20.500.12556/RUL-145655 The W-cluster reactive sites interaction model for WDLC coatings with ionic liquids 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. W-doping DLC coatings ionic-liquid friction neutron reflectometry W-doping DLC premazi ionska tekočina trenje nevtronska reflektometrija true false true Angleški jezik Slovenski jezik Članek v reviji 2023-05-04 09:33:49 2023-05-04 09:33:53 2023-10-25 03:56:34 0000-00-00 00:00:00 2023 0 0 11 str. Vol. 185, art. 108550 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.92 0301-679X 10.1016/j.triboint.2023.108550 150840579 Shahid_Arshad_..._The_W-cluster_reactive_sites_interaction_model_for_WDLC_coatings_with_ionic_liquids.pdf Shahid_Arshad_..._The_W-cluster_reactive_sites_interaction_model_for_WDLC_coatings_with_ionic_liquids.pdf 1 E8AA8E756BF9650413E8D9CC08215501 b1f2093a1461d30abf8a11c525bb3ba271734bbdaf4f643c9b5d18b781d706a9 9b60bcce-ea4e-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168613 https://www.sciencedirect.com/science/article/pii/S0301679X23003377 1 ce8e7282-ea4d-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168612 Fakulteta za strojništvo 0 0 0