Graphene - MoS2 ensembles to reduce friction and wear in DLC-Steel contacts

Mutyala, Kalyan C.; Wu, Yimin A.; Erdemir, Ali; Sumant, Anirudha V.

doi:10.1016/j.carbon.2019.02.047

Cited by 126 publications

(44 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Before the assessment of solid lubricant performance, base-line metrics of wear and friction values were established with 440C over 440C tribopair. The steel on steel friction at 1 N load and sliding at 0.1 m/s was 0.85 ± 0.1 and is in agreement with the previous reports 31 , 32 . Following baseline experiments, the ability of the solid lubricant to reduce friction and wear was measured over a broad range of contact pressures and sliding speeds, and the summary of the frictograms is presented in Fig.…”

Section: Resultssupporting

confidence: 93%

Towards developing robust solid lubricant operable in multifarious environments

Ayyagari

Mutyala

Sumant

2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

Conventional solid lubricants such as MoS2, graphite, or diamond-like carbon films demonstrate excellent tribological performance but only in specific environments due to their inherent materials properties. This limitation prohibits using these solid lubricants in environments that change dynamically. This study presents the results of a novel solid lubricant that was developed using a combination of solution-processed 2D-molybdenum disulfide and graphene-oxide (GO) that can be deposited on to stainless steel substrates using a simple spray-coating technique and show exceptional performance in multifarious environments namely, ambient (humid) atmosphere, dry nitrogen, and vacuum. The tribological performance of the coatings was evaluated using a ball-on-disc sliding test and demonstrated an excellent wear/friction performance in all environments and coating survived even after 44 km of linear sliding. Transmission electron microscopy and Raman spectroscopy analysis of the tribolayers suggested in-operando friction-induced re-orientation of MoS2 layers that were protected by GO layers and, an absence of MoOx peaks indicate a strong resistance to intercalation with moisture and oxygen. The simplicity and robustness of the hybrid MoS2–GO solid lubricant in mitigating wear-friction behavior of steel-on-steel tribopair in a multifarious environment is a game-changing and is promising for various applications.

show abstract

Section: Resultssupporting

confidence: 93%

Towards developing robust solid lubricant operable in multifarious environments

Ayyagari

Mutyala

Sumant

2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…[11][12][13][14][15][16][17][18][19] 2D materials such as graphene and molybdenum disulfide are known for their excellent mechanical, electrical and tribological properties. [20,21] However, translating such unique properties of the 2D materials to achieve sustained superlubricity at macroscale is rather challenging [8][9][10] and there is on-going research to achieve macroscale superlubricity that will be long lasting, will work irrespective of environmental conditions, surface roughness, and at higher contact pressures and higher sliding speed without periodic replenishment of the lubricant materials.…”

Section: Introductionmentioning

confidence: 99%

Iron‐Nanoparticle Driven Tribochemistry Leading to Superlubric Sliding Interfaces

Berman

Mutyala

Srinivasan

et al. 2019

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

nanostructures (OLCs). Combining with atomistic molecular dynamic (MD) simulations, we elucidate the tribochemical mechanism of formation of OLC with pure iron NPs and how that depends sensitively on the core-shell chemistry of the nanoparticle. Interestingly, the formed OLCs lead to the near-zero friction (superlubricity) during sliding in dry conditions, thus demonstrating great potential to be used as a solid lubricant for various tribological applications.

show abstract

“…Due to its lamellar shape made of individual atomically thin planes that can easily slide against each other [ 36 ], molybdenum disulphide (MoS 2 ) has been successfully used as a solid lubricant. MoS 2 can work, alone or with other additives, in different environments, such as: polymeric composites based on PEEK [ 37 , 38 ], ABS [ 39 ], PI [ 40 ] and PA [ 19 , 41 , 42 , 43 , 44 ]; liquid lubricants [ 45 , 46 , 47 ] or coatings [ 48 , 49 , 50 ], showing promising results in terms of improving friction coefficient and wear rate.…”

Section: Introductionmentioning

confidence: 99%

Tribological Performance of Nylon Composites with Nanoadditives for Self-Lubrication Purposes

Clavería

Gimeno²,

Miguel³

et al. 2020

Polymers

View full text Add to dashboard Cite

A systematic study comparing the wear behaviour of composites with nylon matrix (PA66, PA46, PA12) and different nanoadditives and reinforcing additives (graphite, graphene, MoS2 and ZrO2) has been carried out in order to achieve a proper self-lubricant material for bearing cages. The wear characterisation was done using pin-on-disc tests, SEM and EDX analysis. The results show that better outcomes are obtained for composites based on PA12. The addition of ZrO2 offers negative values of wear due to the metallic particle transference from the counterface to the polymeric pin.

show abstract

Graphene - MoS2 ensembles to reduce friction and wear in DLC-Steel contacts

Cited by 126 publications

References 28 publications

Towards developing robust solid lubricant operable in multifarious environments

Towards developing robust solid lubricant operable in multifarious environments

Iron‐Nanoparticle Driven Tribochemistry Leading to Superlubric Sliding Interfaces

Tribological Performance of Nylon Composites with Nanoadditives for Self-Lubrication Purposes

Contact Info

Product

Resources

About