Tribological behavior and wear mechanism of Cu/CF/phenolic resin sandwich composites under current

2020 ◽  
pp. 152808372096669
Author(s):  
Enhao Dai ◽  
Guangzhen Li ◽  
Guixia Lu ◽  
Wen Wang ◽  
Zhengde Han ◽  
...  
Keyword(s):  
Wear Mechanism ◽  
Phenolic Resin ◽  
Wear Behavior ◽  
Erosion Wear ◽  
Arc Erosion ◽  
Current Transmission ◽  
Contact Strip ◽  
Oxidation Wear ◽  
Traction Power ◽  
Lower Resistivity

The catenary system was an important part of electrified railway, which provided traction power for electric trains. Cu/CF/phenolic resin contact strip (CFRCS) had been designed with excellent mechanical strength and electrical conductivity. The properties of CFRCS and the pure carbon contact strip (PCCS) were also compared. It could be found that CFRCS not only had higher impact strength than PCCS, but also had lower resistivity, which was favorable for current transmission. This paper analyzed the wear behavior of contact strips from two aspects of wear data and abrasive dust, which was mainly determined by the current and its components. The current-carrying wear mechanism of CFRCS was mainly arc erosion wear, oxidation wear and adhesive wear, while that of PCCS was oxidation wear and arc erosion wear.

scholarly journals Effect of VN and TiB2-TiCx Reinforcement on Wear Behavior of Al 7075-Based Composites

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3389
Author(s):  
Yaping Bai ◽  
Jiale Wei ◽  
Naqing Lei ◽  
Jianping Li ◽  
Yongchun Guo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Room Temperature ◽  
Wear Behavior ◽  
Wear Test ◽  
Wear Properties ◽  
Al 7075 ◽  
Hot Pressing Sintering ◽  
Oxidation Wear

Al 7075 alloy, 15 wt.% VN/7075 composites, and 20 wt.% TiB2-TiCx/7075 composites were prepared by ball milling with subsequent hot-pressing sintering. The microstructure, hardness, and wear properties at room temperature to 200 °C of Al 7075-based composites with different reinforcement phases were discussed. The grain uniformity degree values of 15 wt.% VN/7075 composites and 20 wt.% TiB2-TiCx/7075 composites were 0.25 and 0.13, respectively. The reinforcement phase was uniformly distributed in 15 wt.% VN/7075 composites and 20 wt.% TiB2-TiCx/7075 composites, almost no agglomeration occurred. The order of hardness was 20 wt.% TiB2-TiCx/7075 composites (270.2 HV) > 15 wt.% VN/7075 composites (119.5 HV) > Al 7075 (81.8 HV). At the same temperature, the friction coefficient of 15 wt.% VN/7075 composites was the lowest, while the volume wear rate of 20 wt.% TiB2-TiCx/7075 composites was the lowest. With the increase of temperature, the wear mechanism of Al 7075 changed from spalling wear to oxidation wear and adhesion wear. However, the wear mechanisms of 15 wt.% VN/7075 and 20 wt.% TiB2-TiCx/7075 composites changed from abrasive wear at room temperature to wear mechanism (oxidation wear, abrasive wear, and adhesive wear) at medium and low temperature. Comprehensive wear test results indicated that 20 wt.% TiB2-TiCx/7075 composites had excellent tribological properties at medium and low temperature.

Study on Erosion Wear Behavior of PDCPD/MMT Nanocomposite

2010 ◽  
Vol 123-125 ◽  
pp. 231-234 ◽  
Author(s):  
Bing Li Pan ◽  
Ya Li Xing ◽  
Chun Fei Zhang ◽  
Yu Qing Zhang
Keyword(s):  
Wear Mechanism ◽  
Erosion Rate ◽  
In Situ Polymerization ◽  
Wear Behavior ◽  
Engineering Application ◽  
Erosion Wear ◽  
Fatigue Wear ◽  
Brittle Rupture ◽  
Sand Erosion ◽  
Mechanical Cutting

Polydicyclopentadiene (PDCPD)/montmorillonite Clay (MMT) nanocomposites were synthesized through reaction injection molding with a Gusmer-Decker machine by in situ polymerization. The results of X-ray diffraction (XRD) diagrams of the nanocomposites showed that MMT were completely exfoliated within the range of 0.25% to 4% MMT. The erosion wear behaviors of PDCPD/MMT nanocomposites were studied using an MCF-30 water and sand erosion wear tester. The worn surface of PDCPD/MMT nanocomposites was exami-ned with a scanning electron microscope (SEM) and the wear mechanism was discussed.It was found that when the content of MMT is 0.25%, the erosion rate of nanocompositesreach the minimum; the erosion rate of nanocomposites increases with the increase of MMT content compared with neat PDCPD. The important wear mechanism of neat PDCPD was tearing and ploughing-cutting, And the results showed that wear mechanism of PDCPD/MMT nanocomposites was dominated by ploughing-cutting, with the increase of MMT the severe mechanical cutting, fatigue wear and slight brittle rupture appear. PDCPD/MMT nanocomposites with a lower content of MMT were thus a promising structural material candidate for engineering application.

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.

scholarly journals Micro Hardness and Erosive Wear Behavior of Tungsten Carbide Filled Epoxy Polymer Nano Composites

2020 ◽  
Vol 5 (3) ◽  
pp. 405-415
Author(s):  
M. Kameswara Reddy ◽  
V. Suresh Babu ◽  
K. V. Sai Srinadh
Keyword(s):  
Tungsten Carbide ◽  
Polymer Nanocomposites ◽  
Adhesive Bonding ◽  
Epoxy Polymer ◽  
Wear Behavior ◽  
Erosive Wear ◽  
Nano Composites ◽  
Erosion Wear ◽  
Wear Properties ◽  
The Matrix

The present work studies the tribological performance of Tungsten Carbide (WC) nanoparticles reinforced epoxy polymer nanocomposites. Polymer nanocomposites are prepared by hand lay-up method. Erosive wear and hardness tests were conducted to examine the physical and wear properties of epoxy/WC nanocomposites. Addition of WC nanoparticles led to significant reduction in erosion rate. In addition to that, incorporation of WC nanoparticles enhanced the hardness of epoxy nano composites. At 2% weight of WC nano filler, nanocomposites showed better performance in erosion wear properties and also in hardness. While at 3wt% of WC filler, least performance in hardness was caused by the weak adhesive bonding between the matrix and filler. The nature of erosion wear behavior was observed. Finally worn surfaces of nanocomposites were inspected using a “scanning electron microscope (SEM)”.

The hydro-abrasive erosion wear behavior of duplex-treated surfaces of AISI H13 tool steel

2014 ◽  
Vol 57 (5) ◽  
pp. 1040-1051 ◽  
Author(s):  
Mumin Tutar ◽  
Hakan Aydin ◽  
Ali Durmus ◽  
Ali Bayram ◽  
Kurtulus Yigit
Keyword(s):  
Tool Steel ◽  
Wear Behavior ◽  
Erosion Wear ◽  
H13 Tool Steel ◽  
Abrasive Erosion ◽  
Aisi H13 ◽  
Aisi H13 Tool Steel

A Study on Erosion Wear Behavior of Alkaline and Silane Modified Coconut Sheath and Red Mud Reinforced Hybrid Composites

2021 ◽  
pp. 1-17
Author(s):  
Vigneshwaran Shanmugam ◽  
M. Uthayakumar ◽  
V. Arumugaprabu ◽  
M.S. Abdul Majid ◽  
R. Deepak Joel Johnson
Keyword(s):  
Red Mud ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Erosion Wear

Investigation of the Wear Behavior of AA6082 Against Different Counterparts

2021 ◽  
Author(s):  
Safiye İpek Ayvaz ◽  
Mehmet Ayvaz
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Wear Rate ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Specific Wear Rate ◽  
Pin On Disk ◽  
Disk Method ◽  
Sliding Distance ◽  
Oxidation Wear

In this study, the effect of different counterparts on the wear resistance of AA6082 aluminum alloy was investigated. In tests using pin-on-disk method, 6 mm diameter Al2O3, 100Cr6 and WC-6Co balls were used as counterparts. The tests were carried out using 500 m sliding distance and 5N load. The lowest specific wear rate was measured as 7.58x10-4 mm3/Nm in WC-6Co / AA6082 couple, and the highest value was measured as 9.71x10-4 mm3/Nm in 100Cr6/AA6082 couple. In the Al2O3/AA6082 couple, the specific wear rate of the AA6082-T6 sample was determined as 8.23x10-4 mm3/Nm.While it was observed that the dominant wear type in the 100Cr6/AA6082 pair was abrasive wear, oxidation wear and oxide tribofilm were detected in the WC-6Co/AA6082 and Al2O3/AA6082 couple besides the abrasive wear.

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