Review of tribological properties of nanoparticle-based lubricants and their hybrids and composites

Htwe, Ye Zar Ni; Al-Janabi, Aws. S.; Wadzer, Yasmin; Mamat, Hussin

doi:10.1007/s40544-023-0774-2

Cited by 7 publications

(5 citation statements)

References 126 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For a QCM electrode with 5 MHz fundamental resonant frequency, the electrode thickness t is 0.0334 cm and a typical active electrode radius (i.e., the section between the two electrodes) is 0.32 cm. The effective mass M of the active oscillation region ~ (ρqπr 2 t)/2 yields M = 0.0142 g; K = 1.4 × 10 13 dyn/cm; A= 0.32 cm 2 , where K = (2πf) 2 M, and m = 1.263 mg for the 50 mm sphere having the bulk density of gold, 19.3 g/cm 3 .…”

Section: A Sensitive New Methods For the Determination Of Adhesive Bo...mentioning

confidence: 99%

“…Although C60 did not subsequently become established as a commercial lubricant additive, the opportunities to reduce macroscale friction by using nanoparticle (NP) additives have sparked an intense interest among researchers and industry [2][3][4]. Most of the literature reports published to this date find that NP additives reduce friction, but their effectiveness as friction modifiers varies widely.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fundamental Mechanisms Underlying the Effectiveness of Nanoparticle Additives to Lubricants: 25 Examples Linking Nano- to Macroscale Friction

Krim,

Smirnov

2024

Preprint

View full text Add to dashboard Cite

Studies of the fundamental origins of friction have undergone a rapid acceleration in recent years by providing valuable information on the nanoscale mechanisms responsible for the friction at the macroscopic level. Significant efforts have been directed into developing composite nanofluids and nanoparticle additives to unlock new tribological properties unattainable by traditional lub-ricants. The studies are now further evolving by developing methods to achieve active control of the nano- and/or mesoscale friction by application of magnetic and electric fields external to the contact. These methods constitute an area of rapidly growing interest, and they also are illumi-nating how the performance of conventional lubricants could be enhanced through synergistic addition of nanoparticles (NPs). This mini-review highlights 25 publications that collectively re-veal significant progress, as well as important outstanding challenges, to a fundamental under-standing of how the addition of NPs impacts the lubricant performance. The first two sections focus on the use of Quartz Crystal Microbalance (QCM), a technique that spans atomic to mac-roscale length and time scales. Subsequent sections expand to complimentary methods comparing results at the macro and atomic scale for similar materials. These studies highlight the pivotal role of the nanoparticle charge and surface treatment, while also indicating that rolling of nano-particles is ineffective and/or detrimental.

show abstract

Section: A Sensitive New Methods For the Determination Of Adhesive Bo...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fundamental Mechanisms Underlying the Effectiveness of Nanoparticle Additives to Lubricants: 25 Examples Linking Nano- to Macroscale Friction

Krim,

Smirnov

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Although C 60 did not subsequently become established as a commercial lubricant additive, the opportunities to reduce macroscale friction using nanoscale additives have sparked intense interest among researchers and industry [2][3][4]. This interest is driven by the importance of tribology and energy efficiency to the burgeoning financial and environmental costs of global energy consumption [5][6][7][8] and the demand for the replacement of fossil fuel lubricants with environmentally friendly and degradable materials [6,9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Highlights were selected to demonstrate a range of experimental and theoretical research, to provide direct connections between the nanoscale and macroscale tribological attributes, and, when possible, to emphasize environmentally friendly materials such as water-based nanofluids. Given the very limited number of highlights presented here, additional in-depth and extensive topical review articles are also included in the references for follow-up reading and background material [2][3][4]10,14,.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Mechanisms Underlying the Effectiveness of Nanoparticle Additives to Lubricants: 25 Examples Linking Nano- to Macroscale Friction

Krim,

Smirnov

2024

Lubricants

View full text Add to dashboard Cite

Studies of the fundamental origins of friction have undergone rapid acceleration in recent years by providing valuable information on the nanoscale mechanisms responsible for friction at the macroscopic level. Significant efforts have been directed at developing composite nanofluids and nanoparticle additives to unlock new tribological properties unattainable by traditional lubricants. The studies are now further evolving by developing methods to achieve active control over nano- and/or mesoscale friction through the application of magnetic and electric fields external to the contact. These methods constitute an area of rapidly growing interest, and they also illuminate how the performance of conventional lubricants could be enhanced through the synergistic addition of nanoparticles (NPs). This mini review highlights 25 publications that collectively reveal significant progress, as well as important outstanding challenges, to the fundamental understanding of how the addition of NPs impacts lubricant performance. The first two topics focus on how Quartz Crystal Microbalance (QCM) nanotribological response to solid contacts can be linked to macroscale friction coefficients in the boundary lubrication regime and how QCM response upon immersion into a liquid is linked to macroscale lubricity in the mixed and hydrodynamic regimes. The third and fourth topics highlight the pivotal role of nanoparticle charge and surface treatments, while also indicating that the rolling of nanoparticles is ineffective and/or detrimental. The fifth topic focuses on applications that demonstrate the tuning of friction by varying nanoparticle electric charge and/or an external electric potential. The highlighted literature was selected to demonstrate a range of experimental and theoretical research, to provide direct connections between the nanoscale and macroscale tribological attributes, and to emphasize environmentally friendly lubricating materials such as water-based nanofluids.

show abstract

“…Nanoparticles and lubricants laden with them (i.e. nano-lubricants) have received a great deal of attention due to their unique properties from a wide variety of materials and applications [27,28]. Nanolubricants are colloids, or fluids with nano-scale particles suspended in them (See Fig.…”

mentioning

confidence: 99%

The Influence of Various Grease Compositions and Silver Nanoparticle Additives on Electrically Induced Rolling-element Bearing Damage

Bond,

Jackson,

Mills

2023

Preprint

View full text Add to dashboard Cite

Leakage currents accelerate surface degradation of metal contacts via small scale arcing across lubricating films, but recent observations suggest that metallic nanoparticle additives in lubricants may be useful to improve contact performance. These findings prompted a study dealing that examined electrically induced surface pitting of steel contacts in the presence of several lubricating greases including some containing nanometer-sized colloidal Ag particles. Reciprocating rolling sphere-on-disk experiments were conducted under electro-tribological loads employing polyurea greases derived from mineral and synthetic base oils with and without additives. Preparation of greases modified with nanoparticles used only Ag colloids stable in hydrocarbons, which prevented particle aggregation. Friction forces and electrical resistance were monitored continuously during the tests; surface changes were characterized by means of optical spectroscopy, stylus profilometry and scanning electron microscopy (SEM) including compositional analysis using energy dispersive spectroscopy (EDS). The observations demonstrate that surface pitting induced by arcing occurs mainly at the points were the rolling motion changes direction and that eroded metal is deposited along the wear grove. Micron-sized pits are formed which contain carbon and oxygen indicating that arcing causes decomposition of the hydrocarbon lubricants. All the findings indicate a significant inhibition of pitting induced by the nanoparticles; some greases containing other additives exhibit a similar, although less pronounced, effect.

show abstract

Review of tribological properties of nanoparticle-based lubricants and their hybrids and composites

Cited by 7 publications

References 126 publications

Fundamental Mechanisms Underlying the Effectiveness of Nanoparticle Additives to Lubricants: 25 Examples Linking Nano- to Macroscale Friction

Fundamental Mechanisms Underlying the Effectiveness of Nanoparticle Additives to Lubricants: 25 Examples Linking Nano- to Macroscale Friction

Fundamental Mechanisms Underlying the Effectiveness of Nanoparticle Additives to Lubricants: 25 Examples Linking Nano- to Macroscale Friction

The Influence of Various Grease Compositions and Silver Nanoparticle Additives on Electrically Induced Rolling-element Bearing Damage

Contact Info

Product

Resources

About