The Friction and Wear of Thin, Sintered, Fluoride Films

1972 ◽  
Vol 94 (1) ◽  
pp. 12-18 ◽  
Author(s):  
M. T. Lavik ◽  
B. D. McConnell ◽  
G. David Moore
Keyword(s):  
Friction Coefficient ◽  
Friction And Wear ◽  
Room Temperature ◽  
Wear Behavior ◽  
Strong Dependence ◽  
Aluminum Phosphate ◽  
Friction And Wear Behavior ◽  
Wear Life ◽  
Compositional Changes ◽  
Cure Temperature

Results are presented for the bonding of thin, sintered, fluoride films of BaF2 and CaF2 with mono-aluminum phosphate. Friction and wear behavior of these films has been defined in terms of film compositional changes, film curing procedures, and substrate variations when subjected to varying levels of temperature and load. Mono-aluminum phosphate was found to greatly enhance the adhesion of the sintered fluoride film. There was a strong dependence of wear life at 1000 deg F on the mono-aluminum phosphate content of the film. Films containing 6 vol. percent phosphate appear to be near optimum and exhibited wear lives of 1,000,000 load cycles under sliding conditions in a dual rub-shoe device with friction coefficient levels in the order of 0.10 to 0.20. Near-optimum values were determined for cure temperature (950 deg C), and surface finish (23 μ in. rms) on rhodium-plated substrates. Graphite and gold were added to the aluminum phosphate bonded BaF2: CaF2 films. Both additives were found to lower the friction coefficient at room temperature.

Friction and Wear Behavior of Polypropylene/Montmorillonite Intercalated Nanocomposites

2011 ◽  
Vol 311-313 ◽  
pp. 92-95 ◽  
Author(s):  
Kui Chen ◽  
Tian Yun Zhang ◽  
Wei Wei
Keyword(s):  
Stainless Steel ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Abrasive Wear ◽  
Wear Mechanisms ◽  
Mass Fraction ◽  
Friction And Wear ◽  
Adhesive Wear ◽  
Wear Behavior ◽  
Friction And Wear Behavior

Polypropylene/organo-montmorillonite (PP/OMMT) composites were investigated by XRD. Friction and wear behaviors of this composites sliding against GCr15 stainless steel were examined on M-2000 text rig in a ring-on-block configuration. Worn surfaces of PP and its composites were analyzed by SEM. The result shows that PP macromolecule chains have intercalated into OMMT layers and form intercalated nanocomposites. With the increase of mass fraction of OMMT, both wear rate and friction coefficient of composites first decrease then rise. With the increase of load, from 150 N, 200 N to 250 N, wear rate of composites increases, while friction coefficient reduces. The wear mechanisms of composites are connected with the content of OMMT. Composites were dominated by adhesive wear, abrasive wear and adhesive wear accompanied by abrasive wear respectively with the increase of OMMT content.

Friction and Wear Behavior of Polyetherimide(PEI) Filled With Polytetrafluoroethylene(PTFE)

2010 ◽  
Author(s):  
LiQin Wang ◽  
JianWei Sun ◽  
Le Gu
Keyword(s):  
Friction Coefficient ◽  
Dry Friction ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Surface Hardness ◽  
Tribological Performance ◽  
Friction Condition ◽  
Test Rig ◽  
Friction And Wear Behavior ◽  
Ring Configuration

The tribological performance of Polyetherimide (PEI) composites filled with different Polytetrafluoroethylene (PTFE) content was comparatively evaluated on MM-200 test rig in block-on-ring configuration under dry friction condition. The microstructures of worn surfaces, fractured surfaces and wear mechanisms of the PEI composite were examined under scanning electron microscope (SEM). The variations of elastic modulus and surface hardness with variation in composition were also investigated. The results showed that under conditions of dry friction the PTFE can lower the friction coefficient and reduce wear of the PEI composites. When filled with 10 wt. % PTFE, the composite had the lowest wear rate. For PEI filled with 5wt. % PTFE the friction coefficient was about 0.3 and remained comparatively stable with increase of the PTFE content.

Study on the Friction and Wear Behavior of Grind-Hardened Layer

2010 ◽  
Vol 431-432 ◽  
pp. 385-388 ◽  
Author(s):  
Jian Hua Zhang ◽  
Pei Qi Ge ◽  
Lei Zhang ◽  
Yang Yu ◽  
Hui Li
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Wear Debris ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Hardened Layer ◽  
Hardened Steel ◽  
Wear Performance ◽  
Friction And Wear Behavior ◽  
Grind Hardening

The grind-hardening technology utilizes the grinding heat to harden the surface of the workpiece. The friction and wear performance of the grind-hardened layer is one of the important parameters. In this paper, the friction and wear performance of the grind-hardened layer was studied by the friction and wear experiment. The wear rate and the friction coefficient of the grind-hardened steel were studied by comparing with conventional hardened steel and non-hardened steel. The surface worn morphology and the collected wear debris of the grind-hardened steel were observed during the experiment. The wear mechanism of the grind-hardened steel was analyzed under different friction conditions.

scholarly journals Friction and Wear Behavior of Polyimide Composites Reinforced by Surface-Modified Poly-p-Phenylenebenzobisoxazole (PBO) Fibers in High Ambient Temperatures

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1805
Author(s):  
Yu ◽  
Zhang ◽  
Tang ◽  
Gao
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Specific Wear Rate ◽  
Interface Properties ◽  
Sliding Velocity ◽  
Friction And Wear Behavior ◽  
Ambient Temperatures

(1) In order to improve the properties of antifriction and wear resistance of polyimide (PI) composite under high temperature conditions, (2) 3-Aminopropyltriethoxysilane (APTES) and Lanthanum (La) salt modifications were employed to manufacture poly-p-phenylenebenzobisoxazole (PBO)/PI composites with different interface properties. The representative ambient temperatures of 130 and 260 °C were chosen to study the friction and wear behavior of composites with different interface properties. (3) Results revealed that while both modification methods can improve the chemical activity of the surface of PBO fibers, the La salt modification is more effective. The friction coefficient of all composites decreases with the increase of sliding velocity and load at two temperatures, and the specific wear rate is increases. Contrary to the situation in the 130 °C environment, the wear resistance of the unmodified composite in the 260 °C environment is greatly affected by the sliding velocity and load, while the modified composites are less affected. Under the same test parameters, the PBO–La/PI composite has the lowest specific wear rate and friction coefficient, and (4) La salt modification is a more effective approach to improve the properties of antifriction and wear resistance of PI composite than APTES modification in high ambient temperatures.

Effect of Nano Sodium Titanate Whisker and Aramid Pulp on the Friction and Wear Behavior of Resin-Based Brake Material

2021 ◽  
Vol 1016 ◽  
pp. 1121-1126
Author(s):  
Zhong Zheng Pei ◽  
Ren Bo Song ◽  
Jie Xu ◽  
Yi Fan Feng ◽  
Ke Guo
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Impact Energy ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Sodium Titanate ◽  
Friction And Wear Behavior

The dependence of friction and wear behavior on nanosodium titanate whisker and aramid pulp in a designed resin-based brake material was systematically analyzed. Higher contents of aramid pulp enhanced the hardness of the brake materials. In addition, the maximum impact energy of the material reached 0.392 J/cm2 where the ratio of aramid pulp to sodium titanate whisker is 0.75. At same time, the friction coefficient was stable between 0.38 and 0.45, and the wear rate was 5%. The samples with higher contents of nanosodium titanate whiskers and aramid pulp showed more uniform furrows, fewer delaminated craters, more moderate layers transfer and more stable contact plateaus.

Friction and wear behavior of hydrogenated diamond-like carbon coating against titanium alloys under large normal load and variable velocity

2017 ◽  
Vol 69 (2) ◽  
pp. 199-207 ◽  
Author(s):  
Jun Liu ◽  
Zhinan Zhang ◽  
Zhe Ji ◽  
Youbai Xie
Keyword(s):  
Friction Coefficient ◽  
Service Life ◽  
Carbon Coating ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Normal Load ◽  
Diamond Like Carbon ◽  
Content Type ◽  
Friction And Wear Behavior ◽  
Dlc Coating

Purpose This paper aims to investigate the effects of reciprocating frequency, large normal load on friction and wear behavior of hydrogenated diamond-like carbon (H-DLC) coating against Ti-6Al-4V ball under dry and lubricated conditions. Design/methodology/approach The friction and wear mechanisms are analyzed by scanning electron microscope, energy dispersive spectroscopy and Raman spectroscopy. Findings The results show that as reciprocating frequency increases under lubricated conditions, the friction coefficient decreases first and then increases. When the reciprocating frequency is 2.54 Hz, the value of friction coefficient reaches the minimum. The friction reduction is because of the transformation from sp3 to sp2, the formation of transfer layer on Ti-6Al-4V ball and the reduction in viscous friction, whereas the increase of friction coefficient is related to wear. In dry conditions, the friction coefficient is between 0.06 and 0.1. And, the service life of H-DLC coating decreases with the increase in reciprocating frequency and normal load. Research limitations/implications It is confirmed that adding the lubricant could prolong the service life of H-DLC coating and reduce friction and wear efficiently. And, the wear mechanisms under dry and lubricated conditions encompass abrasive wear and adhesive wear. Originality/value The results are helpful for application of diamond-like carbon coating.

Study on Tribology Performance and Wear Controlling of 9Cr2Mo Steel

2010 ◽  
Vol 139-141 ◽  
pp. 414-417 ◽  
Author(s):  
Xiao Ming Jia ◽  
Jin Rong Chai
Keyword(s):  
Friction Coefficient ◽  
Tool Steel ◽  
Dry Friction ◽  
Friction And Wear ◽  
Solid Lubricant ◽  
Cutting Tool ◽  
Wear Behavior ◽  
Friction Process ◽  
Friction And Wear Behavior ◽  
Tribology Performance

9Cr2Mo steel is widely used as measuring and cutting tool steel. The friction and wear behavior of 9Cr2Mo steel was investigated under dry friction and solid lubricant by wear tester. The experiment results show that the friction coefficient of 9Cr2Mo steel is 0.34~0.58 under dry friction and 0.035~0.06 under solid lubricant. With the increase of load , the friction coefficient decreases and the wearing capacity increases under two kinds of conditions. The wearing capacity of 9Cr2Mo steel under solid lubricant is great lower than it under dry friction. The friction process is smooth under solid lubricant. It indicated that the solid lubricant took effect in antifriction and antiwear of 9Cr2Mo steel.

Friction and Wear Behavior of Moglice Polymer Composite through Dry Sliding Ball-on-Flat Reciprocating Test

2015 ◽  
Vol 808 ◽  
pp. 137-142 ◽  
Author(s):  
Virgil Iliuţă ◽  
Minodora Rîpă ◽  
Adriana Preda ◽  
Gabriel Andrei
Keyword(s):  
Dry Friction ◽  
Friction And Wear ◽  
Room Temperature ◽  
Wear Behavior ◽  
Wear Properties ◽  
Molybdenum Disulphide ◽  
Friction And Wear Behavior ◽  
Metal Parts ◽  
Friction And Wear Properties ◽  
Sliding Distance

This paper presents an experimental evaluation of friction and wear properties of a composite material-moglice - made by Diamant Metallplastic GmbH company, from Germany. This material is a polymeric matrix reinforced with particles of cristobalite (αSiO2) and molybdenum disulphide (MoS2). The material is recommended by the manufacturer for repairing metal parts. This material was tribologically tested in dry friction conditions, on a ball on flat configuration, using the reciprocating method, on a CETR UMT-2 tribometer (Bruker Corporation). The counterpart was a steel ball. The tests were performed at room temperature in normal conditions of relative humidity of 40-60% using an average sliding speed of 3.5 mm/s. The tests were carried out at normal loads of 20, 30, 40 and 50N over a sliding distance of 100 m. The wear traces obtained were optically examined with μSCAN laser profilometer (NANOFOCUS).

Investigation of Friction and Wear Behavior of Polyoxymethylene/Poly(Lactic Acid) Blends

2017 ◽  
Vol 728 ◽  
pp. 229-234 ◽  
Author(s):  
Suchalinee Mathurosemontri ◽  
Supaphorn Thumsorn ◽  
Satoshi Nagai ◽  
Hiroyuki Hamada
Keyword(s):  
Lactic Acid ◽  
Friction Coefficient ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Melting Behavior ◽  
Poly Lactic Acid ◽  
Wear Properties ◽  
Friction And Wear Behavior ◽  
Aisi 1045 ◽  
Worn Surface

Friction and wear behavior of Polyoxymethylene/Poly (lactic acid) blends (POM/PLA) was investigated to study effect of PLA content on friction and wear properties. The sliding experiments were carried out by Frictoron EFM-III machine. POM blends sliding against the carbon steel (AISI 1045) counterpart under 200 N of pressure load, 100 mm/s of sliding speed for 60 minutes. The wear weigh loss was measured after wear experiment. Wear profile and worn surface were observed by SEM. It was found that friction coefficient of neat POM is lower than neat PLA. However, the incorporation of PLA into POM led to an increment of friction coefficient of POM blends both of 40% and 60% PLA content that over than neat POM and PLA. While wear weigh loss resulted the increasing with increasing of PLA content, which were supported by wear prolife photographs. The deformation of neat PLA and blends on worn surface originated from adhesive due to the thermal softening and melting behavior, while neat POM reveals the plough action behavior.

Friction and Wear of Typical Tool Material at Elevated Temperature

2011 ◽  
Vol 199-200 ◽  
pp. 646-650 ◽  
Author(s):  
Hui Zhang ◽  
Jian Xin Deng ◽  
Ze Wu ◽  
Xing Ai ◽  
Jun Zhao
Keyword(s):  
Friction Coefficient ◽  
Friction And Wear ◽  
Cutting Tool ◽  
Wear Behavior ◽  
Tool Material ◽  
Cemented Carbide ◽  
Friction And Wear Behavior ◽  
Tool Materials ◽  
Worn Surface ◽  
Cutting Tool Materials

The friction and wear behavior of cutting tool materials keeps an issue. In this study, an high temperature tribometre (UMT-2) was used to investigated the tribology properties and mechanism of two kinds of typical cutting tool materials. Commonly used cemented carbide (ZU5) and ceramic (AT) were chosen. The characteristics as to wear rate, friction coefficient and worn surface were studied. From the results, we found that the ceramic had better wear resistance than the cemented carbide. The friction coefficient of cemented carbide decreased with the increase of ambient temperature while the ceramic exhibited an inverse tendency. Finally, the probable wear mechanism was discussed.

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