Friction and Wear Behaviors of Steel Ball Against Polyimide-PTFE Composite Under Rolling-Sliding Motion

2021 ◽  
Vol 69 (3) ◽  
Author(s):  
Yuanyuan Jiang ◽  
Lei Chen ◽  
Chen Xiao ◽  
Ningning Zhou ◽  
Tao Qing ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Steel Ball ◽  
Ptfe Composite ◽  
Sliding Motion

Friction and Wear Behaviours of Polyimide Composites Against Steel Ball Under Rolling-Sliding Compound Motion

2021 ◽  
Author(s):  
Yuanyuan Jiang ◽  
Lei Chen ◽  
Chen Xiao ◽  
Ningning Zhou ◽  
Tao Qing ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Strong Influence ◽  
Steel Ball ◽  
Thermal Treatments ◽  
Surface Wear ◽  
Tribochemical Reactions ◽  
Sliding Motion ◽  
Polyimide Composites ◽  
Sliding Test ◽  
Lubrication Conditions

Abstract Wear of polyimide composites cage due to lubrication failure has a significant impact on the lifetime of bearing, but the related mechanisms are still far from understanding due to the complex movements of bearing parts, such as rolling, sliding et al, in the real operations. Here, the tribological behaviors of polyimide composites against steel ball were studied under a motion compounded with rolling and sliding in comparison with pure sliding. The rolling-sliding motion has a strong influence on the tribological properties of polyimide composites depending on lubrication conditions. Especially under PAO4 oil lubrication, the rolling-sliding motion can facilitate the degradation of polyimide composites, resulting in severe surface wear and aboundant black products forming. The analysis based on XPS and SEM measurements and the compared results from heating sliding test and thermal treatments indicates that the formation of black products is mainly attributed to the tribochemical reactions accompanying with the rupture of C-O and C=O bonds due to high frictional temperature. This process is further facilitated when the PAO4 oil and the metal from counterface participate in the tribochemical reactions.

MeV Self Ion Beam Induced Amorphisation of Silicon Carbide Surfaces and Its Effect on Their Trdbomechanical Propertdzs

1991 ◽  
Vol 235 ◽  
Author(s):  
D. K. Sood ◽  
V. C. Nath ◽  
Yang Xi
Keyword(s):  
Silicon Carbide ◽  
Raman Scattering ◽  
High Precision ◽  
Friction And Wear ◽  
Ion Beam ◽  
Steel Ball ◽  
Carbon Ions ◽  
Ion Energy ◽  
Number Of Cycles ◽  
Tribomechanical Properties

ABSTRACTAmorphisation of sintered SiC by bombardment with self (C, Si) ions has been studied. Ion doses ranged from 1×1015 to 1×1017 ions/cm2; and ion energy was varied from 0.09 to 5 MeV. Amorphisation was detected by micro-focus Raman scattering. Tribomechanical properties-friction and wear were studied with a high precision pin (steel ball) and disc (implanted) machine. Results show substantial improvements in friction and wear, which persist to a large number of cycles. Tribomechanical properties are shown to correlate with surface amorphisation and carburisation. Carbon ions are found to be much more effective than Si ions (with similar damage distributions) in reducing friction and wear.

Materials characterization and effect of purity and ion implantation on the friction and wear of sublimed fullerene films

1994 ◽  
Vol 9 (11) ◽  
pp. 2823-2838 ◽  
Author(s):  
B.K. Gupta ◽  
Bharat Bhushan ◽  
C. Capp ◽  
J.V. Coe
Keyword(s):  
Fourier Transform ◽  
Elastic Modulus ◽  
Ion Implantation ◽  
Coefficient Of Friction ◽  
Friction And Wear ◽  
Steel Ball ◽  
Scanning Tunneling ◽  
High Dose ◽  
Wear Life ◽  
Plastic Deformation Behavior

In previous studies, sublimed C60-rich fullerene films on silicon, when slid against a 52100 steel ball under dry conditions, have exhibited low coefficient of friction (∼0.12). Films with different purities can be produced by sublimation at different substrate temperatures. In this paper, effects of purity of fullerene films and ion implantation of the films with Ar ions on the friction and wear properties of sublimed fullerene films are reported. C60-rich films (called here films with high purity) exhibit low macroscale friction. An increased amount of C70 and impurities in the fullerene film determined using Raman and Fourier transform infrared (FTIR), increases its coefficient of friction. Microscale friction measurements using friction force microscopy also exhibited similar trends. Low coefficient of friction of sublimed C60-rich films on silicon is probably due to the formation of a tenacious transfer film of C60 molecules on the mating 52100 steel ball surface. Based on scanning tunneling microscopy (STM), transmission electron microscopy (TEM), and high resolution TEM (HRTEM), we found that fullerene films primarily consisted of C60 molecules in a fcc lattice structure. Nanoindenter was used to measure hardness and elastic modulus of the as-deposited films. Ion-implantation with 1 × 1016 Ar+ cm−2 reduced macroscale friction down to about 0.10 from 0.12 with an increase in wear life by a factor of 4; however, doses of 5 × 1016 ions cm−2 gave three times higher friction and poorer wear life; higher doses disintegrated the C60 molecules. Based on STM, TEM, Raman, FTIR, and laser desorption Fourier-transform ion cyclotron resonance mass spectrometer (LD/FT/ICR) studies, we found that the ion implantation with a dose of 1 × 1016 Ar+ cm−2 resulted in smoothening of the fullerene film surface probably by compacting clusters, but without disintegrating the C60 molecules. However, a high dose of 5 × 1016 Ar+ cm−2 damaged the C60 molecules, converting it to an amorphous carbon. Nanoindentation studies show that ion implantation with a dose of 1 × 1016 Ar+ cm−2 resulted in an increase in the hardness from about 1.2 to 4.0 GPa and in elastic modulus from about 70 to 75 GPa and modified the elastic-plastic deformation behavior.

Experimental Investigation of the Influence of Machining Condition on the Contact Sliding Behavior of Metals

1998 ◽  
Vol 120 (2) ◽  
pp. 395-400 ◽  
Author(s):  
Dae-Eun Kim ◽  
Dong-Hwan Hwang
Keyword(s):  
Surface Roughness ◽  
Experimental Investigation ◽  
Friction And Wear ◽  
Dimensional Accuracy ◽  
Tribological Performance ◽  
Cutting Condition ◽  
Sliding Motion ◽  
Machined Parts ◽  
Friction And Wear Characteristics ◽  
Counter Surface

In many instances machined parts experience sliding motion while in contact with a counter surface. The performance of the contacting parts depends on their friction and wear characteristics. In this work the effects of the machining condition on the tribological performance of steel, brass, and duralumin are investigated. For steel, it is shown that the friction coefficient value remains about the same whereas the rate of wear varies as the cutting condition is altered. The friction coefficients for brass and duralumin were lower than that of steel and their tribological properties seem to be less sensitive to the machining condition. In conclusion, it is emphasized that the machining condition directly influences the surface integrity which in turn affects the tribological performance of the machined parts, and therefore, the machining condition for parts that experience contact sliding motion should be optimized for best tribological performance in addition to dimensional accuracy and surface roughness.

The friction and wear of Ni–P–PTFE composite deposits under water lubrication

2003 ◽  
Vol 77 (3) ◽  
pp. 755-764 ◽  
Author(s):  
Ming Der Ger ◽  
K.H Hou ◽  
L.M Wang ◽  
Bing Joe Hwang
Keyword(s):  
Friction And Wear ◽  
Water Lubrication ◽  
Ptfe Composite ◽  
Composite Deposits

Effects of Surrounding Humidity on the Friction and Wear Properties of Electroless Ni-P-PTFE Composite Coating.

2001 ◽  
Vol 52 (2) ◽  
pp. 233-235 ◽  
Author(s):  
Makoto HINO ◽  
Minoru HIRAMATSU ◽  
Masato TSUJIKAWA ◽  
Makoto KAWAMOTO ◽  
Kei DEMIZU
Keyword(s):  
Composite Coating ◽  
Friction And Wear ◽  
Wear Properties ◽  
Ptfe Composite ◽  
Friction And Wear Properties ◽  
Electroless Ni

FRICTION PROCESSES OF SELECTED POLYMERS SLIDING ON STEEL AND DURALUMIN IN A LUBRICANT ENVIRONMENT

Tribologia ◽  
2016 ◽  
Vol 268 (4) ◽  
pp. 201-210 ◽  
Author(s):  
Wojciech WIELEBA ◽  
Tadeusz LEŚNIEWSKI ◽  
Darhan ELEMES ◽  
Ainur ELEMES
Keyword(s):  
Friction And Wear ◽  
Friction Pair ◽  
Polymeric Materials ◽  
Test Results ◽  
Hydraulic Systems ◽  
Sliding Surfaces ◽  
Sliding Motion ◽  
316L Steel ◽  
Gear Pumps ◽  
Engineering Polymers

The article presents the results of tribological research into engineering polymers (POM, PEEK, PPS) cooperating in sliding motion with 316L steel and EN AW-2017A aluminium alloy in the presence of a liquid (water, hydraulic oil HLP68). This type of friction pair may occur in hydraulic systems (gear pumps, valves, etc.). For comparison, additionally, the results of tribological research carried out in dry friction conditions have been shown. In addition, the results of microscopic study of the sliding surfaces of polymeric materials have been presented. Analysis of the test results allows one to describe the processes of friction and wear of the studied sliding pairs.

Electroless Ni-P-PTFE Composite Coatings on Titanium Alloy and Their Tribological Properties

2011 ◽  
Vol 291-294 ◽  
pp. 12-17 ◽  
Author(s):  
Zhong Dong Yang ◽  
Di Wu ◽  
Meng Fei Liu
Keyword(s):  
Titanium Alloy ◽  
Friction And Wear ◽  
Composite Coatings ◽  
Wear Properties ◽  
Ptfe Composite ◽  
Composite Plating ◽  
Lubricating Property ◽  
Plating Solution ◽  
Friction And Wear Properties ◽  
Electroless Ni

In this study, it was the first attempt to fabricate Ni-P-PTFE composite coatings on titanium alloy (manufactured through electroless composite plating). The effects of suspended PTFE concentration, temperature and surfactant concentration in the plating solution on the PTFE content in the resulting coatings were investigated. In addition, the friction and wear properties of the samples were analyzed. The results showed that co-deposition of Ni-P and PTFE can obviously decrease the friction coefficient of the coatings, reduce wear and improve lubricating property of the coatings.

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