Tribological Characteristics of Surface Treatment for Piston Pin

2009 ◽  
Vol 79-82 ◽  
pp. 2199-2202 ◽  
Author(s):  
Joon Ho Seo ◽  
Jin Yong Kim ◽  
Seung Uk Park ◽  
Hyun Chul Kim ◽  
Byung Chul Na ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Measuring System ◽  
Optical Surface ◽  
Connecting Rod ◽  
Low Friction ◽  
Automotive Engine ◽  
The Face

The piston pin contact in a typical automotive engine is an example of a highly loaded. Therefore, for piston pin design several aspects are important. Among them are function, cost, NVH, fuel economy, durability, and impact on other design aspects of the engine. Continuously contacting with piston pin, the face of connecting rod, brings about abnormal wear such as unfairwear or earlywear. because the engine get more powered and one requirement for a good fuel economy is to achieve a low level of mechanical friction. In this study, modern low friction coatings and treatment at the piston pin interface aimed to investigate the potential. The profile of coated specimens were observed by non-contact type optical surface measuring system and the friction-wear behaviors of coated specimens were investigated by using piston pin wear tester. Piston pin wear test was performed to analyze the friction and wear behavior. The results showed that the application of low friction coatings and treatment effectively improved tribological performance of the piston pin

Research on Friction and Wear Behavior of Rubber in the Mixture of Crude Oil with Water

2013 ◽  
Vol 300-301 ◽  
pp. 1254-1258 ◽  
Author(s):  
Xiao Ren Lv ◽  
Xu Yao Huo ◽  
Guang Zu Qu ◽  
Shi Jie Wang
Keyword(s):  
Crude Oil ◽  
Water Content ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Frictional Coefficient ◽  
Water Film ◽  
Wear Test ◽  
Wear Behaviour ◽  
Wear Loss ◽  
Butadiene Rubber

In order to choose the rubber material and improve the service life of Progressing Cavity Pump (PCP ) when exploiting offshore crude oil, it is important to analyze friction and wear behaviour of stator and rotor of PCP in the mixture of crude oil with different water content. The friction and wear test about Nitrile -Butadiene Rubber (NBR) and Fluorine Rubber (FKM) were carried on ring-on-block tester, the wear loss was observed by electron microscope, the wear mechanism was also discussed. The results show that: (1) FKM owns better wearing resistance than NBR in the mixture of crude oil with different water content; (2) when the content of water in the mixture is less than 26%, the frictional coefficient of sample is 0.05, due to the oil film between the friction pairs; (3) when the content of water in the mixture is more than 26%, the frictional coefficient increases to 0.4, because of the water film between the friction pairs.

Unlubricated Sliding Wear of TiN Particle Reinforced Si3N4 Matrix Composites Against AISI-52100 Steel Ball

2007 ◽  
Vol 280-283 ◽  
pp. 1327-1330
Author(s):  
Chien Cheng Liu ◽  
Jow Lay Huang
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Matrix Composites ◽  
Wear Properties ◽  
Low Friction ◽  
Friction Coefficients ◽  
A Value ◽  
Aisi 52100 ◽  
Ceramic Components ◽  
Aisi 52100 Steel

The effects of TiN addition to Si3N4 on its mechanical and wear properties were investigated. The size and content of TiN particles were found having effects on the strength and toughness of Si3N4-based composites. The friction and wear behavior of Si3N4 based composites against AISI-52100 steel were investigated in the ball -on- disc mode in a non-lubrication reciprocation motion. It has been found that under the conditions used all the ceramic components exhibited rather low friction and wear coefficients. For monolithic silicon nitride materials, high friction coefficients between 0.6 and 0.7 and wear coefficients between 1.63 × 10-8 and 1.389 × 10-6 mm3/N.m were measured. The contact load was varied from 100 to 300 N. By adding titanium nitride, the friction coefficients was reduced to a value between 0.4 and 0.5 and wear coefficients between 1.09×10-8 and 0.32×10-6 mm3/N.m at room temperature.

scholarly journals Modification of Surface Topography and Analysis of Its Impact on Friction and Wear Reduction of Sliding Contact

2019 ◽  
Vol 9 (1S3) ◽  
pp. 23-26
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Surface Texturing ◽  
Wear Test ◽  
Sliding Contact ◽  
Surface Textures ◽  
Sliding Direction ◽  
Pin On Disc ◽  
Interacting Surfaces ◽  
The Impact

Proper lubrication and surface modification are key factors to improve the tribological behavior of interacting sliding surfaces under lubricated conditions. Surface texturing of interacting surfaces has found to be an emerging technique that modifies the surfaces deterministically by producing surface features in the form of surface asperities or grooves with specific shape, size and distribution. The present paper address the impact of positive surface textures (protrusions) and number of positive textures in the sliding direction on friction and wear behavior of parallel sliding contacts. The square shaped positive surface textures are created on the specimen by ink-jet followed by chemical etching process. The sliding experiments are conducted on pin on disc friction and wear test rig by providing different sliding conditions such as plain dry, plain with lubricant and textures with lubricant between the interacting surfaces. The results indicated that the textures with lubricated condition exhibit lower friction and wear compared to other two conditions. Furthermore, it is reported that among the tested samples, the textured sample with number of textures three in sliding direction has shown a prominent effect in reducing friction and wear of parallel sliding contact.

scholarly journals Molecular Coverage Determines Sliding Wear Behavior of n-Octadecylphosphonic Acid Functionalized Cu–O Coated Steel Disks against Aluminum

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 280
Author(s):  
Stephan Prünte ◽  
Denis Music ◽  
Velislava L. Terziyska ◽  
Christian Mitterer ◽  
Jochen M. Schneider
Keyword(s):  
Sliding Wear ◽  
Friction And Wear ◽  
Surface Coverage ◽  
Wear Behavior ◽  
Coated Steel ◽  
Low Friction ◽  
Phosphonic Acids ◽  
Asperity Contacts ◽  
Sliding Distance ◽  
Octadecylphosphonic Acid

The sliding wear behavior of Cu–O coated steel disks functionalized with n-octadecyl-phosphonic acids was evaluated against aluminum in ball-on-disk tribometer experiments. After 5 m of sliding the friction coefficient of the functionalized sample with maximum molecular coverage is ≤0.3 ± 0.1. Surfaces with lower coverage mitigate friction and wear as well exhibiting initially similar low friction coefficients but reveal the breakdown of lubrication for sliding distances <5 m. The length of the low friction sliding distance before breakdown scales with the coverage of n-octadecylphosphonic acids on the Cu–O surface. Coverage hence determines the tribological behavior of the functionalized surface against sliding aluminum. As the coverage is increased, detrimental asperity contacts between the rubbing surfaces are reduced.

On the Sliding Wear Behavior of PAEK Composites in Vacuum Environment

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Géraldine Theiler ◽  
A. P. Harsha ◽  
Thomas Gradt
Keyword(s):  
Carbon Fibers ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Vacuum Chamber ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Low Friction ◽  
Test Conditions ◽  
Aisi 52100 ◽  
Pin On Disk

In the present study, the tribological behavior of polyaryletherketones (PAEKs) and their composites was investigated in air and vacuum environment. Polymer matrices were filled with either glass or carbon fibers and compared with a standard bearing material containing 10% carbon fiber (CF), 10% graphite, and 10% polytetrafluoroethylene (PTFE). The samples were tested in a pin-on-disk configuration under continuous sliding against a rotating steel disk (AISI 52100) at different sliding speeds. The results indicated that the tribological performance of these materials in vacuum depends on both compositions and test conditions. At low sliding speed, a very low friction and wear coefficients were obtained while at higher speed, severe wear occurred. In particular, CF filled composites showed excessive wear that led to the ignition after opening the vacuum chamber. Experimental results are discussed by analyzing the transfer film and wear debris.

Tribological Behavior of Polyimide/Zinc Oxide Hybrid Films

2010 ◽  
Vol 105-106 ◽  
pp. 438-440 ◽  
Author(s):  
Bin Liu ◽  
Zu Hua Yang ◽  
Jian Song Zhou
Keyword(s):  
Zinc Oxide ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Solution Process ◽  
Wear Test ◽  
Zno Films ◽  
Hybrid Films ◽  
Polyimide Films ◽  
Reducing Ability ◽  
Surface Morphologies

A series of polyimide/ZnO films were successfully prepared via a solution process. The friction and wear behavior of the hybrid polyimide films in dry sliding against Si3N4 ball was examined on a DF-PM ball-on-block unidirectional friction and wear test rig. The worn surface morphologies of the films were observed with a scanning electron microscope. It was found that the introduction of zinc oxide led to improving the tribological characteristics and thermal stability of the polyimide films. The polyimide/zinc oxide hybrid films had much better friction-reducing ability and wear-resistance than the neat PI film.

Wear Resistance of Nano-ZrO2 Ceramic for Hip Joint Head Prostheses

2010 ◽  
Vol 105-106 ◽  
pp. 175-178 ◽  
Author(s):  
Chen Wang ◽  
Li Min Dong ◽  
Qing Feng Zan ◽  
Pen Guo ◽  
Jie Mo Tian
Keyword(s):  
Wear Resistance ◽  
Hip Joint ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Test Block ◽  
Test Machine ◽  
Friction Test ◽  
Gcr15 Steel ◽  
Artificial Hip Joint

By using the ring-block friction and wear machine, the friction and wear behavior of nano-ZrO2 ceramic test block against GCr15 steel test ring has been studied. At the same time, friction and wear test of 45# steel block against GCr15 steel ring has also been conducted for comparison. By using self-made test machine for the wear ability of the hip joint, the friction test of nano-ZrO2 ceramic hip joint head against ultra-high molecular weight polyethylene (UHMWPE) acetabulum has been done, the friction test of Co-Cr-Mo alloy hip joint head against UHMWPE acetabulum has also been made for comparison. The results show that the friction factor of nano-ZrO2 ceramic test block against GCr15 steel test ring is less 37.3% than that of 45# steel block against GCr15 steel ring, the wear weight of nano-ZrO2 ceramic test block against GCr15 steel test ring is only 0.76% of that of 45# steel block against GCr15 steel ring. The wear weight of UHMWPE acetabulum against nano-ZrO2 ceramic hip joint head is 61.5% of UHMWPE acetabulum against Co-Cr-Mo alloy hip joint head. This indicates nano-ZrO2 ceramic has good wear resistance property and is the ideal materials for artificial Hip joint head Prostheses.

Numerical and experimental investigations on the wear behavior of water-lubricated bearings with different materials

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Liwu Wang ◽  
Yanfeng Han ◽  
Dongxing Tang ◽  
Jianlin Cai
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Coupling Model ◽  
Mixed Lubrication ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Wear Depth ◽  
Content Type ◽  
Polyether Ether Ketone

Purpose The purpose of this paper is to verify the effectiveness of the proposed transient mixed lubrication and wear coupling model [mixed lubrication and wear (MLW) coupling model] under water lubricated conditions by comparing with the experimental results. Design/methodology/approach Water lubricated bearings are the key parts of the transmission system of an underwater vehicle and some surface ships. In this study, the friction and wear behaviors of rubber, nylon and polyether ether ketone (PEEK) samples with stainless steel underwater lubrication were compared by using ring-block contact structure on multifunctional friction and wear test bench-5000 friction and wear tester. Findings The results show that the transient wear depth and wear amount of PEEK, nylon and rubber samples under water lubrication are in good agreement with the calculated results of the theoretical model, which verifies the rationality and scientific nature of the MLW coupling model. Thus, the numerical model is applicable for the wear prediction of the journal bearing under water-lubricated conditions. Furthermore, numerical and experimental results reveal that the anti-wear performance among three water-lubricated materials can be ranked by: PEEK > nylon > rubber. Originality/value It is expected that this study can provide more information for experimental and numerical research of water-lubricated bearings under water-lubricated conditions.

A Mechanism Design of Friction and Wear Test Based on Liquid Medium

2013 ◽  
Vol 703 ◽  
pp. 212-216
Author(s):  
Wei Wu Zhao ◽  
Xiang Yu ◽  
Zhi Hang Luo ◽  
Jie Ai ◽  
Xi An Zhao
Keyword(s):  
Liquid Medium ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
In Situ Observation ◽  
Wear Properties ◽  
Properties Of Materials ◽  
Friction And Wear Properties ◽  
Ball On Disc

Friction and wear tester is an important device for detecting friction and wear properties of materials. There is inadequacy of research on friction and wear behavior of geological drilling mechanisms serving under complicated liquid circumstances like water, oil and mortar. This article describes an accessory mechanism for commonly used ball-on-disc tribometer which can be applicable in liquid medium. A new oil cup is designed and composed of oil cup sleeve, oil cup lid, transition station, worktable and etc. Interference connection is adopted between oil cup and rotary test bench of tester. Materials are chosen so as to meet requirement from actual working conditions and to simulate the friction and wear test in liquid medium. The mechanism designed share characters of convenient operation, in-situ observation and friendly environment.

Temperature effect of friction and wear characteristics for solid lubricating graphite

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540018
Author(s):  
Yeonwook Kim ◽  
Jaehoon Kim
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Hot Gas ◽  
Lubricating Film ◽  
Effective Lubricant ◽  
Worn Surface ◽  
Sealing Materials ◽  
Friction And Wear Characteristics ◽  
Lubricating Properties

Graphite is one of the effective lubricant additives due to its excellent high-temperature endurance and self-lubricating properties. In this study, wear behavior of graphite used as sealing materials to cut off hot gas is evaluated at room and elevated temperature. Wear occurs on graphite seal due to the friction of driving shaft and graphite. Thus, a reciprocating wear test to evaluate the wear generated for the graphite by means of the relative motion between a shaft material and a graphite seal was carried out. The friction coefficient and specific wear rate for the changes of applied load and sliding speed were compared under different temperature conditions considering the actual operating environment. Through SEM observation of the worn surface, the lubricating film was observed and compared with test conditions.

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