scholarly journals Tribological Performance of Nanocomposite Carbon Lubricant Additive

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 149 ◽  
Author(s):  
Chuanyi Xue ◽  
Shouren Wang ◽  
Daosheng Wen ◽  
Gaoqi Wang ◽  
Yong Wang
Keyword(s):  
Friction And Wear ◽  
Frictional Contact ◽  
Adhesive Wear ◽  
Friction Pair ◽  
Lubricant Additive ◽  
Suspension Stability ◽  
Wear Performance ◽  
Base Oil ◽  
Test Conditions ◽  
Friction And Wear Characteristics

In this research, nanocomposite carbon has been found to have excellent tribological properties as a lubricant additive. To reduce high friction and wear in friction pairs, the modified nanocomposite carbon has been prepared for chemical technology. The morphology and microstructure of the modified nanocomposite carbon were investigated via TEM, SEM, EDS, XPS, and Raman. In this study, varying concentrations (1, 3, and 5 wt. %) within the modified nanocomposite carbon were dispersed at 350 SN lubricant for base oil. The suspension stability of lubricating oils with the modified nanocomposite carbon was determined by ultraviolet-visible light (UV-VIS) spectrophotometry. The friction and wear characteristics of lubricants containing materials of the modified nanocomposite carbon were evaluated under reciprocating test conditions to simulate contact. The morphology and microstructure of the friction pair tribofilms produced during frictional contact were investigated via SEM, EDS, and a 3D surface profiler. The results showed that scratches, pits, grooves, and adhesive wear were significantly reduced on the surface of the friction pair which was used with 3% nanocomposite carbon lubricant. Additionally, the modified nanocomposite carbon showed excellent friction reducing and anti-wear performance, with great potential for the application of anti-wear.

TRIBOLOGICAL PERFORMANCE OF MODIFIED FLOCCULENT GRAPHITE AS LUBRICANT ADDITIVES

2019 ◽  
Vol 27 (02) ◽  
pp. 1950108
Author(s):  
CHUAN YI XUE ◽  
SHOU REN WANG ◽  
JIN FENG LENG ◽  
YONG WANG ◽  
GAO QI WANG
Keyword(s):  
Friction And Wear ◽  
Piston Ring ◽  
Gasoline Engine ◽  
Adhesive Wear ◽  
Friction Pair ◽  
Cylinder Liner ◽  
Lubricant Additive ◽  
Suspension Stability ◽  
Wear Performance ◽  
Friction And Wear Characteristics

In this research, graphite has been found to have excellent tribological properties as a lubricant additive. To reduce high friction and wear in cylinder liner piston ring friction pairs, modified flocculent graphite have been prepared via chemical technology. The morphology and microstructure of modified flocculent graphite were investigated via SEM, EDS, XRD and IR. In this study, varying concentrations (0.1, 0.5, and 0.9 wt.%) within modified flocculent graphite were dispersed at 350 SN lubricant for Gasoline Engine. Suspension stability of the lubricating oils with modified flocculent graphite and graphite as determined by ultraviolet-visible light (UV-VIS) spectrophotometry. The friction and wear characteristics of lubricants containing materials of modified flocculent graphite were evaluated under reciprocating test conditions to simulate contact. The morphology and microstructure of the friction pair tribofilms produced during frictional contact were investigated via SEM, EDS and a 3D surface profiler. The results show that scratching, pits, furrows and adhesive wear took place, respectively, on the worn surfaces of friction pairs. But, modified flocculent graphite showed excellent friction reducing and anti-wear performance and subsequently has great potential for the application of anti-wear.

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.

scholarly journals Friction and Wear Characteristics of 18Ni(300) Maraging Steel under High-Speed Dry Sliding Conditions

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1485
Author(s):  
Kun Sun ◽  
Weixiang Peng ◽  
Binghui Wei ◽  
Longlong Yang ◽  
Liang Fang
Keyword(s):  
Maraging Steel ◽  
High Speed ◽  
Friction And Wear ◽  
Adhesive Wear ◽  
Dry Sliding ◽  
X Ray Diffraction ◽  
X Ray ◽  
Friction And Wear Characteristics ◽  
Increasing Load ◽  
Worn Surfaces

18Ni(300) maraging steel, which has exceptional strength and toughness, is used in the field of aviation and aerospace. In this paper, using a high-speed tribo-tester, tribological behaviors of 18Ni(300) maraging steel were investigated under high-speed dry sliding conditions. Morphology of the worn surfaces and the debris was analyzed by scanning electron microscope, and the oxides of worn surfaces caused by friction heat were detected by X-ray diffraction. The experiment results reveal that the friction coefficient of frictional pairs declines with increasing load and speed. With the speed and load increasing, oxides of the worn surfaces of 18Ni(300) maraging steel change from FeO to Fe3O4 and the wear mechanism converts from adhesive wear into severe oxidative or extrusion wear.

scholarly journals Tribological properties of synthetic base oil containing polyhedral oligomeric silsesquioxane grafted graphene oxide

RSC Advances ◽  
2018 ◽  
Vol 8 (42) ◽  
pp. 23606-23614 ◽  
Author(s):  
Bo Yu ◽  
Kai Wang ◽  
Yiwen Hu ◽  
Feng Nan ◽  
Jibin Pu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Lubricating Oil ◽  
Wear Performance ◽  
Base Oil ◽  
Oligomeric Silsesquioxane

The dispersion of graphene-based materials in lubricating oil is a prerequisite for improving its friction and wear performance.

scholarly journals Nano Serpentine Powders as Lubricant Additive: Tribological Behaviors and Self-Repairing Performance on Worn Surface

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 922 ◽  
Author(s):  
Binbin Wang ◽  
Zhaodong Zhong ◽  
Han Qiu ◽  
Dexin Chen ◽  
Wei Li ◽  
...  
Keyword(s):  
Dynamic Balance ◽  
Liquid Paraffin ◽  
Lubricant Additive ◽  
Tribological Performance ◽  
Wear Scar Diameter ◽  
Base Oil ◽  
Steel Balls ◽  
Worn Surface ◽  
Friction And Wear Characteristics

Natural serpentine powders are applicable as additives for various lubricating oils. However, no uniform theories explain their tribological performance, lubrication, and wear mechanism, especially their self-repairing mechanism. Herein, the influence of different nano serpentine powders (NSPs) contents in liquid paraffin on the friction and wear characteristics of steel balls and the self-repairing process of NSPs on the worn surface were studied. Results show that the optimal amount of NSPs was 0.5 wt %. Relative to those of the base oil, the friction coefficients and wear spot diameters were reduced by 22.8% and 34.2%, respectively. Moreover, the long-term tribological test shows that the wear scar diameter decreased slightly after 3 h, reaching the state of dynamic balance between wear and repair. The outstanding tribological performance should be attributed to the formed bilayer tribofilm, the first layer of which contains nanoparticles surrounded by lubricants and the second layer of which contains nanoparticles compacted onto the surface of the steel ball.

scholarly journals Tribological Behavior of Lamellar Molybdenum Trioxide as a Lubricant Additive

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2427 ◽  
Author(s):  
Wei Tang ◽  
Rui Liu ◽  
Xiangyong Lu ◽  
Shaogang Zhang ◽  
Songyong Liu
Keyword(s):  
Friction And Wear ◽  
Molybdenum Trioxide ◽  
Tribological Behavior ◽  
Normal Load ◽  
Lubricant Additive ◽  
Base Oil ◽  
Reducing Ability ◽  
Wear Reduction ◽  
Friction Reducing ◽  
Friction And Wear Tests

In this study, the tribological behavior of lamellar MoO3 as a lubricant additive was investigated under different concentrations, particle sizes, normal loads, velocity, and temperature. The friction and wear tests were performed using a tribometer and with a reciprocating motion. The results indicate that the friction-reducing ability and antiwear property of the base oil can be improved effectively with the addition of lamellar MoO3. The 0.5 wt % and 0.1 wt % concentrations of MoO3 yield the best antifriction and antiwear effects, respectively. The maximum friction and wear reduction is 19.8% and 55.9%, compared with that of the base oil. It is also found the MoO3 additive can decrease the friction considerably under a high velocity and normal load, and increase the working temperature. The smaller the size of MoO3, the better the friction-reducing effect the lamellar MoO3 shows. The friction-reducing and antiwear mechanisms of lamellar MoO3 were discussed.

Experimental Research of Scuffing of Friction Pair

2014 ◽  
Vol 697 ◽  
pp. 254-257
Author(s):  
Jie Lin Xu ◽  
Zeng Xiong Peng ◽  
Nan Wang ◽  
Shan Lin Xu
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
High Speed ◽  
Friction And Wear ◽  
Friction Pair ◽  
Common Phenomenon ◽  
Working Pressure ◽  
Wear Characteristics ◽  
Worn Surface ◽  
Friction And Wear Characteristics

The scuffing of friction pair is a common phenomenon in conditions of high speed and pressure. It was researched on scuffing characteristics in this paper. By using UMT-3 friction and wear tester, the friction and wear characteristics of slipper pair material in hydraulic component were investigated, and the friction coeficient-speed curves in the different pressures were got, as well as the wear rate-speed curves. The worn surface morphology of pin specimen was photographed by SEM, and the formation mechanism of the worn surface was analyzed. The results suggested that: friction coefficient and wear rate would have a jump when the scuffing occurred, the friction and wear characteristics would be affected by the interaction of pressure (P) and speed (V) . The PV characteristic restricted the correlation between working pressure and speed.

scholarly journals Design and development of a novel sliding friction and wear tester with complex working conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jinrong Chai ◽  
Zihao Zhou ◽  
Cheng Ye ◽  
Chen Yao ◽  
Guohua Li
Keyword(s):  
Abrasive Wear ◽  
Working Conditions ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Adhesive Wear ◽  
Corrosive Wear ◽  
Wear Testing ◽  
Test Conditions ◽  
Wear Tests ◽  
Wear Condition

AbstractSerious wear phenomena occur in mining machinery under complex working conditions, and the wear of machine parts is primarily caused by the synergistic effect of adhesive wear, abrasive wear, corrosive wear, etc. However, the existing friction and wear testing equipment cannot be used to carry out wear tests under complex working conditions. To simultaneously meet the test requirements of adhesive wear, abrasive wear, and corrosive wear, a novel sliding friction and wear tester that can simulate complex working conditions was developed in the present research. The tester is composed of a loading mechanism, a speed-regulating mechanism, a corrosion chamber, and a control and display system. Wear tests of the middle plate of a scraper conveyor, a key equipment of coal mining, were carried out to verify the consistency and effectiveness of the tester. The test results were consistent, and those under the same test conditions were similar with a maximum standard deviation of 2.4 mg. The wear condition of the middle plate specimens was close to the actual wear condition of the middle plate. Moreover, the surfaces of the middle plate specimens after grinding exhibited obvious adhesive, abrasive, and corrosive wear characteristics, and the wear degrees of the specimens under the same test conditions were similar. The quality loss of the middle plate specimens was found to increase with the increase of coal gangue percentage, and the main wear mechanism was the synergistic action of abrasive, adhesive, and corrosive wear.

Tribological Property of Biocarbon-Based Magnesium Silicate Hydroxide Nanocomposite as Lubricant Additive at Different Concentrations of Additive and Dispersant

2020 ◽  
Vol 143 (7) ◽  
Author(s):  
Rongqin Gao ◽  
Wenbo Liu ◽  
Qiuying Chang ◽  
Hao Zhang ◽  
Yang Liu
Keyword(s):  
Electron Microscope ◽  
Friction And Wear ◽  
Magnesium Silicate ◽  
Lubricant Additive ◽  
Tribological Performance ◽  
Third Body ◽  
Wear Performance ◽  
Optimal Value ◽  
Friction Surfaces ◽  
Scanning Electron

Abstract The tribological performance of biocarbon-based magnesium silicate hydroxide nanocomposite was examined as a lubricant additive by using a four-ball friction and wear tester. The effect of different concentrations of additives and dispersants was evaluated. The results show the nanocomposite exhibits excellent anti-wear performance and the optimal value is proposed when the content of additive and dispersant is 0.7 wt% and 3 wt% respectively. Through analyzing the friction surfaces by scanning electron microscope and Raman, we proposed the additives acted by a combination of “bearing,” “third body,” and sliding effect to achieve outstanding tribological properties.

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