Surface composition variation and high-vacuum performance of DLC/ILs solid-liquid lubricating coatings: Influence of space irradiation

► A DLC/ILs solid-liquid lubricating coatings were fabricated. ► A ground-based simulation facility was employed to carry out the four irradiation experiments. ► Radiations effect the surface composition, structure and morphology of DLC and IL liquid lubricant. ► The tribological properties under high vacuum condition were investigated.