title: A near-wearless and extremely long lifetime amorphous carbon film under high vacuum.
abstract: Prolonging wear life of amorphous carbon films under vacuum was an enormous challenge. In this work, we firstly reported that amorphous carbon film as a lubricant layer containing hydrogen, oxygen, fluorine and silicon (a-C:H:O:F:Si) exhibited low friction (~0.1), ultra-low wear rate (9.0 × 10(-13) mm(3) N(-1) mm(-1)) and ultra-long wear life (>2 × 10(6) cycles) under high vacuum. We systematically examined microstructure and composition of transfer film for understanding of the underlying frictional mechanism, which suggested that the extraordinarily excellent tribological properties were attributed to the thermodynamically and structurally stable FeF2 nanocrystallites corroborated using first-principles calculations, which were induced by the tribochemical reaction.
authors.affiliation: State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China.
authors.forename: Liping
authors.initials: L
authors.lastname: Wang
authors.affiliation: 1] State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China [2] University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Renhui
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Department of Materials Chemistry, The Ångström Laboratory, Uppsala University, box 538, SE-751 21 Uppsala, Sweden.
authors.forename: Ulf
authors.initials: U
authors.lastname: Jansson
authors.affiliation: Department of Materials Chemistry, The Ångström Laboratory, Uppsala University, box 538, SE-751 21 Uppsala, Sweden.
authors.forename: Nils
authors.initials: N
authors.lastname: Nedfors