A novel low-rotation-speed dynamic friction polishing of diamond

The super-high polishing speed is a prerequisite in conventional dynamic friction polishing, which inevitably causes many limitations and security risks. This paper proposes a novel low-rotation-speed dynamic friction polishing technology for diamonds assisted by ultraviolet light irradiation. The results illustrated that the diamond sample irradiated by ultraviolet light could be effectively polished. The phase transformation and oxidation process promoted by ultraviolet light is the primary mechanism for achieving effective material removal at a low-rotation speed. An ultra-smooth diamond surface with surface roughness Rq = 0.26 nm & Ra = 0.18 nm was obtained with the 8 m/s speed. This study provides a new diamond polishing technology and significantly reduces the application threshold of dynamic diamond polishing technology.