The impact of tribology on energy use and CO2 emission globally and in combustion engine and electric cars

Holmberg, Kenneth; Erdemir, Ali

doi:10.1016/j.triboint.2019.03.024

Cited by 443 publications

(219 citation statements)

References 43 publications

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“…The displacement step in SD at the lower DTL visible in Fig. 1 and labeled as feature (2) in Fig. 3b may be interpreted as a special case of feature (1).…”

Section: Discussionmentioning

confidence: 96%

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Early deformation mechanisms in the shear affected region underneath a copper sliding contact

et al. 2020

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Dislocation mediated plastic deformation decisively influences the friction coefficient and the microstructural changes at many metal sliding interfaces during tribological loading. This work explores the initiation of a tribologically induced microstructure in the vicinity of a copper twin boundary. Two distinct horizontal dislocation traces lines (DTL) are observed in their interaction with the twin boundary beneath the sliding interface. DTL formation seems unaffected by the presence of the twin boundary but the twin boundary acts as an indicator of the occurring deformation mechanisms. Three concurrent elementary processes can be identified: simple shear of the subsurface area in sliding direction, localized shear at the primary DTL and crystal rotation in the layers above and between the DTLs around axes parallel to the transverse direction. Crystal orientation analysis demonstrates a strong compatibility of these proposed processes. Quantitatively separating these different deformation mechanisms is crucial for future predictive modeling of tribological contacts.

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“…The displacement step in SD at the lower DTL visible in Fig. 1 and labeled as feature (2) in Fig. 3b may be interpreted as a special case of feature (1).…”

Section: Discussionmentioning

confidence: 96%

“…Recent studies affirm the substantial impact friction and wear have on global energy consumption, e.g. in the transportation sector 2 . This corroborates the importance of basic and applied research in the field of materials tribology.…”

mentioning

confidence: 94%

Early deformation mechanisms in the shear affected region underneath a copper sliding contact

et al. 2020

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“…Ethers derived from biomass also have the potential to replace petroleum‐derived automotive lubricants . Transportation vehicles consume almost 30 % of energy produced today, and of that approximately one third is lost due to friction and wear . This gives rise to a global demand for lubricants of around 35 million tonnes per year, with automotive lubricants accounting for about 15 % of the total lubricant consumption .…”

Section: Applications and Fuel And Lubricant Properties Of Biomass‐dementioning

confidence: 99%

“…[16,50,51] Transportation vehicles consume almost3 0% of energy produced today,a nd of that approximately one thirdi sl ost duet of riction and wear. [52,53] This gives rise to ag lobald emand forl ubricants of around35million tonnes per year,with automotive lubricants accounting for about 15 %o ft he total lubricant consumption. [54] The performance of automotive lubricants is judged by an umber of criteria, including the kinematic viscosity (KV) at 40 and 100 8C( KV 40 and KV 100 ,r espectively), the viscosity index (VI), the pour point (PP), the oxidation stability (DSC onset temperature),t he volatility (TGA Noack), and the cold-cranking simulator viscosity (CCS).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Biomass‐Derived Ethers for Use as Fuels and Lubricants

2019

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“…In all these sectors, mechanical systems suffer energy losses, mostly due to friction and wear, and therefore their reduction is decisive. Thus, in economic terms the annual total losses originating from tribological contacts are estimated to be 2,536,000 million euros, being 73% due to friction and 27% due to wear [2]. Friction and wear losses can be reduced substantially by using new tribological solutions.…”

Section: Introductionmentioning

confidence: 99%

Tribological Behavior of Nanolubricants Based on Coated Magnetic Nanoparticles and Trimethylolpropane Trioleate Base Oil

et al. 2020

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The main task of this work is to study the tribological performance of nanolubricants formed by trimethylolpropane trioleate (TMPTO) base oil with magnetic nanoparticles coated with oleic acid: Fe3O4 of two sizes 6.3 nm and 10 nm, and Nd alloy compound of 19 nm. Coated nanoparticles (NPs) were synthesized via chemical co-precipitation or thermal decomposition by adsorption with oleic acid in the same step. Three nanodispersions of TMPTO of 0.015 wt% of each NP were prepared, which were stable for at least 11 months. Two different types of tribological tests were carried out: pure sliding conditions and rolling conditions (5% slide to roll ratio). With the aim of analyzing the wear by means of the wear scar diameter (WSD), the wear track depth and the volume of the wear track produced after the first type of the tribological tests, a 3D optical profiler was used. The best tribological performance was found for the Nd alloy compound nanodispersion, with reductions of 29% and 67% in friction and WSD, respectively, in comparison with TMPTO. On the other hand, rolling conditions tests were utilized to study friction and film thickness of nanolubricants, determining that Fe3O4 (6.3 nm) nanolubricant reduces friction in comparison to TMPTO.

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The impact of tribology on energy use and CO2 emission globally and in combustion engine and electric cars

Cited by 443 publications

References 43 publications

Early deformation mechanisms in the shear affected region underneath a copper sliding contact

Early deformation mechanisms in the shear affected region underneath a copper sliding contact

Synthesis of Biomass‐Derived Ethers for Use as Fuels and Lubricants

Tribological Behavior of Nanolubricants Based on Coated Magnetic Nanoparticles and Trimethylolpropane Trioleate Base Oil

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