▎ 摘　　要

It is important to distinguish the friction behavior between 2D hydrogenated diamond-like film (HDLF) and bilayer graphene (BG), which makes it difficult to determine the friction mechanisms due to the complexity of the sliding interface. Nano-scratch simulation is carried out to investigate the change of the average friction force and the degree of friction of the epitaxial 2D carbon film covering the surface of 4H-SiC under different normal loads. The results show that along with the increase of normal load, the average friction force on the interface of HDLF increases sharply compared with that in BG. During the stick-slip process, the huge damping produced by HDLF differs from the friction behavior of BG films due to the fast transport of phonons at the interface.