scholarly journals Assessing the capability of CNTs in improving the properties of Engine Oil

2021 ◽  
Vol 23 (07) ◽  
pp. 1321-1327
Author(s):  
Nousheen Hamid ◽  
◽  
Abhishek Thakur ◽  
Keyword(s):  
Friction And Wear ◽  
Multiwall Carbon Nanotubes ◽  
Friction Reduction ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Wear And Friction ◽  
Previous Decade ◽  
Carbon Nano Tubes ◽  
Swcnts And Mwcnts ◽  
Multiwall Carbon

It is the friction and wear that are the most important variables when it comes to working machines that are more sophisticated. There is only one way to significantly minimize wear and friction, and that is to use lubricating oil, which also helps to preserve the materials from wear. Carbon nano-tubes have become more popular over the previous decade because to the multiple uses they have in many industries owing to their exceptional chemical, electrical, thermal, mechanical, and optical capabilities. This research will analyze the tribological properties of carbon nano-tubes (CNTs) in the presence of a tribotester with four balls. Also, the tribological characteristics of SWCNTs and MWCNTs were assessed for use as an additive in SAE10W40 motor oil. In addition to the performance increase that multiwall carbon nanotubes give in the areas of anti-wear and friction reduction, this experimental finding also points to an increase in performance for lubricating oils containing multi-wall carbon nano-tubes over single-walled carbon nano-tubes.

scholarly journals Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 732
Author(s):  
Yeoh Jun Jie Jason ◽  
Heoy Geok How ◽  
Yew Heng Teoh ◽  
Farooq Sher ◽  
Hun Guan Chuah ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Graphene Nanoplatelets ◽  
Friction Reduction ◽  
Engine Oil ◽  
Protective Film ◽  
Tribological Behaviour ◽  
Wear Reduction ◽  
Pongamia Oil ◽  
Interacting Surfaces ◽  
Worn Surface

This study investigated the tribological behaviour of Pongamia oil (PO) and 15W–40 mineral engine oil (MO) with and without the addition of graphene nanoplatelets (GNPs). The friction and wear characteristics were evaluated in four-ball anti-wear tests according to the ASTM D4172 standard. The morphology of worn surfaces and the lubrication mechanism of GNPs were investigated via SEM and EDS. This study also focuses on the tribological effect of GNP concentration at various concentrations. The addition of 0.05 wt % GNPs in PO and MO exhibits the lowest friction and wear with 17.5% and 12.24% friction reduction, respectively, and 11.96% and 5.14% wear reduction, respectively. Through SEM and EDS surface analysis, the surface enhancement on the worn surface by the polishing effect of GNPs was confirmed. The deposition of GNPs on the friction surface and the formation of a protective film prevent the interacting surfaces from rubbing, resulting in friction and wear reduction.

Influence of MoS2, H3BO3, and MWCNT Additives on the Dry and Lubricated Sliding Tribology of AMMC–Steel Contacts

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Harpreet Singh ◽  
ParamPreet Singh ◽  
Hiralal Bhowmick
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Preliminary Investigation ◽  
Multiwall Carbon Nanotubes ◽  
Operating Conditions ◽  
Matrix Composites ◽  
Base Oil ◽  
Oil Additives ◽  
Multiwall Carbon

The present study is focused on the performance evaluation of MoS2, H3BO3, and multiwall carbon nanotubes (MWCNT) used as the potential oil additives in base oil for aluminum metal matrix composites (AMMC)–steel (EN31) tribocontact. Al–B4C composite is used for this purpose; based on a set of preliminary investigation under unlubricated and fresh oil lubrication, three different types of AMMCs (Al–SiC, Al–B4C, and Al–SiC–B4C) were used. A pin-on-disk tribometer is used for all the friction and wear tests under operating condition of load 9.8 N and sliding velocity of 0.5 m/s. From the particle-based wet tribology, it is clear that both the additives H3BO3 and MWCNT improve the friction as well as wear behavior for selected composite contacts. Multiwall carbon nanotubes emerged out as superior among all the additives, whereas MoS2 additives show marginal enhancement in frictional performance under given operating conditions. Fractography and morphological study of pin specimens are carried out to identify the underlying friction and wear mechanisms.

Research on Ultrafine PTFE Particles with Grease Tribological Properties

2011 ◽  
Vol 194-196 ◽  
pp. 454-457
Author(s):  
Zhen Jiang Ma ◽  
Ji Hui Yin ◽  
Yang Jiang
Keyword(s):  
Friction And Wear ◽  
Friction Reduction ◽  
Frictional Surface ◽  
Wear Properties ◽  
Lubricating Grease ◽  
Particle Layer ◽  
Wear And Friction ◽  
Friction And Wear Properties ◽  
Steel Balls ◽  
Worn Surface

This article presents a research on friction and wear properties of titanium composite lubricating grease containing ultrafine PTFE particles by using scanning electron microscopy to observe surface morphology of the worn steel balls and EDS to analysis the main elements in the worn surface of steel ball. The results show that the compound titanium grease with 3% ultrafine PTFE has the best wear and friction reduction properties. Its friction coefficient decrease about 25.5%, the diameter of wear scar decrease about 23.2%. The appropriate amount of PTFE particles go into the frictional surface with the grease, form the PTFE particle layer on the frictional surface, which reduces the direct contact of metal to metal, effectively reduces the friction and wear.

Applied Study on Mechanics of Nanocomposites with Carbon Nanofillers

2013 ◽  
Vol 43 (3) ◽  
pp. 67-76 ◽  
Author(s):  
I. Petrova ◽  
E. Ivanov ◽  
R. Kotsilkova ◽  
Y. Tsekov ◽  
V. Angelov
Keyword(s):  
Friction And Wear ◽  
Polyester Resin ◽  
Multiwall Carbon Nanotubes ◽  
Scratch Resistance ◽  
Wear Properties ◽  
Nucleation Effect ◽  
Applied Study ◽  
The Coefficient Of Friction ◽  
Carbon Nanofillers ◽  
Multiwall Carbon

Abstract The incorporation of small amount of hard and soft carbon nanofillers, such as nanoscale diamond, carbon ash and multiwall carbon nanotubes (MWCNT) have different effect on the surface properties of the neat polyester resin and polypropylene. The soft nanofiller, carbon ash did not influence the wear properties of the polyester resin up to 5 wt% filler content. In contrast, 0.5-5 wt% hard nanodiamond strongly decreased the wear mass loss of the polyester resin. The scratch resistance and the coefficient of friction of the polypropylene is improved significantly while there is 0.1-3 wt% MWCNT. Small amount of MWCNTs change significantly the molecular structure of the polypropylene, producing a nucleation effect. This was found to assist in the changes of surface prop- erties by increasing the hardness, friction and wear of polypropylene.

Tribological Properties of New Developed Nano Boric Acid Suspended as Additive in Engine Oil

2019 ◽  
Vol 823 ◽  
pp. 41-52
Author(s):  
Hakan Kaleli̇ ◽  
Selman Demi̇rtaş ◽  
Veli Uysal ◽  
Zulhicce Tanriseven
Keyword(s):  
Boric Acid ◽  
Photoelectron Spectroscopy ◽  
Friction And Wear ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Chemical Compositions ◽  
X Ray ◽  
Liner System

It is well known that nanoparticles affect the interaction between lubricants and surfaces with various chemical compositions and different chemical and physical properties. In recent years, nanoparticles have started to play more important roles as lubricant additives for their potential in wear, friction and emission reduction and improving lubrication and fuel economy. Although nanolubricants are frequently used for friction tests, little is known about stability and degree of dispersion of these nanoparticles in viscous liquids. Most of them are unstable, agglomerate or aggregate which sediment over time. Boric acid (H3BO3) has always been a very important material due to its broad range of applications such as in medicine, cosmetics, automotive industry, metallurgy and also for miscellaneous purposes in other areas. Literature survey showed that friction between automobile engine parts could be greatly reduced using microscopic particles of boric acid.This study involves the new invention of successful suspension of nano boric acid (BA) additive added into 5W-40 fully synthetic commercial lubricating oil. This invention is confidential and realized by Murat ÖZAYMAN from Tribor ARGE Co. in Teknopark of YILDIZ Technical University in Istanbul-TURKEY. The particle size of BA is determined with (Transmission Electron Microscopy) (TEM). Backscattering and transmittance profiles proved that nano boric acid (BA) particles were in suspension in commercial engine oil. Suspended BA in engine oil is applied between piston ring and cylinder liner system in order to investigate their effect on friction and wear under boundary lubricated conditions. Simulation and measurement of friction and wear were conducted using a reciprocating tribometer. Surface analysis were performed using 3D digital optical microscope, Field Emission Scanning Electron Microscope (FESEM)/X-Ray, X-ray photoelectron spectroscopy (XPS) and Atomic Force Microscopy (AFM). Boron (B) from BA is well detected, mixed with other elements of additives and protected the surface under boundary lubrication conditions. The results indicate that BA can considerably improve the tribological performance of a piston ring and cylinder liner system under lubricated conditions. It has found that the friction coefficient is reduced with nano boric acid (BA) suspended engine oil and protected the surface mostly on cylinder liner mixing with other additives.

scholarly journals Examining the role of hexagonal boron nitride nanoparticles as an additive in the lubricating oil and studying its application

2020 ◽  
Vol 234 (1-2) ◽  
pp. 19-36
Author(s):  
Sangharatna Ramteke ◽  
H Chelladurai
Keyword(s):  
Boron Nitride ◽  
Friction And Wear ◽  
Hexagonal Boron Nitride ◽  
Mechanical Systems ◽  
Friction Reduction ◽  
Lubricating Oil ◽  
Tribological Characteristics ◽  
Gravimetric Analysis ◽  
Reduction Behavior

Lubricating oil plays an important role in minimizing the friction and wear of many mechanical systems. The additives present in the conventional lubricant are inadequate to reduce the friction and wear of today’s mechanical systems. However, the use of these additives has a significant effect on the environment due to their fast chemical degradation. In recent years, nanoparticle-based lubricant has attracted great attention due to their friction reduction behavior. Therefore, it is of great importance to examine the role of nanoparticle addition in the conventional lubricant and its influence on the tribological characteristics of the mechanical systems. Hence, this research work focused on the formulation of hexagonal boron nitride nanoparticle-based nanofluids and its effect on the tribological characteristics of cylinder liner and piston rings of a realistic diesel engine. The different concentrations of hBN nanoparticle-based nanofluids were formulated and characterized using the ultraviolet–visible spectroscopy and the thermal gravimetric analysis. The results of the experimental analysis showed that hBN nanoparticles as an additive in the lubricating oil exhibited better anti-wear and friction reduction behavior than the conventional base oil 20W40.

Application of Suspended Nanoboric Acid as an Efficient Lubrication Additive in Engine Oil

2019 ◽  
Vol 823 ◽  
pp. 53-60
Author(s):  
Hakan Kaleli̇ ◽  
Selman Demi̇rtaş ◽  
Veli Uysal ◽  
Zulhicce Tanriseven ◽  
Jun Zhao
Keyword(s):  
Friction And Wear ◽  
Optical Microscope ◽  
Vital Role ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Disk System ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
And Performance

Lubricants play a vital role in machine life and performance, reducing friction and wear and preventing component failure. Performance-enhancing additives are a vital part of today’s modern lubricants. In response to this need, this experimental work presents the development of the new suspended nanoboric acid (nBA) additive added in engine oil that can drastically lowered friction and wear.This is a new invention of nBA additive hold in suspension and added into 5W-40 fully synthetic commercial lubricating oil. This invention is confidential and realized by Tribor ARGE Co. in Teknopark of YILDIZ Technical University in Istanbul-TURKEY.The particle size of nBA is determined with (Transmission Electron Microscopy) (TEM). Turbiscan Tower Stability Analyzer results proved that nBA particles were in suspension in commercial engine oil. Suspended nBA in engine oil is applied between ball and disk system in order to investigate their effect on friction and wear under lubricated conditions. Simulation and measurement of friction and wear were conducted using a ball on disk reciprocating tribometer UMT-3. Surface analysis was performed using 3D digital optical microscope and surface roughness, Field Emission Scanning Electron Microscope (FESEM)/X-Ray and Atomic Force Microscopy (AFM). Boron (B) from nBA is well detected, mixed with other elements of additives and protected the surface under boundary lubrication conditions. The results indicate that nBA can considerably improve the tribological performance of a ball and disk pairs under lubricated conditions. It has found that the friction coefficient is reduced with nBA suspended engine oil and protected the surface on both ball and disk mixing with other additives.

scholarly journals Development of a nanodiamond-based lubricant for a versatile use in the beverage industry conveyor systems

2017 ◽  
Vol 69 (5) ◽  
pp. 723-729
Author(s):  
Carmen Torres-Sanchez ◽  
Nikolaos Balodimos
Keyword(s):  
Friction And Wear ◽  
Positive Impact ◽  
High Load ◽  
Friction Reduction ◽  
Lubricating Oil ◽  
Operating Life ◽  
Load Range ◽  
Content Type ◽  
Pet Bottles ◽  
Low Load

Purpose The purpose of this paper is to propose a nanodiamond-particle-loaded food-grade lubricating oil, a nanolubricant, that can be used over a broad range of loads in factories (low load applications like conveyor systems and high load applications like heavy machinery). Design/methodology/approach Tribological performance of the nanolubricant was studied at both load levels. A typical factory-sized conveyor belt used for beverage packaging (aluminium cans, glass and PET bottles) was employed for the low load range. Coefficients of friction and wear scars were measured and the lubricating performance was quantified. A four-ball tester was used to characterise the performance of the nanolubricant as per ASTM D2783/D4172. A comparison between the nanolubricant and baseline oils was carried out. Findings Results show an overall decrease in the coefficients of friction and wear scars for all packages at low pressures when the nanolubricant is used. They also show a better friction-reduction performance in the high load regimes. The results indicate that the nanolubricant is versatile in both ranges of loading. Practical implications The current protocols for lubrication in the food and drink factories involve the use of water-based detergents for the conveyor lines and industry-grade oils for the machinery. The use of a single and versatile lubricant for both ranges of loads may have a positive impact on the sustainability and environmental performance of the sector. Originality/value Beverage processing and packing factories need their mechanised conveyor systems suitably lubricated to avoid excessive friction between the containers and the load-bearing surface of the conveyors (e.g. belts or chains). Other areas of the conveying systems, such as motors, gears, rollers and bearings, also need suitable lubrication to prevent failure and lengthen their operating life. There is a myriad of lubricants and lubricating solutions for each of these areas independently, but there is no commercial lubricating fluid that could be used on both successfully.

Tribological performance of nanolubricants dispersed with graphene oxide and detonation nanodiamond

2020 ◽  
pp. 135065012097734
Author(s):  
Abdulhakeem Javeed ◽  
Bibin John
Keyword(s):  
Graphene Oxide ◽  
Coefficient Of Friction ◽  
Surface Texture ◽  
Friction And Wear ◽  
Wear Track ◽  
Friction Reduction ◽  
Engine Oil ◽  
Test Duration ◽  
Detonation Nanodiamond ◽  
Base Oil

Different compositions of graphene oxide (GO) and detonation nanodiamond (DND) nanoparticles with API CH-4 engine oil were tested on a reciprocating wear tester at high contact pressure. Significant reductions in friction and wear were observed. Wear surfaces were characterized by a 3D profiler, scanning electron microscopy and energy-dispersive X-ray spectroscopy to determine the surface topography, film build-up composition, mechanism of nanoadditive-assisted friction reduction and wear reduction characteristics. The wear tests indicated that the original engine liner segments containing surface texture with oil retention potential significantly lose their micropeaks and valleys during the test. Even though the surface texture got disturbed, the presence of nanoadditives in the lubricant led to a reduction in the coefficient of friction. Considerable reduction in the roughness level of the wear track associated with the use of a nanolubricant was also explored through the 3D profiler analysis. The surface roughness of the wear track produced while using a nanolubricant with 0.5 mg/l of detonation nanodiamond nanoparticles was 66% lower than the roughness of the wear track obtained with the base oil. The nanolubricant suspended with 1 mg/l detonation nanodiamond nanoparticles achieved a lower coefficient of friction earlier and a combination of detonation nanodiamond and GO at 0.5 mg/l concentration achieved the lowest coefficient of friction and wear at the end of the test duration.

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