Presentation Information
[3E05]Tunable Friction via Electric Potential in Ionic Liquid Lubrication
*shouhei kawada1, Shinya Sasaki2 (1. Kyushu University, 2. Tokyo University of Science)
Friction between solid surfaces causes energy loss and wear. Lubricants are commonly used to mitigate these effects, but tribological demands are becoming increasingly severe. This study focuses on using ionic liquids as lubricants, which can form surface adsorption layers sensitive to electric potential. To explore this, a custom ball-on-disk tribometer with an electrochemical unit was developed. The disk (SUJ2 with DLC coating) served as the working electrode, and a platinum coil was used as the counter electrode. Tests were performed under 0.6 N load (390 MPa) and 3.1 mm/s sliding speed, with or without applied electric potential. Results showed that applying a constant potential reduced the friction coefficient, suggesting that potential-induced changes in ionic liquid adsorption can enable friction control.