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New strategy for reducing the EHL friction in steel contacts using additive-formed oleophobic boundary films
ID Kalin, Mitjan (Avtor), ID Kus, Maja (Avtor)

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Izvleček
In this study we present a mechanism for the elastohydrodynamic (EHD) friction reduction in steel/steel contacts, which occurs due to the formation of oleophobic surface boundary layers from common boundary-lubrication additives. Several simple organic additives (amine, alcohol, amide, and fatty acid) with different molecular structures were employed as the model additives. It was found that the stronger chemisorption at 100 °C, rather than the physisorption at 25 °C, is more effective in friction reduction, which reaches 22%. What is more, EHD friction reduction was obtained in steel/steel contacts without use of the diamond-like carbon (DLC) coatings with their wetting or thermal effect, which was previously suggested as possible EHD friction reduction mechanism; yet about the same friction reduction of about 20% was obtained here-but with much simpler and less expensive technology, namely with the adsorbed oleophobic surface layers. A small variation in the additive's molecular structure results in significant changes to the friction, indicating good potential in future EHD lubrication technology, where these additives could be designed and well optimised for notable reduction of the friction losses in the EHD regime.

Jezik:Angleški jezik
Ključne besede:elastohydrodynamic lubrication, friction, additives, oleophobic layer, boundary slip
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Status publikacije:Objavljeno
Različica publikacije:Objavljena publikacija
Datum objave:15.05.2020
Leto izida:2021
Št. strani:Str. 1346-1360
Številčenje:Vol. 9, iss. 6
PID:20.500.12556/RUL-139398 Povezava se odpre v novem oknu
UDK:539.92
ISSN pri članku:2223-7690
DOI:10.1007/s40544-020-0403-2 Povezava se odpre v novem oknu
COBISS.SI-ID:30376451 Povezava se odpre v novem oknu
Datum objave v RUL:02.09.2022
Število ogledov:561
Število prenosov:74
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Gradivo je del revije

Naslov:Friction
Skrajšan naslov:Frict.
Založnik:Tsinghua University Press
ISSN:2223-7690
COBISS.SI-ID:525351449 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:15.05.2020

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:elastohidrodinamično mazanje, trenje, aditivi, oleofobna plast, mejni zdrs

Projekti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0231
Naslov:Tribologija

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