scholarly journals Regression Analysis of the Effect of Bias Voltage on Nano- and Macrotribological Properties of Diamond-Like Carbon Films Deposited by a Filtered Cathodic Vacuum Arc Ion-Plating Method

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Shojiro Miyake ◽  
Takanori Shindo ◽  
Masatoshi Miyake
Keyword(s):  
Friction Coefficient ◽  
Bias Voltage ◽  
Wear Behavior ◽  
Vacuum Arc ◽  
Diamond Like Carbon ◽  
Wear Depth ◽  
Nanoindentation Hardness ◽  
Dc Bias ◽  
Filtered Cathodic Vacuum Arc ◽  
Disk Test

Diamond-like carbon (DLC) films are deposited by bend filtered cathodic vacuum arc (FCVA) technique with DC and pulsed bias voltage. The effects of varying bias voltage on nanoindentation and nanowear properties were evaluated by atomic force microscopy. DLC films deposited with DC bias voltage of −50 V exhibited the greatest hardness at approximately 50 GPa, a low modulus of dissipation, low elastic modulus to nanoindentation hardness ratio, and high nanowear resistance. Nanoindentation hardness was positively correlated with the Raman peak ratioId/Ig, whereas wear depth was negatively correlated with this ratio. These nanotribological properties highly depend on the films’ nanostructures. The tribological properties of the FCVA-DLC films were also investigated using a ball-on-disk test. The average friction coefficient of DLC films deposited with DC bias voltage was lower than that of DLC films deposited with pulse bias voltage. The friction coefficient calculated from the ball-on-disk test was correlated with the nanoindentation hardness in dry conditions. However, under boundary lubrication conditions, the friction coefficient and specific wear rate had little correlation with nanoindentation hardness, and wear behavior seemed to be influenced by other factors such as adhesion strength between the film and substrate.

Tribological behavior of diamond-like carbon coatings with patterned structure deposited by the filtered cathodic vacuum arc

2019 ◽  
Vol 685 ◽  
pp. 123-130 ◽  
Author(s):  
Yongqing Shen ◽  
Han Zhou ◽  
Haoqi Wang ◽  
Bin Liao ◽  
Xianying Wu ◽  
...  
Keyword(s):  
Tribological Behavior ◽  
Vacuum Arc ◽  
Diamond Like Carbon ◽  
Carbon Coatings ◽  
Filtered Cathodic Vacuum Arc

Effect of defects on wear behavior in ta-C coating prepared by filtered cathodic vacuum arc deposition

2020 ◽  
Vol 105 ◽  
pp. 107789
Author(s):  
Woo-Young Lee ◽  
Young-Jun Jang ◽  
Takayuki Tokoroyama ◽  
Motoyuki Murashima ◽  
Noritsugu Umehara
Keyword(s):  
Wear Behavior ◽  
Vacuum Arc ◽  
Vacuum Arc Deposition ◽  
Filtered Cathodic Vacuum Arc ◽  
Arc Deposition

scholarly journals Influence of WS2Nanopowder Addition on Friction Characteristics of ta-C Coating by FCVA Method

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Si-Geun Choi ◽  
Yong-Joong Lee ◽  
Young-Jun Jang ◽  
Dawit Zenebe Segu ◽  
Seock-Sam Kim ◽  
...  
Keyword(s):  
Raman Spectrum ◽  
Friction Coefficient ◽  
Tribological Behavior ◽  
Vacuum Arc ◽  
Particle Sizes ◽  
Friction Test ◽  
Alpha Olefin ◽  
Filtered Cathodic Vacuum Arc ◽  
Nano Size ◽  
Lubrication Conditions

The influence of nano-sizeWS2powders on the tribological behavior of ta-C coatings by the filtered cathodic vacuum arc (FCVA) method under boundary lubrication conditions has been investigated. In order to characterize and understand tribological behaviors of nano-sizeWS2powders added to the synthetic oil (poly-alpha-olefin 6), lubricants with different mixture ratios, ranging from 2 to 8 wt%, have been prepared. ta-C coatings fabricated by FCVA method showed that the G-peak in the obtained Raman spectrum was shifted from 1520 to 1586 cm−1, indicating the sp3content increased for samples with the thickness of 156 nm. The average friction coefficient decreased proportionally as the nano-sizeWS2compositions increased up to 4 wt% in PAO6. After the friction test, structures and particle sizes ofWS2phases were also precisely characterized by using XRD and SEM.

Intrinsic mechanical properties of diamond-like carbon thin films deposited by filtered cathodic vacuum arc

2004 ◽  
Vol 95 (7) ◽  
pp. 3509-3515 ◽  
Author(s):  
Zhenghao Gan ◽  
Yuebin Zhang ◽  
Guoqing Yu ◽  
C. M. Tan ◽  
S. P. Lau ◽  
...  
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Vacuum Arc ◽  
Diamond Like Carbon ◽  
Carbon Thin Films ◽  
Filtered Cathodic Vacuum Arc

scholarly journals The Effect of Bias Voltage and Gas Pressure on the Structure, Adhesion and Wear Behavior of Diamond Like Carbon (DLC) Coatings With Si Interlayers

Coatings ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 214-230 ◽  
Author(s):  
Liam Ward ◽  
Fabian Junge ◽  
Andreas Lampka ◽  
Mark Dobbertin ◽  
Christoph Mewes ◽  
...  
Keyword(s):  
Bias Voltage ◽  
Wear Behavior ◽  
Gas Pressure ◽  
Diamond Like Carbon ◽  
Dlc Coatings

scholarly journals Wear behavior of self-propagating high-temperature synthesized Cu-TiO2 nanocomposites

2021 ◽  
Vol 1 (3) ◽  
pp. 127-134
Author(s):  
Hossein Aghajani ◽  
Mohammad Roostaei ◽  
Shaya Sharif Javaherian ◽  
Arvin Taghizadeh Tabrizi ◽  
Ali Abdoli Silabi ◽  
...  
Keyword(s):  
High Temperature ◽  
Friction Coefficient ◽  
Phase Formation ◽  
Wear Behavior ◽  
Stoichiometric Ratio ◽  
Excess Copper ◽  
High Temperature Synthesis ◽  
Oxide Particles ◽  
Pin On Disk ◽  
Disk Test

In this paper, the copper-based nanocomposites with TiO2 nanoparticles were synthesized by the self-propagating high-temperature synthesis (SHS) process. The effect of the different amounts of excess copper, in comparison with the stoichiometric ratio (CuO:Ti ratios of 1:1, 2:1, and 3:1), on the phase formation of achieved samples was studied. A thermodynamical study showed that increasing the excess copper powder reduces the adiabatic temperature, which helps the phase formation. The maximum Brinell hardness (89) was obtained for the sample with the CuO:Ti ratio of 1:1. Finally, the wear behavior of the synthesized nanocomposites was evaluated by the pin on disk test, and the variation of friction coefficient and lost weight were measured. The friction coefficient decreased by the formation of phases and distribution of titanium oxide particles during the SHS process in the presence of the stoichiometric ratio of CuO:Ti. Therefore, the wear behavior was improved. The lowest depth of wear trace was measured 0.68 where the ratio of CuO: Ti was 1:1.

Characteristics of Palladium Doped Amorphous Carbon Films Fabricated by Unbalanced Magnetron Sputtering System

2021 ◽  
Vol 16 (6) ◽  
pp. 905-910
Author(s):  
Yong Seob Park ◽  
Young-Baek Kim ◽  
Sung Hwan Hwang ◽  
Jaehyeong Lee
Keyword(s):  
Friction Coefficient ◽  
Magnetron Sputtering ◽  
Bias Voltage ◽  
Amorphous Carbon ◽  
Closed Field ◽  
Hydrogenated Amorphous Carbon ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron ◽  
Dc Bias ◽  
Hydrogenated Amorphous

Generally, hydrogenated amorphous carbon (a-C:H) has been shown to have a low friction coefficient, high hardness, and low abrasive wear rate. In this study, Pd doped hydrogenated amorphous carbon (a-C:H:Pd) fabricated by the closed-field unbalanced magnetron sputtering (CFUBMS) system with two targets of carbon and palladium in Ar/C2H2 plasma. The tribological and lubricant characteristics for a-C:H:Pd fabricated with various DC bias voltage from 0 to −200 V were investigated. We obtained a hardness up to 27.5 GPa and friction coefficient lower than 0.1. The atomic percentage of Pd related to the lubricant properties increased up to 22% at −200 V. In the results, the Pd doping in the a-C:H films improved the tribological and lubricant properties. The friction coefficient value of a-C:H:Pd films was decreased, the hardness and elastic modulus were increased, and also the adhesion properties was improved with the increase of negative DC bias voltage.

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