Autor(es): Omiya, Takeru ; Cavaleiro, Albano ; Figueiredo, Nuno M. ; Gouttebaron, Rachel ; Felten, Alexandre ; Ferreira, Fábio
Data: 2024
Identificador Persistente: https://hdl.handle.net/10316/117006
Origem: Estudo Geral - Universidade de Coimbra
Assunto(s): Gadolinium Diamond-Like Carbon (Gd-DLC); Ionic Liquids; Wear Resistance; Corrosion Resistance
This study examines the integration of ionic liquids (ILs) with gadolinium diamond-like carbon (Gd-DLC) films as a means of addressing the environmental drawbacks associated with conventional additives, such as zinc dialkyldithiophosphates. Tribological testing initially revealed that higher concentrations of gadolinium in the DLC resulted in improved wear resistance. Further observation of the wear tracks confirmed no corrosion typically seen in steel under bromide-containing ILs, thereby demonstrating the protective capabilities of Gd-DLC. Advanced surface analysis techniques revealed that increased gadolinium content enhances phosphate adsorption, resulting in the generation of protective tribofilms. These findings indicate that Gd-DLC and ILs have the potential to develop sustainable and efficient lubrication systems, significantly enhancing both performance and environmental compatibility of mechanical applications.
This research is supported by national funding from FCT – Fundação para a Ciência e a Tecnologia, under projects UIDB/00285/2020 and LA/P/0112/2020, SmartHyLub (2022.05603. PTDC), iLub (2022.15609. UTA) and by the Taiho Kogyo Tribology Research Foundation (Grant No. 22A25). This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 101007417, having benefited from the access provided by the University of Namur in Namur Institute of Structured Matter within the framework of the NFFA-Europe Pilot Transnational.
