximal growth rate and a rough surface, as well as lower hardness and elastic modulus. With the increasing HCIS current from 40[Formula: see text]A to 80[Formula: see text]A, the growth rate and the content of chromium carbide decrease obviously, the [Formula: see text]/[Formula: see text] ratio increases initially to the maximum at the HCIS current of 60[Formula: see text]A, the highest hardness and elastic modulus are obtained at the HCIS current of 50[Formula: see text]A. It is also revealed that moderate HCIS current can reduce surface roughness obviously and promote tribological properties. The correlation of the HCIS current with the microstructure and performance of Cr-DLC coating has been established.

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Hsu, Cheng Hsun, Jung Kai Lu et Ming Li Chen. « Study on Characteristics of ADI Coated DLC/ TiN /TiAlN Coatings by Cathodic Arc Evaporation ». Solid State Phenomena 118 (décembre 2006) : 257–64. http://dx.doi.org/10.4028/www.scientific.net/ssp.118.257.

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In this study, austempered ductile iron (ADI) substrate containing acicular ferrite and high-carbon austenite in the microstructure is made by austempering treatment at 360. Cathodic arc evaporation (CAE) coating technique was used to coat DLC, TiN and TiAlN films on ADI for surface modification. The results showed that the three coatings could be successfully coated onto ADI through CAE process without altering the unique microstructure of ADI. The structures of the coatings were identified by XRD, Raman and TEM, respectively. After HRC indentation testing, it was found that nodular graphite was the initial site of cracking for the coatings and then peeled. Surface roughness of all coated specimens was increased because the droplets generated on the substrate surface during the CAE process. Coated ADI had better wearability performance than uncoated ADI due to higher surface hardness. Coated specimens exhibited higher corrosion resistance than uncoated ones when they were immersed in separate solutions of both 3.5 wt. % NaCl and 10 vol. % HCl. In particular, TiAlN had the best corrosion resistance among the coated specimens.

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Yao, Jian-tao, Sheng Wang, Yong Zhou et Hui Dong. « Effects of the Power Supply Mode and Loading Parameters on the Characteristics of Micro-Arc Oxidation Coatings on Magnesium Alloy ». Metals 10, n^o 11 (30 octobre 2020) : 1452. http://dx.doi.org/10.3390/met10111452.

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Micro-arc Oxidation (MAO) is a technology for non-ferrous metal surface treatment through growth ceramic coating in situ. To determine the influence of the power supply mode and the loading parameters on the film forming of magnesium alloy micro-arc oxidation processing, the different power supply modes of pulsed direct current DC, pulsed bipolar current (BC) and the pulsed with a discharge loop current (DLC) was used with MAO technology on the AZ91D magnesium alloy. The power load parameters were optimized. The average energy consumption was calculated. Results showed that the role of the negative voltage in the bipolar pulse power supply is to restrain the large arc tendency. Under the pulse power supply with a discharge loop, the current and energy consumption decreases with the increase of the discharge resistance at the same pulse parameters. The big arc phenomenon can be effectively avoided and the impact of load capacitance could be effectively avoided by using the pulse power supply with a discharge loop. Moreover, the processing of the micro-arc oxidation is stable, the arc point is uniform, the surface of the film is smooth, the hole is uniform and the coating is dense, and the film efficiency is improved effectively.

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Zur I. A., Shmanay Y. E., Fedotova J. A., Kharchanka A. A. et Movchan S. A. « Effect of the thickness on electrical resistance of thin diamond-like carbon coatings on silicon substrate ». Physics of the Solid State 65, n^o 1 (2023) : 47. http://dx.doi.org/10.21883/pss.2023.01.54973.457.

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The relationship between sp2/sp3-hybridizations ratio of atomic bonds in diamond-like carbon ( DLC --- Diamond-Like Carbon) and its electrical resistivity for coatings with a thickness in the range 22-70 nm prepared by vacuum arc deposition on silicon substrate of the KDB-8 brand has been established. It is established, that an increase in the coating thickness from 22 to 70 nm is accompanied by a decrease in the specific transverse electrical resistance of samples from 17 to 2 GΩ·m. This effect is explained by an increase in the proportion of carbon atoms with sp2-hybridization of electronic orbitals from 86 to 91%, which leads to the appearance of an additional number of π-bonds. A mathematical model, describing the spatial distribution of current when measuring transverse I-V characteristic, has been developed. The results obtained will be useful in creating resistive layers on the electrodes of gas-discharge detectors of charged particle to limit the amount of current in the event of rare spark discharges inside them caused by the registration of random highly ionizing particles. Keywords: ( DLC), electrical properties of thin films, hybridization of electronic orbitals, Raman scattering, I-V characteristic.

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Meng, Xiaobo, Wei Zhang, Shizhong Wei, Kunming Pan, Xiaodong Wang, Tao Jiang, Xiran Wang et al. « Tribological Properties of 7A04 Aluminum Alloy Enhanced by Ceramic Coating ». Lubricants 12, n^o 11 (7 novembre 2024) : 384. http://dx.doi.org/10.3390/lubricants12110384.

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The 7A04 Al alloy is a commonly used lightweight metal material; however, its low wear resistance limits its application. In this study, the wear resistance of this alloy was improved by preparing micro-arc oxidation (MAO) coatings, MAO/MoS2 composite coatings, and hard-anodized (HA) coatings on its surface. The friction and wear behaviors of these three coatings with diamond-like coated (DLC) rings under oil lubrication conditions were investigated using a ring–block friction tester. The wear rates of the coatings on the block surfaces were determined using laser confocal microscopy, and the wear trajectories of the coatings were examined using scanning electron microscopy. The results indicated that, among the three coatings, the MAO/MoS2 coating had the lowest coefficient of friction of 0.059, whereas the HA coating had the lowest wear rate of 1.47 × 10−6 mm/Nm. The MAO/MoS2 coatings exhibited excellent antifriction properties compared to the other coatings, whereas the HA coatings exhibited excellent anti-wear properties. The porous structure of the MAO coatings stored lubricant and replenished the lubrication film under oil lubrication. Meanwhile, the introduced MoS2 enhanced the densification of the coating and functioned as a solid lubricant. The HA coating exhibited good wear resistance owing to the dense structure of the amorphous-phase aluminum oxide. The mechanisms of abrasive and adhesive wear of the coatings under oil lubrication conditions and the optimization of the tribological properties by the solid–liquid synergistic lubrication effect were investigated. This study provides an effective method for the surface modification of Al alloys with potential applications in the aerospace and automotive industries.

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Polityko, K. N., I. V. Kolesnikov et D. S. Manturov. « Analysis of Technologies for Applying High-Entropy Coatings by Physical Deposition Method ». Advanced Engineering Research (Rostov-on-Don) 24, n^o 4 (25 décembre 2024) : 369–91. https://doi.org/10.23947/2687-1653-2024-24-4-369-391.

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Introduction. Modern tribology solves the problems of increasing the reliability of friction units through applying vacuum wear-resistant coatings by the physical vapor deposition (PVD) method. More than five thousand scientific papers are devoted to high-entropy alloys (HEA). However, an urgent question about the possibility of obtaining wear-resistant and antifriction high-entropy coatings (HEC) using the PVD method remains unsolved. Its solution opens up the possibility of using HEC in mechanical engineering. The presented article is intended to fill this gap. Research objectives are as follows: to identify the key results on the creation of HEC by such PVD methods as vacuum arc evaporation and magnetron sputtering, to establish tribological characteristics of PVD coatings.Materials and Methods. From November 2023 to February 2024, the authors analyzed materials published in the Web of Science, Elibrary, Scopus, Medline, CINAHL databases in the Russian and English languages.Results. At the first stage, the literature on the vacuum arc coating method was considered. The issues of creating a vacuum arc discharge, its technological features, disadvantages, as well as processes in the cathode region of the arc were studied. The conditions of existence of cathode spots, the influence of temperature on the erosion coefficient, and processes on the anode and substrate were noted. The dependence of the deposition rate on the value of the potential on the substrate was shown. Nitride and combined coatings obtained by vacuum-arc method were analyzed: TiN, TiCN, TiAlN, TiMoS, TiSiN, TiN/VN, TiAlN/DLC-Ti. At the second stage, the history of the magnetron sputtering method was presented; technological features, types of magnetrons and nitride coatings obtained in this way were described. The third stage was devoted to the five-stage process of forming the coating structure. Island, layer-by-layer, and mixed growth modes of coating were considered. A schematic representation of the fundamental processes of structure formation was given. Defects in vacuum coatings were noted. At the fourth stage, the HEC based on the HEA were presented. Parameters predicting the formation of a HEA solid solution were indicated. Six families of high-entropy alloys were considered. Modern high-entropy coatings obtained by vacuum arc and magnetron methods were evaluated. The results of studies of structural-phase and physico-mechanical properties were summarized in the form of a table. The data of tribological studies of high-entropy coatings were presented.Discussion and Conclusion. The literature on HEC describes the coating structure, physical and mechanical properties, and thermal stability. The authors of the presented article found a gap in the research of tribology of high-entropy coatings. From the known results, it can be concluded that these coatings are frictional. However, due to their high hardness and ductility, they exhibit high wear resistance. In addition, it is difficult to talk about their tribological purpose. To solve the issue of the possibility of using PVD coatings in mechanical engineering, attention should be paid to the development of compositions with high hardness, wear resistance, and low coefficient of friction. They can be operated in tribo-loaded nodes.

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Černý, Ivo, et Dagmar Mikulová. « Fatigue Resistance and Crack Initiation Mechanisms in Nitrided Steel Treated with Selected Types of Surface Coating ». Materials Science Forum 730-732 (novembre 2012) : 203–8. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.203.

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Surface treatment processes are usually applied to improve surface characteristics and resistance. Particularly duplex processes like nitriding combined with nanostructured based coatings are considered as the most advanced ones, with a large application potential in automotive industry. An example is an application in gear wheels, where fatigue loading in gear teeth roots exists besides contact fatigue on teeth sides. Contact fatigue, has to be therefore well balanced with pure fatigue resistance. Some surface treatments leading to excellent contact properties, wear resistance and extremely low friction coefficient may reduce resistance to pure fatigue crack initiation and subsequent growth to premature failure. In the paper, results of an experimental programme aimed at evaluation of fatigue resistance at repeated loading of nitrided steel after application of two types of coating, (i) nanostructured C-layer deposited by a modified cathodic arc technique according to Microcoat patent and (ii) Cr-WC:H-DLC layer produced according to Hauzer patent [1], are presented and discussed. Fatigue tests were carried out using small samples with 2.1 mm diameter, with nitrided layer of 0.35 mm thickness. Tests were completed with fractographical analyses of initiation areas. Results and analyses showed that coating effects depended on the specific technology and parameters. The Cr-WC:H-DLC layer affected fatigue limit favourably unlike the Microcoat C-layer, which resulted in reduction of fatigue strength. A detailed analysis of recorded data during static tensile tests indicated an occurrence of significant surface and subsurface residual stresses with a strong possible effect on fatigue crack initiation mechanisms. A significant, unfavourable effect of inclusions in the subsurface layer was demonstrated.

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Lukaszkowicz, Krzysztof, Eva Jonda, Jozef Sondor, Katarzyna Balin et Jerzy Kubacki. « Characteristics of the AlTiCrN+DLC coating deposited with a cathodic arc and the PACVD process ». Materiali in tehnologije 50, n^o 2 (5 avril 2016) : 175–81. http://dx.doi.org/10.17222/mit.2014.104.

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Lukaszkowicz, Krzysztof, Jozef Sondor, Katarzyna Balin et Jerzy Kubacki. « Characteristics of CrAlSiN+DLC coating deposited by lateral rotating cathode arc PVD and PACVD process ». Applied Surface Science 312 (septembre 2014) : 126–33. http://dx.doi.org/10.1016/j.apsusc.2014.03.024.

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Зур, И. А., Е. Е. Шманай, Ю. А. Федотова, А. А. Харченко et С. А. Мовчан. « Влияние толщины на удельное электросопротивление тонких покрытий из алмазоподобного углерода на кремнии ». Физика твердого тела 65, n^o 1 (2023) : 49. http://dx.doi.org/10.21883/ftt.2023.01.53922.457.

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The relationship between sp^2/sp^3 hybridizations ratio of atomic bonds in diamond-like carbon (DLC) and its electrical resistivity for coatings with a thickness in the range 22-70 nm prepared by vacuum arc deposition on silicon substrate of the SHB-8 brand has been established. It is established, that an increase in the coating thickness from 22 to 70 nm is accompanied by a decrease in the specific transverse electrical resistance of samples from 17 to 2 GOhm·m. This effect is explained by an increase in the proportion of carbon atoms with sp^2 hybridization of electronic orbitals from 86 to 91%, which leads to the appearance of an additional number of π-bonds. A mathematical model, describing the spatial distribution of current when measuring transverse I-V characteristic, has been developed. The results obtained will be useful in creating resistive layers on the electrodes of gas-discharge detectors of charged particle to limit the amount of current in the event of rare spark discharges inside them caused by the registration of random highly ionizing particles.

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Lan, Rui, Zhifeng Ma, Chunji Wang, Guoying Lu, Yanyan Yuan et Changlun Shi. « Microstructural and tribological characterization of DLC coating by in-situ duplex plasma nitriding and arc ion plating ». Diamond and Related Materials 98 (octobre 2019) : 107473. http://dx.doi.org/10.1016/j.diamond.2019.107473.

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Soranansri, Panuwat, André Dubois, Philippe Moreau, Tatsuya Funazuka, Kuniaki Dohda et Laurent Dubar. « Initial and grow-up stages of material transfer on Arc-DLC coating in aluminum forming processes at high temperatures ». Wear 556-557 (novembre 2024) : 205491. http://dx.doi.org/10.1016/j.wear.2024.205491.

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Bonu, Venkataramana, G. Srinivas, V. Praveen Kumar, Anjana Joseph, Chandrabhas Narayana et Harish C. Barshilia. « Temperature dependent erosion and Raman analyses of arc-deposited H free thick DLC coating on Cr/CrN coated plasma nitrided steel ». Surface and Coatings Technology 436 (avril 2022) : 128308. http://dx.doi.org/10.1016/j.surfcoat.2022.128308.

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Torkghashghaei, Maryam, William Shaffer, Bruna Ugulino, Rémi Georges, Roger E. Hernández et Carl Blais. « Improvement of the Wear Resistance of Circular Saws Used in the First Transformation of Wood through the Utilization of Variable Engineered Micro-Geometry Performed on PVD-Coated WC-Co Tips ». Applied Sciences 12, n^o 23 (29 novembre 2022) : 12213. http://dx.doi.org/10.3390/app122312213.

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Reduced performance of circular saws due to premature chipping of their teeth has been a critical issue in woodcutting industry for many years. This research examined the impact of surface coating and variable engineered micro-geometry of the cutting edges of carbide teeth (tips) on the wear resistance of circular saws used in primary wood processing. CrN/CrCN/DLC, CrN/AlTiN, CrN/CrCN, and CrCN/TiSiCN were deposited on tungsten carbide-cobalt (WC-Co) substrates using the cathodic arc evaporation technique. The CrN/CrCN coating proved to be the one with highest wear resistance and adhesion among those studied. No sign of delamination was observed around the indentation of the CrN/CrCN coating after the adhesion test. Furthermore, no abrasion, delamination or crack was observed on the surface of the CrN/CrCN coating after the three-body abrasion wear test. The results of the dry-sliding wear test revealed that CrN/CrCN coating significantly decreased the wear rate of WC-Co substrates by 74%, 66% and 77% at sliding speeds of 50, 100 and 250 mm/s, respectively. Afterwards, a CrC/CrCN coating was deposited on the teeth of conventional circular saws. Next, the cutting edges of teeth were modified through variable engineered micro-geometry. Tests were conducted at a sawmill with three series of saws: 1-coated and edge-modified, 2-coated and conventional edge geometry, and 3-uncoated and edge-modified. Wood processing was performed during two shifts of 480 min each. The width of the wear land was the criterion used as the wear index. The results of industrial tests showed that saws with edge-modified teeth had significantly less chipping and no breakage at their corners compared to the saw without edge modification (conventional saw). After 480 min of sawing, the wear rate of the coated saw with edge modification decreased by 46% and 16%, compared to the coated saw without edge modification and the uncoated saw with edge-modified teeth, respectively. Those values reached 73 % and 41%, respectively, after 960 min of sawing. The study shows that by optimizing the surface chemistry and the geometry of the cutting edge of WC-Co tips, tool life can be significantly increased therefore reducing downtime due to saw replacement and resharpening, thus significantly increasing productivity in the first transformation of wood.

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Contulov, Mirela, Rodica Vladoiu, Aurelia Mandes, Victor Ciupina et Vilma Buršíková. « Surface Engineering of the Hydrogenated DLC (a-C:H) Coatings with Optimized Mechanical Performance ». Advanced Materials Research 816-817 (septembre 2013) : 33–37. http://dx.doi.org/10.4028/www.scientific.net/amr.816-817.33.

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The aim of this contribution is to present the properties of the hydrogenated DLC (a-C:H) films and to study their growth carried out in a special deposition technique based on Gaseous Thermionic Vacuum Arc (G-TVA) method. The mechanical properties were investigated on cross-sectional samples using the Fischerscope HM 2000 depth sensing indentation (DSI) tester.

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Hou, Qingyan, Pan Pang, Yifan Zhang, Xu Zhang, Bin Liao, Lin Chen et Xiaoyue Jin. « Thick Tetrahedral Amorphous Carbon Films Deposited by Filtered Cathodic Vacuum Arc ». Coatings 15, n^o 2 (18 février 2025) : 241. https://doi.org/10.3390/coatings15020241.

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High-quality diamond-like carbon (DLC) films are renowned for their exceptional hardness, low friction coefficient, and superior chemical stability. These properties make DLC films exceptionally suitable for protective coatings in optical, mechanical, aerospace, and military applications. Thick DLC films with outstanding mechanical properties were deposited on DC53 die steel using a mixed energy carbon plasma generated by a filtered cathodic vacuum arc (FCVA) device. The structural, mechanical, tribological, and optical properties of the films were tested by Raman, surface morphology instrument, Vickers Indenter, tribometer, and UV-VIS spectrophotometry. The results indicated that 14 µm tetrahedral amorphous carbon (ta-C) films with a good combination with DC53 die steel substrate were obtained. The hardness was 9415 HV, which is close to that of diamond films. The fracture toughness was 4 MPa·m1/2. The friction coefficient was 0.0898, and the optical band gap was 3.12 eV.

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Lungu, C. P., I. Mustata, G. Musa, V. Zaroschi, Ana Mihaela Lungu et K. Iwasaki. « Low friction silver-DLC coatings prepared by thermionic vacuum arc method ». Vacuum 76, n^o 2-3 (novembre 2004) : 127–30. http://dx.doi.org/10.1016/j.vacuum.2004.07.002.

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ZENG, DAN, NANYU MA, YUJIE HUANG, ZHENYI FEI, MUSEN LI, JUNWEI DI et MIN WANG. « STUDY ON THE PREPARATION OF DLC FILMS DEPOSITED ON SILVER NANOPARTICLES AND THE SENSITIVITY OF LSPR INTERFACE ». Surface Review and Letters 20, n^o 03n04 (août 2013) : 1350024. http://dx.doi.org/10.1142/s0218625x13500248.

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Diamond-like carbon (DLC) films were deposited on the surface of silver nanoparticles (NPs) using two different sets of technology parameters by radio-frequency magnetron arc plasma enhanced chemical vapor deposition (PECVD) in this paper. The probe profilometer, SEM, AFM, Raman spectroscopy, XPS and UV–vis spectrophotometer were used to characterize the film thickness, microstructure, composition and sensing performance. Results showed that the basic vacuum degree had a greater influence on the properties of DLC films than that of RF forward power. The LSPR interface prepared in short time had sensing performance, but the sensitivity decreased with the thickness of DLC films increase. DLC films of higher sp3 bonds content can slow down the decline rate of the sensitivity caused by increasing of the film thickness.

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Zhou, Bing, Xiao Hong Jiang, A. V. Rogachev et Rui Qi Shen. « Effects of Copper Interlayer and Annealing on Structure and Mechanical Properties of Diamond-Like Carbon Films by Cathode Arc Evaporation ». Advanced Materials Research 629 (décembre 2012) : 25–31. http://dx.doi.org/10.4028/www.scientific.net/amr.629.25.

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Diamond-like carbon (DLC) bilayer films with Cu interlayer were prepared on silicon substrate by direct-current and pulsed cathode arc plasma technique, and annealed at various temperatures in vacuum. Structure, morphology and mechanical properties of the bilayer films were investigated by Raman spectroscopy, Auger electron spectroscopy, scanning electron microscopy and atomic force microscopy, surface profilometer and Vickers sclerometer. The results show that Cu interlayer changes the bilayer microstructure, including the thickness and element distribution of diffusion layer, the relative fraction of sp3/sp2bonding and growth model of bilayer. A simple three-layer model was used to describe the interdiffusion between Cu and C layer. Cu interlayer could be more effective against graphitization upon annealing. Morphological characteristics of the films were studied by analyzing the surface features of substrate. Cu/DLC bilayer exhibits highly dispersed nano-agglomerates with smaller size on the surface due to low surface energy of Cu interlayer. The stress and hardness of the films were affected accordingly. Cu/DLC bilayer shows a relatively high hardness at low annealing temperature but the stress almost no change. By changing Cu interlayer and annealing temperature, excellent DLC films could be designed for the protective, hard, lubricating and wear resistant coatings on mechanical, electronic and optical applications.

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Alakoski, Esa, Mirjami Kiuru et Veli-Matti Tiainen. « A simplified arc discharge set-up for high adhesion of DLC coatings ». Diamond and Related Materials 15, n^o 1 (janvier 2006) : 34–37. http://dx.doi.org/10.1016/j.diamond.2005.06.026.

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Lux, Helge, Matthias Edling, Massimiliano Lucci, Julia Kitzmann, Claus Villringer, Peter Siemroth, Fabio De Matteis et Sigurd Schrader. « The Role of Substrate Temperature and Magnetic Filtering for DLC by Cathodic Arc Evaporation ». Coatings 9, n^o 5 (27 mai 2019) : 345. http://dx.doi.org/10.3390/coatings9050345.

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Diamond-like carbon (DLC) films were deposited using two different types of high current arc evaporation. The first process used a magnetic particle filter to remove droplets from the plasma. For the second process, the samples were put into a metallic cage which was placed directly above the plasma source. For both processes, we varied the substrate temperature from 21 to 350 °C in order to investigate the temperature effect. The samples were characterized using SEM, AFM, XPS, Raman Spectroscopy, Ellipsometry, Photometry, and Nano Indentation in order to compare both methods of deposition and provide a careful characterization of such DLC films. We found that the sp3 content and the hardness can be precisely adjusted by changing the substrate temperature. Furthermore, in the case of unfiltered deposition, the optical constants can be shifted in the direction of higher absorbance in order to produce black and hard carbon coatings.

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Orrit-Prat, Jordi, Raül Bonet, Elisa Rupérez, Miquel Punset, Mónica Ortiz-Hernández, Jordi Guillem-Marti, Arturo Lousa et al. « Bactericidal silver-doped DLC coatings obtained by pulsed filtered cathodic arc co-deposition ». Surface and Coatings Technology 411 (avril 2021) : 126977. http://dx.doi.org/10.1016/j.surfcoat.2021.126977.

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Wang, R. Y., L. L. Wang, H. D. Liu, S. J. Yan, Y. M. Chen, D. J. Fu et B. Yang. « Synthesis and characterization of CrCN–DLC composite coatings by cathodic arc ion-plating ». Nuclear Instruments and Methods in Physics Research Section B : Beam Interactions with Materials and Atoms 307 (juillet 2013) : 185–88. http://dx.doi.org/10.1016/j.nimb.2013.04.040.

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Castillo, H. A., E. Restrepo-Parra et P. J. Arango-Arango. « Chemical and morphological difference between TiN/DLC and a-C:H/DLC grown by pulsed vacuum arc techniques ». Applied Surface Science 257, n^o 7 (janvier 2011) : 2665–68. http://dx.doi.org/10.1016/j.apsusc.2010.10.039.

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Shen, Yongqing, Jun Luo, Bin Liao, Xu Zhang, Yuanyuan Zhao, Xinmiao Zeng, Lin Chen, Pan Pang et Fang Bao. « Tribocorrosion and tribological behavior of Ti-DLC coatings deposited by filtered cathodic vacuum arc ». Diamond and Related Materials 125 (mai 2022) : 108985. http://dx.doi.org/10.1016/j.diamond.2022.108985.

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