Li, Xiaowei Du, Naizhou Feng, Cunao Chen, Kai Wei, Xubing Zhang, Dekun Lee, Kwang-Ryeol 2024-01-19T10:00:35Z 2024-01-19T10:00:35Z 2023-02-17 2023-04 0169-4332 https://pubs.kist.re.kr/handle/201004/113888 Amorphous carbon (a-C) film as one of the most promising superlubricious materials arouses much attention from technical and industrial fields. However, the superlubricious state of a-C film strongly depends on the formation of special nanostructures or components, increasing the difficulty and complexity of the preparation process. Reducing the friction coefficient of a-C film to superlubricity is still a challenge for industrial scale-up. Herein, a simple and effective approach is proposed to achieve superlubricity by in-situ formation of graphitized structure at a-C surface via fast annealing. Results reveal that the friction property closely depends on the graphitized degree of mated a-C surfaces and the friction coefficient below 0.01 or even 0.001 can be obtained for the highly graphitized system. In particular, under extreme working condition, it also demonstrates excellent stability and reliability of superlubricious behavior. This is not only mainly attributed to the decrease of spacing distance between mated graphitized structures following the high repulsive force, but also related to the tight anchoring of graphitized structure to the intrinsic a-C. In addition, compared to the widely applied surface passivation approach, the graphitization modification of a-C surface exhibits higher effectiveness in super -lubricity without deteriorating the intrinsic mechanical properties of a-C film. English Elsevier BV Theoretical superlubricity and its friction stability of amorphous carbon film induced by simple surface graphitization Article 10.1016/j.apsusc.2022.156318 1 Applied Surface Science, v.615 Applied Surface Science 615 N scie scopus 000921537600001 2-s2.0-85145972039 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article DIAMOND-LIKE CARBON GLOBAL ENERGY-CONSUMPTION MOLECULAR-DYNAMICS MECHANISM WEAR TRIBOLOGY INSIGHTS BEHAVIOR Amorphous carbon Graphitization Superlubricity Annealing Friction stability