Increased elasticity and damping capacity of diamond-like carbon coatings by immobilized C60 fullerene clusters

Nanoscale ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 2863-2870 ◽  
Author(s):  
Hee-Kyung Yang ◽  
Mahdi Khadem ◽  
Oleksiy V. Penkov ◽  
Dae-Eun Kim
Keyword(s):  
C60 Fullerene ◽  
Damping Capacity ◽  
Diamond Like Carbon ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Fullerene Clusters

The elasticity, damping capacity and as a result durability of diamond-like carbon (DLC) coatings in contact situations were significantly improved through introducing an interlayer of immobilized C60 fullerene clusters.

scholarly journals The properties of lubricated friction pairs with diamond-like carbon coatings

2020 ◽  
Vol 10 (1) ◽  
pp. 688-698
Author(s):  
Joanna Kowalczyk ◽  
Krystian Milewski ◽  
Monika Madej ◽  
Dariusz Ozimina
Keyword(s):  
Ionic Liquids ◽  
Vapour Deposition ◽  
Steel Substrate ◽  
Cutting Fluid ◽  
Diamond Like Carbon ◽  
Surface Geometry ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Tribological Tests ◽  
Zinc Aspartate

AbstractThe purpose of the study was to evaluate the properties of diamond-like carbon DLC coatings with ionic liquids and cutting fluid containing zinc aspartate used as lubricants. The DLC coatings (a–C:H) were deposited onto the 100Cr6 steel substrate by physical vapour deposition PVD. The surface morphology testing, cross section and chemical composition analyses of the DLC coatings were performed using the scanning electron microscope, equipped with an EDS microanalyzer. Surface geometry measurements prior to and after tribological tests were performed on a confocal microscope with interferometry. The tribological tests were carried out on an Anton Paar TRB3 tribometer under technically dry friction and lubricated conditions with an ionic liquid, trihexyltetradecylphosphonium bis (trifluoromethylsulfonyl) imide and 1–butyl– 3–methylimidazolium bis (trifluoromethylsulfonyl) imide and cutting fluid with zinc aspartate. The results show that DLC coatings and ionic liquids can significantly reduce resistance to motion.

scholarly journals DLC Films Deposited by the DC PACVD Method

10.14311/398 ◽  
2003 ◽  
Vol 43 (1) ◽  
Author(s):  
D. Palamarchuk ◽  
M. Zoriy ◽  
J. Gurovič ◽  
F. Černý ◽  
S. Konvičková ◽  
...  
Keyword(s):  
Vapour Deposition ◽  
Chemical Vapour ◽  
Diamond Like Carbon ◽  
Deposition Method ◽  
Surface Layers ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Steel Substrates ◽  
Poor Adhesion ◽  
Chemical Vapour Deposition Method

DLC (Diamond-Like Carbon) coatings have been suggested as protective surface layers against wear. However hard DLC coatings, especially those of greater thickness, have poor adhesion to substrates. We have used several ways to increase the adhesion of DLC coatings prepared by the PACVD (Plasma Assisted Chemical Vapour Deposition) method on steel substrates. One of these is the DC PACVD method for preparing DLC films.

Tissue Response in the Femur of Rats After Implantation of Diamond-Like Carbon Coatings on Ti-13Nb-13Zr Produced by Plasma Immersion

2006 ◽  
Vol 309-311 ◽  
pp. 783-788 ◽  
Author(s):  
E.T. Uzumaki ◽  
C.S. Lambert ◽  
N.A. Batista ◽  
W.D. Belangero ◽  
Cecília A.C. Zavaglia
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Animal Model ◽  
Tissue Response ◽  
Diamond Like Carbon ◽  
Ti Alloy ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Femoral Condyles ◽  
Scanning Electron

Diamond-like carbon (DLC) coatings were deposited on titanium alloy (Ti-13Nb-13Zr) by plasma immersion process. DLC-coated Ti alloy and uncoated Ti were investigated in an animal model using the femoral condyles of rats for intervals of 4 and 12 weeks postoperatively. The interface between the implants and bones of the femoral condyles were analysed using scanning electron microscopy (SEM) by backscattering. The results showed that the DLC coatings were well tolerated in both periods.

Sliding Wear of Non-Hydrogenated Diamond-Like Carbon Coatings Against Al, Cu and Ti

2005 ◽  
Author(s):  
E. Konca ◽  
Y. T. Cheng ◽  
A. T. Alpas
Keyword(s):  
Sliding Wear ◽  
Ambient Air ◽  
Inert Atmosphere ◽  
Diamond Like Carbon ◽  
Severe Damage ◽  
Material Transfer ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
Pin On Disc

Magnetron sputtered non-hydrogenated diamond-like carbon (DLC) coatings were tested against Al, Cu and Ti pins using a vacuum pin-on-disc tribometer. The objective was to compare Al, Ti, and Cu transfer to DLC coatings in air (29% RH) and an inert atmosphere (argon). In argon, a significant amount of adhesion and material transfer occurred from the Al and Ti pins to the DLC coating surfaces inflicting severe damage to the coatings. Wear and material transfer of the DLC coating against Cu were negligible in argon. Compared to tests in argon, the tribological performance of the DLC coatings against Al and Ti improved significantly in ambient air. In contrast, the wear rate of the DLC coatings against Cu was much higher in ambient air compared to that in argon.

Preparation of Hard Coatings on Polycarbonate Substrate by High Frequency Ion Beam, Deposition using CH4/H2 Gases

1997 ◽  
Vol 504 ◽  
Author(s):  
S. R. Kim ◽  
J. S. Song ◽  
Y. J. Choi ◽  
J. H. Kim
Keyword(s):  
High Frequency ◽  
Ion Beam ◽  
Hard Coatings ◽  
Diamond Like Carbon ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Engineering Plastics ◽  
High Impact Strength ◽  
Polycarbonate Substrate ◽  
Beam Deposition

ABSTRACTPolycarbonate is one of the most widely used engineering plastics because of its transparency and high impact strength. The poor wear and scratch properties of polycarbonate have limited its application in many fields. In order to improve the wear and scratch properties of polycarbonate we have deposited diamond like carbon (DLC) coatings. The diamond like carbon coatings were made using a high frequency ion beam gun by introducing H2 and CH4 gases. The coatings were characterized with scanning electron microscope, Raman spectroscopy, ellipsometer, and microscratch tester. Polymer hard coating was applied onto the polycarbonate substrate before depositing a diamond like carbon coating to see the effect of interlayer on the system's failure mechanism.

scholarly journals Diamond-Like Carbon (DLC) Coatings for Automobile Applications

2020 ◽  
Author(s):  
Funsho Olaitan Kolawole ◽  
Shola Kolade Kolawole ◽  
Luis Bernardo Varela ◽  
Adebayo Felix Owa ◽  
Marco Antonio Ramirez ◽  
...  
Keyword(s):  
Critical Load ◽  
Combustion Engine ◽  
Transformational Change ◽  
Diamond Like Carbon ◽  
Metallic Hydrogen ◽  
Automobile Engine ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Mechanical And Tribological Properties ◽  
Automobile Engines

Diamond-like carbon (DLC) coatings are amorphous carbon material which exhibits typical properties of diamond such as hardness and low coefficient of friction, characterized based on the sp3 bonded carbon and structure. The proportion of sp2 (graphetically) and sp3 (diamond-like) determines the properties of the DLC. This coating can be applied to automobile engine component in an attempt to provide energy efficiency by reducing friction and wear. However, DLC coatings are faced with issues of thermal instability caused by increasing temperature in the combustion engine of a vehicle. Therefore, it became necessary to seek ways of improving this coating to meetup with all tribological requirements that will be able to resist transformational change of the coating as the temperature increases. This chapter discusses the need for diamond-like carbon coatings for automobile engine applications, due to their ultra-low friction coefficient (<0.1) and excellent wear resistance (wear rate ~ 7 x 10−17 m3/N.m). The importance of DLC coatings deposited using PECVD technique, their mechanical and tribological properties at conditions similar to automobile engines would also be discussed. Non-metallic (hydrogen, boron, nitrogen, phosphorus, fluorine and sulfur) or metals (copper, nickel, tungsten, titanium, molybdenum, silicon, chromium and niobium) has been used to improve the thermal stability of DLC coatings. Recently, incorporation of Ag nanoparticles, TiO2 nanoparticles, WO3 nanoparticles and MoO3 nanoparticles into DLC has been used. The novel fabrication of diamond-like carbon coatings incorporated nanoparticles (WO3/MoO3) using PECVD for automobile applications has shown an improvement in the adhesion properties of the DLC coatings. DLC coatings had a critical load of 25 N, while after incorporating with WO3/MoO3 nanoparticles had critical load at 32 N and 39 N respectively.

Tribological Properties of Ti-Doped Diamond-Like Carbon Coatings Under Boundary Lubrication With ZDDP

2020 ◽  
pp. 1-28
Author(s):  
Yanyan Wang ◽  
Yang Wang ◽  
Jia-jie Kang ◽  
Guozheng Ma ◽  
Lina Zhu ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Photoelectron Spectroscopy ◽  
Diamond Like Carbon ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Mechanical And Tribological Properties ◽  
Cathodic Arc Deposition ◽  
Steel Substrates ◽  
Cathodic Arc ◽  
Ti Content

Abstract Diamond-like carbon (DLC) coatings containing 0.7%, 5.8% and 23.3% Ti were deposited via pulsed cathodic arc deposition and magnetron sputtering on AISI 316L stainless steel substrates. The varied Ti content was controlled by setting Ti target current at 3, 5 and 7A. The composition, microstructure, mechanical and tribological properties of Ti-doped DLC (Ti-DLC) coatings were investigated using X-ray photoelectron spectroscopy, Raman spectroscopy, nanoindentation and ball-on-disc tribometer. The results show that TiC formed when Ti content in the coating was higher than 5.8% and the ID/IG ratios increased gradually with the increasing Ti content. Ti-DLC with 0.7 Ti had the highest H/E and H3/E2 ratios and exhibited optimal tribological properties under lubrication, especially when ZDDP was contained in the oil. Furthermore, ZDDP tribofilms played an important role in wear reduction by protecting the rubbing surfaces against adhesion and suppressing the tribo-induced graphitization of DLC coatings.

Effects of Interlayer on Mechanical Properties of Diamond-Like Carbon Coatings

2018 ◽  
Vol 883 ◽  
pp. 43-47 ◽  
Author(s):  
Sun Hui Yao ◽  
Yan Liang Su ◽  
Yu Chen Lai ◽  
Huang Ming Wu
Keyword(s):  
Mechanical Properties ◽  
Diamond Like Carbon ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Mechanical And Tribological Properties ◽  
Dlc Coating ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron ◽  
The One ◽  
Sputtering System

This paper reports comparative studies on effects of interlayer on mechanical properties of diamond-like carbon (DLC) coatings. Two interlayers, TiC/Ti and CrC/Cr, were deposited and studied. The DLC coatings were prepared by using an unbalanced magnetron sputtering system. The chemical composition, micro-structure, constituted phases, and fundamental mechanical and tribological properties were evaluated. The results showed that the two amorphous (a-) DLC coatings were obtained. The a-DLC coating with the TiC/Ti interlayer showed higher adhesion, hardness and wear resistance than the one with the CrC/Cr interlayer.

Morphology of Fibroblastic Cells Cultured on Diamond-Like Carbon Coatings Produced by Plasma Immersion Using AFM and SEM

2006 ◽  
Vol 309-311 ◽  
pp. 713-716 ◽  
Author(s):  
E.T. Uzumaki ◽  
C.S. Lambert ◽  
L.O. Bonugli ◽  
A.R. Santos ◽  
Cecília A.C. Zavaglia
Keyword(s):  
Biological Effects ◽  
Diamond Like Carbon ◽  
Electron Microscopic ◽  
Adhesion Properties ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
Atomic Force ◽  
Fibroblastic Cells ◽  
Potential Use

For the potential use of diamond-like carbon (DLC) coating for biomedical applications, it would be important to evaluate the biological effects of these coatings. In this study, DLC coatings were deposited on glass coverslips using the plasma immersion process, which produces films with adhesion properties superior to those prepared with conventional techniques. Scanning electron microscopic and atomic force microscopic observations were used to study the morphology of fibroblasts growth on DLC coatings.

The Lubrication Properties of Diamond-Like Carbon Coatings in Engine Oil

2009 ◽  
Vol 610-613 ◽  
pp. 652-657 ◽  
Author(s):  
Chao Yin Nie ◽  
Xiao Kui Liu ◽  
Hisashi Watanabe
Keyword(s):  
Carbon Matrix ◽  
Engine Oil ◽  
Diamond Like Carbon ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Nanocomposite Structure ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron ◽  
Oil Films ◽  
Thick Coatings

Ti-doped diamond-like carbon(Ti-DLC) coatings and undoped diamond-like carbon(DLC) coatings were synthesized by unbalanced magnetron sputtering using carburized Chromium Molybdenum Steels (SCM415) as substrates. Nanocomposite structure coatings with metal carbides nanocrystals uniformly dispersing in the amorphous carbon matrix were obtained by the optimization of the kinds of doped metals and deposited parameters. This kind of nanocomposite structure permits improved hardness while maintaining a lower residual stress and getting thick coatings. The friction coefficients of Ti doping DLC coatings are relatively lower compared with undoping DLC coatings in engine oil. The analysis on the wear surface of coatings have indicated that: the surface of DLC doped with metal absorbs more elements from the engine oil, which indicates that the doping of metal can improve the affinity of the coating for the engine oil, enhance the formation of lubrication oil films, and reduce the friction coefficient thereby.

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