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.

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.

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 Investigation of diamond-like-carbon films prepared by unbalanced magnetron sputtering

2005 ◽  
Vol 54 (10) ◽  
pp. 4944
Author(s):  
Yang Wu-Bao ◽  
Fan Song-Hua ◽  
Zhang Gu-Ling ◽  
Ma Pei-Ning ◽  
Zhang Shou-Zhong ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron

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.

Chemistry Consistency Analysis of Tungsten-Doped Diamond-Like Carbon (DLC) Coatings

Tribology ◽  
2005 ◽  
Author(s):  
Jeries Abou-Hanna ◽  
John Carlson ◽  
Jose´ Lozano
Keyword(s):  
Tungsten Carbide ◽  
Depth Profiling ◽  
Diamond Like Carbon ◽  
Dlc Coatings ◽  
Magnetron Deposition ◽  
Deposition Chamber ◽  
Unbalanced Magnetron ◽  
Film Characteristics ◽  
Two Degree Of Freedom ◽  
Profiling Analysis

Tungsten-doped diamond-like carbon (DLC) coatings have been magnetron sputtered onto 52100 steel with chromium and chromium/tungsten carbide dual interlayers using a Hauzer Techno Coating HTC 1200 4 UBM unbalanced magnetron deposition system. Internal fixturing to the deposition chamber rotates parts to be coated with a two degree of freedom system. By design, at certain intervals during the deposition, the acetylene flow is linearly altered to change film characteristics throughout the film. AES sputter depth profiling analysis shows that the fixture rotational system, designed to uniformly coat parts, causes localized chemistry variations in the coating. For a given location, the AES depth profile also clearly documents the intervals when acetylene flow was constant and when the flow was ramped.

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