Diamond-like Carbon – The Coatings Design and Tribological Performance

Description

Diamond-like carbon (DLC) coatings are recognized for their superior tribological performance. Usually, their wear rate accelerates with increasing contact stresses and thus DLC durability is compromised. The literature reflects a majority of DLC tribological studies remained limited up to ~ 2.0 GPa contact stress, and few have been demonstrated up to ~ 4.0 GPa, with wear rates higher than ~ 6.0 × 10−8 mm3/Nm irrespective of contact pressure. In aspiration to develop durable hydrogen-free DLC coatings with lower wear rates against high contact stresses, a one-step in-situ microstructural tailoring is performed to re-design DLC architecture. A range of DLC designs such as three-dimensionally isolated carbon nanoparticles embedded DLC, unique hard/soft bilayer DLC/DLC [1] etc are prepared with a magnetron sputtering system. The best DLC designs have demonstrated wear rates lower than ~ 6.0 × 10−8 mm3/Nm and survive beyond 2.0 GPa contact stresses. It is conceived that the addition of carbon nanoparticles to DLC can reduce wear rates as low as 8.0 × 10−9 mm3/Nm at ~ 3.0 GPa contact stress. Whereas, the bilayer designs have demonstrated their better potential to survive high contact stresses, i.e., up to ~ 4.0 GPa. Durable and antiwear DLC coatings against high contact pressures have good potential to reduce mechanical and energy losses, particularly in the automotive and aerospace sectors, for emerging DLC markets [2] and a way forward to NetZero manufacturing.

Period	17 Oct 2024
Event title	76th Fall Academic Conference/40th Anniversary Commemoration Event - Korean Tribology Society 제76회 추계학술대회/창립40주년 기념행사 안내
Event type	Conference
Location	Yeosu-si, Korea, Republic ofShow on map