Effect of temperature and arc discharge on friction and wear behaviours of carbon strip/copper contact wire in pantograph–catenary systems

Wear ◽  
2011 ◽  
Vol 271 (9-10) ◽  
pp. 1629-1636 ◽  
Author(s):  
T. Ding ◽  
G.X. Chen ◽  
J. Bu ◽  
W.H. Zhang
Keyword(s):  
Friction And Wear ◽  
Arc Discharge ◽  
Effect Of Temperature ◽  
Contact Wire

Effect of the vibration on friction and wear behavior between the carbon strip and copper contact wire pair

2012 ◽  
Vol 226 (8) ◽  
pp. 722-728 ◽  
Author(s):  
HJ Yang ◽  
GX Chen ◽  
SD Zhang ◽  
WH Zhang
Keyword(s):  
Wear Rate ◽  
Wear Mechanism ◽  
High Speed ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Arc Discharge ◽  
Discharge Energy ◽  
Friction And Wear Behavior ◽  
Contact Wire ◽  
Arc Erosion

This article reports an experimental study on the friction and wear behavior of carbon strip sliding against copper contact wire under strong electric current utilizing a high-speed block-on-ring tester. The dynamic mechanism of electric arc generation was investigated. Scanning electron microscopy was used to observe morphology of worn surfaces of the carbon strips. The results show that arc discharge has a certain correlation with low-frequency vibration of the carbon strip. The arc discharge frequency and the average single arc discharge energy initially decrease and then tend to stable with increasing normal load at different speeds. The wear rate increases first and then decreases and has the minimum when the load is equal to 100 N especially. Moreover, the wear rate steadily increases with increase in arc discharge energy and is almost directly proportional to arc discharge energy. Arc erosion was a dominant wear mechanism occurred in carbon strip sliding against copper contact wire at a low load, accompanying with adhesive wear and material transferring. However, mechanical wear was a main wear mechanism at a high load. Severe arc erosion weakened the conductivity of the carbon strip.

Effect of temperature on the friction and wear performance of porous oil-containing polyimide

2021 ◽  
Vol 157 ◽  
pp. 106891
Author(s):  
Hongwei Ruan ◽  
Yaoming Zhang ◽  
Song Li ◽  
Lijun Yang ◽  
Chao Wang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Effect Of Temperature ◽  
Wear Performance

Dynamic variation of arc discharge and its effect on corrosion direction under current-carrying sliding

2018 ◽  
Vol 233 (3) ◽  
pp. 380-392 ◽  
Author(s):  
Chaoyong Deng ◽  
Jian Yin ◽  
Hongbo Zhang ◽  
Xiang Xiong ◽  
Pei Wang ◽  
...  
Keyword(s):  
Friction Surface ◽  
High Speed ◽  
Friction And Wear ◽  
Arc Discharge ◽  
Capture Rate ◽  
Three Dimensional ◽  
Discharge Process ◽  
Friction Process ◽  
Large Margin ◽  
Dynamic Variation

Current-carrying sliding tests were performed on an HST-100 high-speed multifunction friction and wear tester. Cf/Cu/C composite was used as the pin, and commercial QCr0.5 was employed as the disk. Sliding tests were carried out at a speed of 30 m/s and a load of 70 N under 25 A, 50 A, 75 A, and 100 A, respectively. Light intensity was collected by a photodiode, and the arc discharge process was recorded by a high-speed camera (HX-5) with a capture rate of 20,000 fp/s. The worn surfaces were characterized by a Nova NanoSEM230 scanning electron microscope and a NANO Focus AG three-dimensional topography instrument. The result indicates that arc discharge occurs randomly, both temporally and spatially, as long as the condition is suitable and occurs more at the beginning and end of the friction process. The arc moves constantly along the friction direction to the outlet. Compared to the inlet, the erosion of the outlet is considerably worse. This finding indicates the arc is moving towards the outlet and grows by a large margin when it leaves the friction surface at the outlet end.

Effect of Arc Discharge on Friction and Wear Behaviors of Stainless Steel/Copper-Impregnated Metalized Carbon Couple under Electric Current

2010 ◽  
Vol 150-151 ◽  
pp. 1364-1368 ◽  
Author(s):  
Tao Ding ◽  
Guang Xiong Chen ◽  
Ming Xue Shen ◽  
Min Hao Zhu ◽  
Wei Hua Zhang
Keyword(s):  
Stainless Steel ◽  
Electric Current ◽  
Friction And Wear ◽  
Arc Discharge ◽  
Arc Erosion ◽  
Pin On Disc ◽  
Contact Couple ◽  
Worn Surface ◽  
Oxidation Wear ◽  
Friction And Wear Tests

Friction and wear tests of stainless steel rubbing against copper-impregnated metalized carbon with electric current were carried on the pin-on-disc tester. The result indicates that arc discharge occurs in the process of experiments, and the intensity of arc discharge of interface increases with increasing of electric current and sliding velocity. As increasing of the arc discharge intensity, friction coefficient shows a tendency of slightly increase. While the rate of copper-impregnated metalized carbon material increase significantly with the increase of arc discharge intensity. Through observing the worn surface morphology of pin samples, it is found that the abrasive wear is dominant at small arc discharge due to worn particles and arc ablation craters, but arc erosion and oxidation wear are the main wear mechanisms in condition of large arc discharge due to arc discharge and its producing high temperature. The materials transfer of contact couple occurs in the process of friction and wear.

scholarly journals Utilization of TiO2/gC3N4 nanoadditive to boost oxidative properties of vegetable oil for tribological application

Friction ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 273-287
Author(s):  
Nisha Ranjan ◽  
Rashmi C. Shende ◽  
Muthusamy Kamaraj ◽  
Sundara Ramaprabhu
Keyword(s):  
Vegetable Oil ◽  
Friction And Wear ◽  
Oxidation Behavior ◽  
Tribological Performance ◽  
Effect Of Temperature ◽  
Wear Properties ◽  
Promising Alternative ◽  
Mineral Oils ◽  
Tribological Application ◽  
Friction And Wear Properties

AbstractThe emergence of vegetable oil as a promising alternative lubricant in the tribological application space has fueled research for making these oils as useful as mineral oils. Tribological modification of vegetable oil by the addition of TiO2/gC3N4 nanocomposite (as a nanoadditive) was studied here. The dispersion of the nanoadditive in the vegetable oil showed good oil dispersion stability without the addition of any surfactant. The tribological studies were conducted in a four-ball tester using ASTM standard D5183. In addition, the effect of temperature on tribological performance was also studied to understand the oxidation behavior of vegetable oil. The results showed a significant improvement in friction and wear properties of the optimized nano-oil. The mechanism behind the improvement in friction and wear properties is annotated in this paper.

Effect of temperature on the friction and wear behaviors of Cr3C2–20 wt% Ni cermets

2019 ◽  
Vol 6 (10) ◽  
pp. 1065c3 ◽  
Author(s):  
Wenyan Zhai ◽  
Liang Sun ◽  
Hui Dong ◽  
Yiran Wang ◽  
He Lin
Keyword(s):  
Friction And Wear ◽  
Effect Of Temperature

scholarly journals Effect of temperature and mating pair on tribological properties of DLC and GLC coatings under high pressure lubricated by MoDTC and ZDDP

Friction ◽  
2020 ◽  
Author(s):  
Kang Liu ◽  
Jia-jie Kang ◽  
Guang-an Zhang ◽  
Zhi-bin Lu ◽  
Wen Yue
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Effect Of Temperature ◽  
Wear Properties ◽  
Dlc Coatings ◽  
Base Oil ◽  
Two Temperatures ◽  
Friction And Wear Properties ◽  
Lubrication Conditions ◽  
Better Than

AbstractDiamond-like carbon (DLC) and graphite-like carbon (GLC) coatings have good prospects for improving the surface properties of engine parts. However, further understanding is needed on the effect of working conditions on tribological behaviors. In this study, GLC and two types of DLC coatings were deposited on GCr15 substrate for investigation. The friction and wear properties of self-mated and steel-mated pairs were evaluated. Two temperatures (25 and 90 °C), three lubrication conditions (base oil, molybdenum dithiocarbamate (MoDTC)-containing oil, MoDTC+zinc dialkyldithiophosphate (ZDDP)-containing oil), and high Hertz contact stress (2.41 GPa) were applied in the experiments. The results showed that high temperature promoted the effect of ZDDP on steel-mated pairs, but increased wear under base oil lubrication. The increased wear for steel-mated pairs lubricated by MoDTC-containing oil was due to abrasive wear probably caused by MoO3 and β-FeMoO4. It was also found that in most cases, the tribological properties of self-mated pairs were better than those of steel-mated pairs.

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