Investigation of the Tribological Characteristics of ZCuPb20Sn5 and No.45 Steel under Emulsion Lubrication

2011 ◽  
Vol 338 ◽  
pp. 603-606
Author(s):  
Zhen Hui Luan ◽  
Ming Ding ◽  
Xiang Fei Wu
Keyword(s):  
Electron Microscope ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Scanning Electron Microscope ◽  
Friction And Wear ◽  
Friction Pair ◽  
Tribological Characteristics ◽  
Oil Lubrication ◽  
Worn Surface ◽  
Scanning Electron

As friction pair, ZCuPb20Sn5 and No.45 steel are most in use in gear motor under oil lubrication. In order to investigate the tribological characteristics of ZCuPb20Sn5 and No.45 steel under emulsion lubrication, the authers tested them on MMW-1 friction and wear tester with sample pin and thrust ring. The relationships between the friction coefficient and the load, the friction coefficient and the speed, the wear rate and the load, the wear rate and the speed were provided. The worn surface of ZCuPb20Sn5 were investigated by means of scanning electron microscope. The results showed that, alone with the raising of the load and the speed, the wear rate of ZCuPb20Sn5 increased, but the friction coefficient reduced.

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.

Effect of Sliding Speed on Wear Property of MoSi2 at High Temperature

2011 ◽  
Vol 66-68 ◽  
pp. 150-154
Author(s):  
Hou An Zhang ◽  
Si Yong Gu
Keyword(s):  
Electron Microscope ◽  
High Temperature ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Wear Property ◽  
Sliding Speed ◽  
X Ray ◽  
Very High ◽  
Scanning Electron

Wear behaviors of MoSi2against Al2O3or SiC under 30N at 1000°C in air have been investigated by using an XP-5 type High Temperature Friction and Wear Tester. The worn surfaces and phases of samples were characterized by scanning electron microscope (SEM) and X-ray diffractometer, respectively. Result shows the wear rate and friction coefficient of MoSi2decreases with the increase of sliding speed. SiC is superior to Al2O3as the counter-face materials of MoSi2. Serious adhesion leads to very high wear rate of Al2O3in this experiment. SiC shows a surprising mass weighing phenomenon, which is caused by oxidation. The main wear mechanism of MoSi2against Al2O3is oxidation and adhesion. However when against SiC, it is chiefly controlled by grinding.

Tribological Investigation of Guanidinium Ionic Liquids as Lubricants for Steel/Bronze Contacts

2016 ◽  
Vol 852 ◽  
pp. 1046-1049
Author(s):  
Gui Qin Yu ◽  
Kuo Yang ◽  
Jian Jun Liu ◽  
Yong Min Liang
Keyword(s):  
Ionic Liquids ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Friction Pair ◽  
Liquid Paraffin ◽  
Wear Test ◽  
Lubrication Mechanism ◽  
Thermal Stabilities ◽  
X Ray ◽  
Scanning Electron

Two kinds of guanidinium ionic liquids were synthesized. The thermal stabilities of the ionic liquids were evaluated by a hermogravimetric analyzer. Their tribological properties were investigated and compared with alkyl imidazole ionic liquids and liquid paraffin by SRV friction-wear test. The images of worn surfaces were observed under scanning electron microscope. X-ray photoelectron spectrometer analysis was carried out to explore the lubrication mechanism. The results showed that guanidinium ionic liquids were the best lubricants among the tested lubricants for steel/bronze contacts. Complex tribochemical reactions occurred during the sliding process and boundary lubrication films formed on the bronze/steel friction pair interface.

scholarly journals Tribological Properties of Al-Based Composites Reinforced with Fullerene Soot

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6438
Author(s):  
Firuz Yunusov ◽  
Tatiana V. Larionova ◽  
Oleg Tolochko ◽  
Alexander D. Breki
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Composite Materials ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Pure Aluminum ◽  
Fullerene Soot ◽  
Scanning Electron

Aluminum-based composite materials reinforced with fullerene soot, which is a mixture of fullerene and amorphous carbon, are promising materials for friction and wear applications. Composite materials: aluminum with 2% fullerene soot (f.s) and Al with 2% f.s and 2% Cu were obtained via mechanical milling followed by hot pressing. The tribological properties (friction and wear) of the listed composites were investigated and compared with the results for pure aluminum obtained under similar conditions. It has been shown that the addition of fullerene soot reduces the friction coefficient by 25%. At additional alloying with copper, the friction coefficient decreased by 35% in comparison with pure aluminum and also lad to a decrease in friction fluctuations. The wear rate of composite Al with 2% f.s decreased twice in comparison with that of pure aluminum, and with additional alloying it decreased 2.5 times. The morphology of the wear surfaces was investigated by scanning electron microscopy (SEM). The influence of fullerene soot and additional alloying on the wear mechanism was shown.

THE INFLUENCE OF THE FRICTION PAIR LOAD ON TRIBOLOGICAL CHARACTERISTICS OF POLYMER COMPOSITES IN RECIPROCATING MOTION

Tribologia ◽  
2016 ◽  
Vol 266 (2) ◽  
pp. 111-120
Author(s):  
Zbigniew PAWELEC
Keyword(s):  
Electron Microscopy ◽  
Friction Coefficient ◽  
Polymer Composites ◽  
Friction Pair ◽  
Cutting Tools ◽  
Tribological Characteristics ◽  
Reciprocating Motion ◽  
Molybdenum Disulphide ◽  
Wear And Friction ◽  
Scanning Electron

This paper presents the influence of the friction pair load on the wear and friction coefficient of polymer composites in reciprocating motion. The tested polymer composites are used in regeneration purposes of supports in cutting tools. Tribological characteristics were evaluated for composites modified with graphite and molybdenum disulphide as the additives (modifiers). The tests were performed by the use of T-17 tribotester under conditions of various loads (100, 150, 200 N), with a frequency of 1 Hz, and the 20 000 cycles of 25 mm amplitude. The friction pairs were lubricated with standard machine oil. For comparison purposes, the tribological characteristics of steel-steel configuration were performed. The mechanism of friction pair wear was evaluated by the analysis with scanning electron microscopy (SEM). The results have shown that the increase in the load of friction pair affects the friction coefficient only restrainedly. The polymer regeneration composites designed for flat guide rails in cutting machines proved to be more useful and resistant than the steel-steel combination.

Friction and Wear Studies of Articular Cartilage: A Scanning Electron Microscope Study

1975 ◽  
Vol 97 (3) ◽  
pp. 358-366 ◽  
Author(s):  
I. C. Clarke ◽  
R. Contini ◽  
R. M. Kenedi
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Friction And Wear ◽  
Published Data ◽  
Hip Joints ◽  
Wear Model ◽  
Scanning Electron Microscope Study ◽  
Fluid Environment ◽  
Friction And Wear Characteristics ◽  
Scanning Electron

The friction and wear characteristics of human hip joints were investigated using a pendulum-device and the Scanning Electron Microscope (SEM). The frictional phenomena of the joints oscillating under a variety of conditions were integrated with published data to provide a composite picture. As an accelerated “wear” model, joints were run “dry”, i.e., no fluid environment. This “wear” model was less severe than anticipated and subsequent damage involved only the superficial regions of the cartilage bearing material. The disruption occurred at sites where osteoarthritic damage has been detected clinically and progressed along the orientated fibrillar layers and was therefore oriented predominantly perpendicularly to joint motion.

Effect of Ultrasonic Vibration on Friction and Wear Properties of GCr15/45# Steel Frictional Pairs under Oil Lubrication

2011 ◽  
Vol 295-297 ◽  
pp. 2102-2105 ◽  
Author(s):  
Yu Lin Qiao ◽  
Shan Lin Yang ◽  
Yan Zang ◽  
Dong Wang
Keyword(s):  
Friction Coefficient ◽  
Ultrasonic Vibration ◽  
Friction And Wear ◽  
Friction Reduction ◽  
Wear Volume ◽  
Oil Lubrication ◽  
Wear Properties ◽  
Friction And Wear Properties ◽  
Surface Morphologies ◽  
Scanning Electron

Ultrasonic vibration friction and wear experiments were carried out by MFT-R4000 reciprocating friction and wear tester bonded with ultrasonic device. The surface morphologies of wear scars were examined by scanning electron microscope (SEM). The influences of ultrasonic vibration on friction reduction and anti-wear properties of GCr15/45# steel frictional pairs under different loads were discussed. The experimental results showed that, the friction of GCr15/45# steel frictional pairs could be reduced by ultrasonic vibration, and the reduction of friction coefficient became more obvious as the loads increasing. The friction coefficient measured under ultrasonic vibration is 12% lower than it measured without ultrasonic vibration when the load was 50N. However, the wear of frictional pairs increased under ultrasonic vibration, and the amplitude of wear volume enlarged with the loads increase, which is 63% at the load of 50N.

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