Effect of Counterpart's Surface Micromorphology on Tribological Behavior of Nylon under Dry Sliding Contact

2011 ◽  
Vol 199-200 ◽  
pp. 615-619
Author(s):  
Chuan Hui Huang ◽  
Ming Ding ◽  
Hua Zhu
Keyword(s):  
Surface Roughness ◽  
Friction And Wear ◽  
Tribological Behavior ◽  
Transfer Film ◽  
Sliding Contact ◽  
Dry Sliding ◽  
Primary Mechanism ◽  
Surface Micromorphology ◽  
Friction Temperature ◽  
Steel Disc

This paper investigated the friction and wear behaviors of nylon rubbing against steel discs with helical, parallel and multidirectional textures respectively. The results indicated that friction coefficient, friction temperature and wear rate of couple using helical texture steel disc as counterpart were higher than others. Abrasive wear was the primary mechanism of the three couples. Nylon surface roughness increased after rubbing against helical texture steel disc, but decreased after rubbing against parallel and multidirectional texture steel discs. The roughness of both helical and multidirectional texture steel discs increased slightly after test, while the roughness increase of parallel textual steel disc was significant only at regions perpendicular to the rotating direction due to adhesion of nylon transfer film.

A Surface Analytical Study of the Effects of Water and Oxygen on Tribological Behavior of DLC Films

2005 ◽  
Author(s):  
O. L. Eryilmaz ◽  
A. Erdemir ◽  
J. A. Johnson ◽  
N. Mehta ◽  
B. Prorok
Keyword(s):  
Surface Chemistry ◽  
Friction And Wear ◽  
Analytical Study ◽  
Tribological Behavior ◽  
Mechanistic Explanation ◽  
Sliding Contact ◽  
Diamond Like Carbon ◽  
Near Surface ◽  
X Ray ◽  
Contact Surfaces

In this study, we explored the effects of water and oxygen molecules on friction and wear of diamond-like carbon (DLC) films. Specifically, using Raman and x-ray photoelectron spectroscopies we attempted to analyze the near surface chemistry and microstructure of sliding contact surfaces and correlated these findings with changes in friction and wear of DLC films. Tribological tests were run in a ball-on-disk machine under 2 to 5 N loads and in dry and moist nitrogen and oxygen environments. Based on the tribological and surface analytical findings, a mechanistic explanation is provided for the high friction and wear of DLC in dry and humid oxygen environments.

Friction and Wear Characteristics of Spherical Plain Bearings with PTFE Woven Liners

2011 ◽  
Vol 199-200 ◽  
pp. 763-766 ◽  
Author(s):  
Ming Qiu ◽  
Zhi Lun Gao ◽  
Guo Feng Wang ◽  
Long Chen
Keyword(s):  
Friction And Wear ◽  
Dry Sliding ◽  
Wear Depth ◽  
Heavy Load ◽  
Comprehensive Performance ◽  
Increasing Trend ◽  
Friction Temperature ◽  
Spherical Plain Bearing ◽  
Friction And Wear Characteristics

The friction and wear behaviors of three kinds of spherical plain bearings with PTFE woven liners were investigated by a high oscillating frequency and heavy load tribo-tester. Dry sliding tests were carried out at an oscillating frequency of 1.2Hz and four different loads. With the help of SEM and EDS, the differences of worn surfaces of the three kinds were investigated. The results indicate that the wear depth and friction temperature for the three kinds of bearings show increasing trend with the increasing of load, while the friction coefficient is the opposite. The comprehensive performance of bearing II is the best in the whole course of experiment, while the bearing III is the worst. The adhesive and abrasive wear mechanisms are appeared on the surface of liners. The quality of boning influences the tribological property of the spherical plain bearing.

Mechanical and Tribological Properties of Al2O3-ZrO2 Based Composites Prepared by EPD

2012 ◽  
Vol 507 ◽  
pp. 191-195 ◽  
Author(s):  
Pavol Hvizdoš ◽  
Viktor Puchý ◽  
Daniel Drdlík ◽  
Jaroslav Cihlář
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Friction And Wear ◽  
Tribological Behavior ◽  
Dry Sliding ◽  
Depth Sensing ◽  
Wear Rates ◽  
Mechanical And Tribological Properties ◽  
Pin On Disc ◽  
Indentation Methods

Alumina and both tetragonal and cubic zirconia based composites with various volume fractions of constituents as well as with addition of carbon nanofibers were prepared by EPD. Mechanical properties (hardness, Youngs modulus) were measured by depth sensing indentation methods and related to chemical composition. Tribological behavior was studied using pin-on-disc technique at room temperatures in air at dry sliding. Coefficient of friction and wear rates were measured, the types of wear regimes were observed and damage micromechanisms identified.

Tribological behavior of high-density polyethylene in dry sliding contact with ion-implanted CoCrMo

1999 ◽  
Vol 114 (1) ◽  
pp. 19-28 ◽  
Author(s):  
B.A Kehler ◽  
N.P Baker ◽  
D.H Lee ◽  
C.J Maggiore ◽  
M Nastasi ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Tribological Behavior ◽  
High Density ◽  
Sliding Contact ◽  
Dry Sliding ◽  
Ion Implanted

EFFECTS OF SURFACE PREPARATION ON FRICTION AND WEAR IN DRY SLIDING CONDITIONS

Tribologia ◽  
2017 ◽  
Vol 272 (2) ◽  
pp. 25-31
Author(s):  
Andrzej DZIERWA
Keyword(s):  
Surface Topography ◽  
Friction And Wear ◽  
Normal Load ◽  
Surface Preparation ◽  
Wear Volume ◽  
Dry Sliding ◽  
Initial Surface ◽  
Steel Disc ◽  
Similar Range ◽  
Sliding Distance

Wear tests were conducted using a ball-on-disc tester T-11. In the experiment, a 42CrMo4 rotating steel disc with a hardness of 40±2 HRC was placed in contact with a 100Cr6 steel ball with a diameter of 6.35 [mm]. The hardness of the ball was set to 62±2 HRC. Finishing treatment applied to the surfaces was sand blasting. Disc samples were prepared to obtain surfaces in similar range of the Sa parameter (arithmetical mean height of the surface) but other surface topography parameters vary. Dry sliding tests were conducted at sliding speeds of v1 = 0.16; v2 = 0.24 i v3 = 0.32 [m/s]. The sliding distance was set to 282.6 [m], and the normal load was set to 9.81 [N]. During the tests, the friction force was monitored as a function of time. Disc and ball wear was measured after the tests using a white light interferometer Talysurf CCI Lite. Profiles were taken in four positions (900 apart) perpendicular to the wear track. Then, using an interferometer software program TalyMap Gold 6.0, they were computed and averaged. It was found that the initial surface topography has a significant influence on friction and wear levels under dry sliding conditions. It was also identified the correlation between several surface topography parameters and wear volume.

Paper 21: Measurements of Friction and Wear under Conditions of Dynamic Excitation

1967 ◽  
Vol 182 (14) ◽  
pp. 175-182
Author(s):  
K. Barker ◽  
H. Kaliszer ◽  
G. W. Rowe
Keyword(s):  
Experimental Study ◽  
Shear Strength ◽  
Friction And Wear ◽  
Sliding Contact ◽  
Impulsive Force ◽  
Metal Interface ◽  
Heavy Load ◽  
Dynamic Excitation ◽  
Interfacial Contact ◽  
Steel Disc

An experimental study is being made of the friction and wear of pins of different materials in sliding contact with a rotating mild steel disc. A load is applied by dead weights and the excitation is introduced either by out-of-balance in the wheel or by an electromechanical vibrator attached to the loading arm. Stepless speed variation up to 60 ft/s is provided. The friction force, temperature, and worn volume are recorded continuously. Under light loads a synchronous impulsive force appears to decrease the shear strength of the lubricant–metal interface, whereas under a heavy load it does not have a significant effect on the interfacial contact. Synchronous vibrations alter the wear pattern of a phosphor-bronze pin. The running-in period is extended, but the final wear rate is greater. Changes in the running-in characteristics of a steel pin are not observed.

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