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.

scholarly journals Depth profiling analysis of solar wind helium collected in diamond-like carbon film from Genesis

2015 ◽  
Vol 49 (5) ◽  
pp. 559-566 ◽  
Author(s):  
Ken-ichi Bajo ◽  
Chad T. Olinger ◽  
Amy J. G. Jurewicz ◽  
Donald S. Burnett ◽  
Isao Sakaguchi ◽  
...  
Keyword(s):  
Solar Wind ◽  
Carbon Film ◽  
Depth Profiling ◽  
Diamond Like Carbon ◽  
Diamond Like Carbon Film ◽  
Profiling Analysis

Nano Investigation of Cracks in Tungsten-Doped Diamond-Like Carbon (DLC) Coatings

Tribology ◽  
2005 ◽  
Author(s):  
Jeries Abou-Hanna ◽  
John Carlson ◽  
Jose´ Lozano
Keyword(s):  
Tungsten Carbide ◽  
Surface Finish ◽  
Coating Thickness ◽  
Diamond Like Carbon ◽  
Substrate Roughness ◽  
Dlc Coatings ◽  
Eds Analysis ◽  
Sem And Tem ◽  
Surface Contaminants

Tungsten-doped diamond-like carbon (DLC) coatings have been magnetron sputtered onto 52100 steel blocks with chromium and chromium / tungsten carbide compound interlayers. The surface finish (Ra) of the substrate before deposition was 0.102 to 0.203 μm. The effect on the growth of the film of this substrate finish as well as surface contaminants is investigated using SEM and TEM. In areas of greatest substrate roughness, the coatings exhibited cracks from near the columnar structured chromium interlayer through the coating thickness. STEM EDS analysis shows chemistry variations at the interlayers to be minimal. In the areas with surface contaminants, cracks are observed in the film at an approximately 45° angle to the substrate.

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.

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.

scholarly journals Surface Reformation of Medical Devices with DLC Coating

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 376
Author(s):  
Mao Kaneko ◽  
Masanori Hiratsuka ◽  
Ali Alanazi ◽  
Hideki Nakamori ◽  
Kazushige Namiki ◽  
...  
Keyword(s):  
High Pressure ◽  
Medical Devices ◽  
Diamond Like Carbon ◽  
Steam Sterilization ◽  
Dlc Coatings ◽  
Chrome Plating ◽  
Living Body ◽  
Dlc Coating ◽  
Pressure Steam ◽  
Adhesion Friction

We evaluated the adhesion, friction characteristics, durability against bodily acids, sterilization, cleaning, and anti-reflection performance of diamond-like carbon (DLC) coatings formed as a surface treatment of intracorporeal medical devices. The major coefficients of friction during intubation in a living body in all environments were lower with DLC coatings than with black chrome plating. DLC demonstrated an adhesion of approximately 24 N, which is eight times stronger than that of black chrome plating. DLC-coated samples also showed significant stability without being damaged during acid immersion and high-pressure steam sterilization, as suggested by the results of durability tests. In addition, the coatings remained unpeeled in a usage environment, and there was no change in the anti-reflection performance of the DLC coatings. In summary, DLC coatings are useful for improving intracorporeal device surfaces and extending the lives of medical devices.

SIMS depth profiling analysis of P-doped n-type Si layer to develop the Si QD solar cell

2014 ◽  
Vol 46 (S1) ◽  
pp. 341-343
Author(s):  
Tae Woon Kim ◽  
Hyun Jeong Baek ◽  
Jong Shik Jang ◽  
Seung Mi Lee ◽  
Kyung Joong Kim
Keyword(s):  
Solar Cell ◽  
Depth Profiling ◽  
Profiling Analysis ◽  
Sims Depth Profiling

Atomic Force Microscopic Observations of Diamond-like Carbon (DLC) Films Produced by Plasma Immersion and Fibroblasts Cultured on DLC

2005 ◽  
Vol 11 (S03) ◽  
pp. 82-85 ◽  
Author(s):  
E. T. Uzumaki ◽  
C. S. Lambert ◽  
A. R. Santos Jr. ◽  
C. A. C. Zavaglia
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Impedance ◽  
Corrosion Behaviour ◽  
Three Dimensional ◽  
Chemical Vapour ◽  
High Wear Resistance ◽  
Diamond Like Carbon ◽  
Good Adhesion ◽  
Dlc Coatings ◽  
High Adhesion

Diamond-like carbon (DLC) films have been intensively studied with a view to improving orthopaedic implants. Studies have indicated smoothness of the surface, low friction, high wear resistance, corrosion resistance and biocompatibility [1-4]. DLC coatings can be deposited using various techniques, such as plasma assisted chemical vapour deposition (PACVD), magnetron sputtering, laser ablation, and others [5]. However it has proved difficult to obtain films which exhibit good adhesion. The plasma immersion process, unlike the conventional techniques, allows the deposition of DLC on three-dimensional workpieces, even without moving the sample, without an intermediate layer, and with high adhesion [6], an important aspect for orthopaedic articulations. In our previous work, DLC coatings were deposited on silicon and Ti-13Nb-13Zr alloy substrates using the plasma immersion process for the characterization of microstructure, mechanical properties and corrosion behaviour [7-9]. Hardness, measured by a nanoindenter, ranged from 16.4-17.6 GPa, the pull test results indicate the good adhesion of DLC coatings to Ti-13Nb-13Zr, and electrochemical assays (polarization test and electrochemical impedance spectroscopy) indicate that DLC coatings produced by plasma immersion can improve the corrosion resistance [9].

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.

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