Friction and Wear Characteristics of Magneto-Rheological Elastomers Based on Silicone/Polyurethane Hybrid

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Chenglong Lian ◽  
Kwang-Hee Lee ◽  
Chul-Hee Lee
Keyword(s):  
Friction And Wear ◽  
Matrix Material ◽  
Operating Conditions ◽  
Wear Depth ◽  
Test Results ◽  
Wear Properties ◽  
Wear Performance ◽  
Friction And Wear Properties ◽  
Magneto Rheological ◽  
Mr Effect

The friction and wear properties of four different types of magneto-rheological (MR) elastomer were investigated. The MR elastomers have different matrix materials and structures. Most MR elastomers have a silicone matrix, since it has a more significant MR effect under a magnetic field compared to other materials. The mechanical properties of silicone, however, are poor compared to other materials, so it is difficult to use them in engineering applications. Therefore, a new polyurethane matrix material was used to enhance the friction and wear properties of MR elastomer. Additionally, two different matrix materials (silicone and polyurethane) were synthesized, and MR elastomers were structurally combined to improve the friction and wear performance. The friction characteristics of each MR elastomer were evaluated under reciprocating operating conditions. Wear depth was also measured to estimate the wear resistance. The test results show that the friction and wear performance of the modified MR elastomers are enhanced compared with the silicone-based MR elastomer.

The Analysis on the Tribological Properties of CR/EPDM Blends with Chrome-Plated Steel under Dry Sliding

2013 ◽  
Vol 774-776 ◽  
pp. 99-102 ◽  
Author(s):  
Lian Hua Zhao ◽  
Xiao Bo Wei ◽  
Xiao Guang Li
Keyword(s):  
Friction And Wear ◽  
Conveyor Belt ◽  
Operating Conditions ◽  
Dry Sliding ◽  
Wear Properties ◽  
Transportation Equipment ◽  
Pros And Cons ◽  
Friction And Wear Properties ◽  
Technology Comparison ◽  
Better Than

It is based on actual working conditions and parameters of the conveyor belt, to reach the purpose of the optimizing rubber by different rubbers mixing technology. Comparison the five kinds rubber and metal of the friction characteristics in dynamic fit, obtained a performance excellent rubber in the specific operating conditions. Then improve the overall service life of the transportation equipment. It is first prepared the same hardness CR and EPDM and blends that is ratio of 2:8, 5:5and8:2 in this article. The pros and cons of the five rubbers are analyzed by friction and wear properties of the above experimental. The test curve of coefficient friction and wear with time has been done under different load at constant low speed, friction and wear and wear mechanism of five rubbers with chrome-plated steel comparatively analyses to determine CR/EPDM = 8:2 blends has the heat resistance and wear resistance are better than CR and EPDM under dry sliding conditions.

Study on Friction and Wear Properties of Self-Lubricating Impregnated Diamond Bit Cutters

2011 ◽  
Vol 175 ◽  
pp. 136-139 ◽  
Author(s):  
Bing Suo Pan ◽  
Xiao Hong Fang ◽  
Ming Yuan Niu
Keyword(s):  
Friction Coefficient ◽  
Friction And Wear ◽  
Matrix Material ◽  
Wear Loss ◽  
Wear Properties ◽  
Wear Process ◽  
Impregnated Diamond Bit ◽  
Pin On Disc ◽  
Friction And Wear Properties ◽  
Diamond Bit

To reduce the friction coefficient between impregnated diamond bit and rock, experiments on addition of graphite to the matrix material of bit cutters were conducted. The cutters were made up of diamond contained working layers and binding layers. The friction and wear properties of cutters and binding layers were investigated using a pin-on-disc friction & wear tester with granite as tribopair. The results showed that with addition of graphite, the hardness and friction coefficient of binding layer decreased, but its wear resistance increased; compared to cutters without graphite, those cutters containing graphite had lower wear loss and friction coefficient and their sliding wear process was much steadier, but diamond protrusion was still normal.

Study on Friction and Wear of Several Metal Materials under Oil Lubrication

2013 ◽  
Vol 764 ◽  
pp. 55-59
Author(s):  
Zhan Bin Guo ◽  
Song Lin Gao
Keyword(s):  
Friction And Wear ◽  
Adhesive Wear ◽  
Friction Pair ◽  
Oil Lubrication ◽  
Wear Properties ◽  
Wear Performance ◽  
Sliding Speed ◽  
Metal Materials ◽  
Friction And Wear Properties ◽  
Main Factor

The friction and wear properties of several common metal materials (45#, 25CrMn, and 40CrNiMo) friction pair under oil lubrication was investigated on M-200 Type wear tester, and studied the friction under the condition of differ sliding speed and pressure. The results show that: the 25CrMn/45# steel pair has better tribological and wear performance; the load is the main factor which influences the friction of the material at the low sliding speed; the main wear form is adhesive wear, but the wear mechanism is gradually became from adhesive wear to abrasive wear and flaking wear with the contact pressure and sliding speed increased.

Effect of Niobium on the Dry Sliding Friction and Wear Properties of 100Cr6 Bearing Steel

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
He Guo-Ning ◽  
Zhou Ning-Bo ◽  
Zhang Chao-lei ◽  
Ba Xin-yu ◽  
Liu Ya-Zheng
Keyword(s):  
Friction Coefficient ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Bearing Steel ◽  
Dry Sliding ◽  
Wear Depth ◽  
Wear Properties ◽  
Nb Content ◽  
Friction And Wear Properties ◽  
Dry Sliding Friction

In this work, the dry sliding friction and wear properties were studied by wear test for 100Cr6 bearing steel when Nb content was 0.018% and 0.040%. In addition, in order to explain the differences, the experimental samples were processed for spheroidizing annealed and the quenched-tempered microstructure and hardness was analyzed. The result indicated that their friction coefficient was decreased to 0.047 when Nb content was 0.018% and the worn surface is microcutting and spalling without plowing. When Nb content was 0.040%, the friction coefficient was decreased to 0.006 and maximum wear depth was the deepest owing to obvious cutting. In order to increase the properties of the friction and wearing, Nb content should be decreased. With Nb content increased, the properties of the friction and wearing are decreased. The incorporation of Nb into bearing steel promotes the formation of martensite and carbide particles, which results in the diversity of the wear behaviors, eventually.

Investigation on Friction, Anti-wear, and Extreme Pressure Properties of Different Grades of Polyalphaolefins With Functionalized Multi-walled Carbon Nanotubes as an Additive

2020 ◽  
Vol 142 (8) ◽  
Author(s):  
Homender Kumar ◽  
A. P. Harsha
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Outer Diameter ◽  
Test Results ◽  
Extreme Pressure ◽  
Wear Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Friction And Wear Properties ◽  
Analytical Tools ◽  
Walled Carbon Nanotubes

Abstract In the present investigation, the COOH-functionalized multi-walled carbon nanotubes (MWCNTs) having an outer diameter of 20–30 nm and length 1−2 μm were dispersed in four different grades of polyalphaolefins (PAOs; i.e., PAO 4, PAO 6, PAO 40, and PAO 100) at various concentrations (0.025, 0.05, 0.075, 0.10, and 0.15 wt%) to evaluate friction, anti-wear, and extreme pressure properties. The tribological test was conducted as per ASTM standard using four-ball tester. The test results showed that with the addition of MWCNTs, the friction and wear properties of PAOs had been improved significantly as compared to the base oils. It was also observed that MWCNTs exhibited excellent anti-wear properties than friction properties. The possible reasons for the improvement in friction and wear properties are discussed with the aid of various analytical tools.

scholarly journals Friction and Wear Properties of Improved Polyurethane Based Magneto-Rheological Elastomer

2012 ◽  
Vol 28 (6) ◽  
pp. 333-339 ◽  
Author(s):  
Chenglong Lian ◽  
Sung-Geun Hong ◽  
Kwang-Hee Lee ◽  
Chul-Hee Lee ◽  
Cheol-Hyun Kim
Keyword(s):  
Friction And Wear ◽  
Wear Properties ◽  
Friction And Wear Properties ◽  
Magneto Rheological

Relationships between the thermal stability, friction, and wear properties of reactively sputtered Si–aC:H thin films

2002 ◽  
Vol 17 (11) ◽  
pp. 2888-2896 ◽  
Author(s):  
Ryan D. Evans ◽  
Gary L. Doll ◽  
Jeffrey T. Glass
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Friction And Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Wear Performance ◽  
Transfer Films ◽  
Friction And Wear Properties ◽  
Pin On Disk ◽  
Thermal Stability Of

The friction and wear performance were correlated with the thermal stability of reactively sputtered Si–aC:H thin films containing various Si and H concentrations. The average steady-state friction coefficients as measured by dry sliding pin-on-disk tests decreased with increasing Si and H content. Furthermore, the films with high Si and H formed thick transfer films as compared to the films with little or no Si and H content. Minimums in average ball abrasion rate and average film wear rate were observed at the Si/C = 0.10 film composition. The most intense and distinct “graphitic” Raman peaks were collected from the Si/C = 0.10 transfer film debris. In addition, the Si/C = 0.10 film also had the most distinguishable graphitic Raman signature after annealing in air at 500 °C compared to the other Si–aC:H films, suggesting a possible relationship between the nature of transfer films resulting from dry sliding in air and the bulk films that were annealed in air.

The Analysis on the Tribological Properties of TPU/PVC Blends with Chrome-Plated Steel under Dry Sliding

2014 ◽  
Vol 915-916 ◽  
pp. 193-197
Author(s):  
Cheng Long Wang ◽  
Dao Yuan Pan ◽  
Qi Bing Wang ◽  
Rui Fang Zhao ◽  
Yu Zeng Zhang
Keyword(s):  
Friction And Wear ◽  
Operating Conditions ◽  
Dry Sliding ◽  
Wear Properties ◽  
Transportation Equipment ◽  
Hydraulic Steering ◽  
Pros And Cons ◽  
Friction And Wear Properties ◽  
Technology Comparison ◽  
Better Than

It is based on actual working conditions and parameters of the hydraulic steering gear, to reach the purpose of the optimizing rubber by different rubbers mixing technology. Comparison the five kinds rubber and metal of the friction characteristics in dynamic fit, obtained a performance excellent rubber in the specific operating conditions. Then improve the overall service life of the transportation equipment. It is first prepared the same hardness TPU and PVC and blends that is ratio of 2:8, 5:5and8:2 in this article. The pros and cons of the five rubbers are analyzed by friction and wear properties of the above experimental. The test curve of coefficient friction and wear with time has been done under different load at constant low speed, friction and wear and wear mechanism of five rubbers with chrome-plated steel comparatively analyses to determine TPU/PVC = 8:2 blends has the heat resistance and wear resistance are better than TPU and PVC under dry sliding conditions.

scholarly journals Friction and Wear Properties of CrAl-Based Coatings for Nuclear Fuel Cladding

2021 ◽  
Vol 9 ◽  
Author(s):  
Biao Ma ◽  
Bin Luo ◽  
Zhuozheng Wang ◽  
Chuiyi Meng ◽  
Xiujie He
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Water Environment ◽  
Wear Depth ◽  
Fuel Cladding ◽  
Wear Properties ◽  
Wear Performance ◽  
Al Content ◽  
The Coefficient Of Friction ◽  
Wear Tests

Friction and wear performance is one of the key mechanical properties of accident tolerant fuel cladding coatings. In this study, reciprocating sliding wear tests had performed on two types of CrAl and CrAlN coatings with two different Al content ratios and Zr-4. The coefficient of friction, wear depth, and abrasion loss were measured and compared. The results indicated that the CrAl-based coatings improve the wear behavior significantly and nitrogen has an obvious improvement on the wear resistance of the coating. The friction and wear performance was also studied in a water environment. The results show that the presence of water degrade the wear performance of Zr-4 and CrAl coatings but ameliorates the friction and wear performance of CrAlN coatings. The feasibility of depositing ATF coating on conventional Zr-4 substrates to mitigate the influence of grid-to-rod fretting was demonstrated.

Friction and wear properties of three different steels against paper-based friction material

2019 ◽  
Vol 71 (10) ◽  
pp. 1206-1212
Author(s):  
Jianpeng Wu ◽  
Biao Ma ◽  
Heyan Li ◽  
Chengnan Ma
Keyword(s):  
Working Conditions ◽  
Friction And Wear ◽  
Friction Material ◽  
Wear Depth ◽  
Wear Properties ◽  
Heavy Load ◽  
Friction Materials ◽  
Content Type ◽  
Light Load ◽  
Friction And Wear Properties

Purpose The purpose of this paper is to study friction and wear properties of three types of steels against paper-based friction disc, including 65Mn, 20#steel and 30CrAl, so as to obtain the appropriate working conditions for different friction materials in the transmission system. Design/methodology/approach Based on actual working conditions, pin-on-disc tests are conducted on a universal material tester. The two evaluation indexes, including average friction coefficient and variation coefficient, are introduced to analyze the different friction properties among three types of steel. Furthermore, the temperature-dependent wear pattern and wear depth are subsequently studied. Findings The results show that 65Mn is more suitable for working under heavy load and low velocity, but 30CrAl and 20#steel are suitable for working under light load and high velocity. Moreover, wear primarily occurs on paper-based material and peaks at about 325. Practical implications This research of different materials and friction property for friction pairs is helpful to improve the performance and prolong the service life of transmission systems. Originality/value Suitable working conditions of different friction materials are obtained, and the correlation between wear and decomposition in high temperature is verified.

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