The W-cluster reactive sites interaction model for WDLC coatings with ionic liquids

Arshad, Muhammad Shahid (avtor), Čoga, Lucija (avtor), Geue, Thomas M. (avtor), Kovač, Janez (avtor), Cruz, Sandra M.A. (avtor), Kalin, Mitjan (avtor)

This study investigates the use of 1,3-dimethylimidazolium dimethylphosphate ionic liquid (IL) additive in glycerol base oil for improving the lubrication-properties of tungsten-doped diamond-like carbon (WDLC) coatings. Tribological tests were conducted at various applied loads (5 N, 10 N, 20 N) and elevated temperature (100 °C), and the addition of 1 wt% of IL resulted in a significant reduction (∼50%) in friction-coefficient. In-situ neutron-reflectometry analysis revealed a multi-step tribofilm formation mechanism involving IL and W-clusters, resulting in the formation of a 1.24-nm thick tribofilm on the WDLC surface within the first 30-minutes of the friction experiment. The reaction kinetics for tribofilm formation are discussed involving dissociation of dimethylphosphate into dioxo-phosphate, which interacts with W-clusters to form tungsten phosphates and cations adsorbed on their surface.

• Jezik: Angleški jezik
• Ključne besede: W-doping DLC coatings, ionic-liquid, friction, neutron reflectometry
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: 11 str.
• Številčenje: Vol. 185, art. 108550
• PID: 20.500.12556/RUL-145655
• UDK: 539.92
• ISSN pri članku: 0301-679X
• DOI: 10.1016/j.triboint.2023.108550
• COBISS.SI-ID: 150840579
• Datum objave v RUL: 04.05.2023

Gradivo je del revije

• Naslov: Tribology international
• Skrajšan naslov: Tribol. int.
• Založnik: Butterworth Scientific
• ISSN: 0301-679X
• COBISS.SI-ID: 26558976

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: W-doping DLC premazi, ionska tekočina, trenje, nevtronska reflektometrija