Friction and Wear Performance of the New Ceramic Anti-Wear Agent Containing N-B-Mo under Various Loads

2020 ◽  
Vol 1001 ◽  
pp. 169-174
Author(s):  
Xu Guo Huai ◽  
Xiao Wei Fan
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Friction Pair ◽  
Optical Microscope ◽  
Lubricating Oil ◽  
Wear Property ◽  
X Ray Diffraction ◽  
The Coefficient Of Friction ◽  
Lubricating Property

The friction and wear experiment employed M-2000 friction and wear tester which friction pair made up of Q235//GCr15 steel, and lubricating oil which contains 3% new N-B-Mo ceramic anti-wear agent was adopted as the medium. The effect of content of new ceramic anti-wear agent on friction and wear property was investigated by using X-Ray diffraction (XRD), optical microscope (OM), et al, and the mechanism of ceramic anti-wear agent was also analyzed. The results showed that in the range of 50-300N load, the friction coefficient is basically related to the size of the load, and the greater the load, the greater the coefficient of friction, the size of the wear rate is not simply increased as the load increases. The wear rate was lowest when the load was 200N. Under this load, the new N-B-Mo ceramic anti-wear agent was generated BN phase which has self-lubricating property at worn surface, reduce the friction coefficient of Q235//GCr15 friction pair and the wear rate of Q235 steel, plays an anti-friction and anti-wear role.

scholarly journals Study on Friction and Wear Properties of Pantograph Strip/Copper Contact Wire for High-Speed Train

2014 ◽  
Vol 8 (1) ◽  
pp. 125-128 ◽  
Author(s):  
Tao Ding ◽  
Wenjing Xuan ◽  
Qiudong He ◽  
Hao Wu ◽  
Wei Xiong
Keyword(s):  
Wear Rate ◽  
Electric Current ◽  
High Speed ◽  
Friction And Wear ◽  
Optical Microscope ◽  
Wear Properties ◽  
Contact Wire ◽  
Arc Erosion ◽  
The Coefficient Of Friction ◽  
Friction And Wear Properties

A series of experiments on friction and wear properties of carbon strip rubbing against copper contact wire is performed on high-speed friction and wear tester with electric current. The results show that the friction coefficient is generally maintained between 0.24 and 0.37. In the absence of electric current, the coefficient of friction is higher than that in the presence of electric current. The wear rate of carbon strip materials is generally not more than 0.014g/km. In particular, the wear rate under the electric current of 240 A is 14 times more than that in the absence of electric current. By observing the scar of worn surface with optical microscope, it can be found that there are obvious slip scars and arc erosive pits. The dominated wear mechanisms are abrasive wear and arc erosion in electrical sliding frictional process.

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 Loads on the Wear Properties of La2O3-MoSi2 Composite against SiC at Elevated Temperature

2011 ◽  
Vol 415-417 ◽  
pp. 2138-2141
Author(s):  
Si Yong Gu ◽  
Hou An Zhang ◽  
Chun Shi
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Wear Mechanisms ◽  
Friction And Wear ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Sliding Speed ◽  
X Ray

Wear behaviours of La2O3-MoSi2composite against SiC under different loads at 1000°C and 0.126m/s sliding speed in air were investigated by using an XP-5 type high temperature friction and wear tester. The worn surfaces and phase of the sample were observed by scanning election microscopy (SEM) and X-ray diffraction (XRD), respectively. Results showed that friction coefficient and wear rate of La2O3-MoSi2composite and SiC decreased with the increase of loads. The wear mechanisms of La2O3-MoSi2composite are oxidation, adhesion abrasion and fatigue pitting.

Deposition and Characterization of D-Gun Sprayed WC-Co Coating with Self-Lubricating Property

2007 ◽  
Vol 544-545 ◽  
pp. 215-218
Author(s):  
Hao Du ◽  
Chao Sun ◽  
Jun Gong ◽  
Soo Wohn Lee
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Wear Track ◽  
Wear Property ◽  
Ni Powder ◽  
Lubricating Property ◽  
Detonation Gun

A WC-Co coating with self-lubricating property was deposited by detonation gun (D-gun) process, using a WC-Co powder doped with a MoS2-Ni powder, under a proper spray condition. It is proved that the MoS2 composition was kept in the resulting coating by SEM, XRD and EPMA. Evaluation on sliding wear property indicates that the MoS2 composition plays an important role in lowering both coefficient of friction and wear rate for the resulting coating, which is confirmed by observations on wear track. It suggests that the deposition of WC-Co coating with self-lubricating property by D-gun spray is feasible by controlling lubricant powder and spray conditions, which can exhibit higher sliding wear resistance.

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.

Friction and Wear Behaviors of Si3N4 Sliding against M50 Bearing Steel in Vacuum

2010 ◽  
Vol 97-101 ◽  
pp. 1681-1684 ◽  
Author(s):  
Yong Xing Tong ◽  
Li Qin Wang ◽  
Le Gu
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Critical Load ◽  
Friction And Wear ◽  
Applied Load ◽  
High Vacuum ◽  
Optical Microscope ◽  
Bearing Steel ◽  
Specific Wear Rate ◽  
Si3n4 Ceramics

The friction and wear performances of Si3N4 ceramics sliding against bearing steel and to find optimal operating condition against M50 bearing steel couples under high vacuum surroundings were investigated. The tests were studied on the ball-disk machine under different loads and steady sliding velocity. The worn surfaces of tested samples were examined using optical microscope，SEM and XPS. The results showed that the friction coefficient of Si3N4 was decided by the applied load, the critical load of Si3N4’ friction coefficient was 10N applied load; The critical load of Si3N4’ specific wear rate was 5N applied load, the specific wear rate of Si3N4 drop rapidly as the applied load exceeded the critical load; The dominant wear mechanisms of Si3N4 ceramics were adhesion wear, brittle facture and furrow wear in vacuum.

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.

Tribological Characteristics of Amorphous Hydrogenated DLC in the Presence of Commercial Lubricating Oil

2015 ◽  
Vol 642 ◽  
pp. 179-183
Author(s):  
K.A.H. Al Mahmud ◽  
M.A. Kalam ◽  
H.H. Masjuki ◽  
H.M. Mobarak
Keyword(s):  
Wear Rate ◽  
Coefficient Of Friction ◽  
Friction And Wear ◽  
Fuel Efficiency ◽  
Testing Machine ◽  
Lubricating Oil ◽  
Dlc Coating ◽  
Coated Plate ◽  
Different Temperatures ◽  
The Coefficient Of Friction

Currently diamond like carbon (DLC) coatings application for automotive components is becoming a favorable strategy to cope with new challenges faced by automotive industries. DLC coating is very effective to lower the coefficient of friction and wear rate, which in turn could improve fuel efficiency and durability of the engine components. Commercially available fully formulated lubricating oils are specially produced to enhance the lubrication of ferrous materials. Therefore, nonferrous coating (DLC) interaction with commercial lubricating oil needs to be investigated. In this current investigation, coefficient of friction and wear rate were investigated by ball on plate tribo testing machine at different temperatures in the presence of SAE 40 lubricating oil. At high test temperature coefficient of friction decreases, however wear rate increases for the a-C:H coated plate, however, steel/steel contact shows opposite trend of coefficient of friction and wear rate change.

Evaluation of tribological properties of Ceiba pentandra (kapok) seed oil as an alternative lubricant

2018 ◽  
Vol 70 (3) ◽  
pp. 506-511 ◽  
Author(s):  
S. Shankar ◽  
M. Manikandan ◽  
G. Raja
Keyword(s):  
Wear Rate ◽  
Coefficient Of Friction ◽  
Friction And Wear ◽  
Oxidation Stability ◽  
Mineral Oil ◽  
Optical Microscope ◽  
Content Type ◽  
Mineral Oils ◽  
Ceiba Pentandra ◽  
The Coefficient Of Friction

Purpose The decrease in availability of mineral oils and their environmental hazards created the need to search for alternate bio-based oils. The aim of this study is to investigate the friction and wear characteristics of kapok (Ceiba pentandra) oil as a bio-lubricant. Design/methodology/approach The wear and friction characteristics between steel-steel contact under lubrication were found using a pin-on-disk tribometer under different loads and sliding speeds, respectively. The corrosion and oxidation stability of the test lubricants were also analyzed. The worn surfaces of the specimen are analyzed with the help of an optical microscope. The obtained results were compared with palm oil and mineral oil (SAE20W 40). Findings From the investigation, it is found that the kapok oil possess a lower coefficient of friction and wear rate than palm and mineral oil. It is also found that the coefficient of friction varies proportionally and the wear rate varies inversely with the sliding speed as expected. Originality/value The present results confirm that the kapok oil can be used as an alternative lubricant to reduce the demand for mineral-based oil lubricants.

Investigations of tribodynamic characteristics of chrome steel pin against plain and textured surface cast iron discs in lubricated conditions

2019 ◽  
Vol 16 (4) ◽  
pp. 560-568 ◽  
Author(s):  
Roop Lal ◽  
R.C. Singh
Keyword(s):  
Cast Iron ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Lubricating Oil ◽  
Textured Surface ◽  
Interface Stability ◽  
Content Type ◽  
Chrome Steel ◽  
Plain Surface

Purpose The purpose of this paper was to carry out an experimental study to investigate tribodynamics at the interface of chrome steel pin with the plain and textured surface cast iron discs in a fully flooded condition. Design/methodology/approach A friction and wear tester (tribometer) was used for conducting the experiment at different operating parameters. Lubricating oil used in this experiment was SAE-15W40, which directly supplied at the interface and ensured a fully flooded lubricating condition. Measurements of different parameters, such as friction coefficient, the rate of wear, the amplitude of vibration, rise in temperature and intensity of sound, were considered at different loads. The input parameters were taken in a range viz. Loads from 1.9 MPa to 3.1 MPa, sliding speeds from 2 to 10 m/s and distance travelled ranged from 1000 to 5000 m. Findings In the investigation, it was found that there was a decrease in friction coefficient and wear rate at the interface formed by the chrome steel pin with textured surface cast iron disc when compared with friction coefficient and wear rate at the interface formed by the chrome steel pin and the plain surface disc of cast iron. Originality/value Also, it was inferred that temperature, vibration and noise level, at the interface formed by the chrome steel pin and plain surface cast iron disc, increased, which governed the interface stability. The novelty of this investigation lies in the identification of the parameters on which interface stability depends.

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