Probing the low-friction mechanism of diamond-like carbon by varying of sliding velocity and vacuum pressure

Friction and wear behaviors of polycrystalline diamond under vacuum conditions

“…In addition, higher friction force will induce higher strain energy in the surface layer [24]. Relaxation of this strain energy can be achieved by remarkable atomic migration at the interfacial region, which induces the sp 3 -to-sp 2 structural transformation at a temperature far below the annealing temperature, according to the molecular dynamics simulation [26,27]. Therefore, it is reasonable that high friction coefficient and the catalyzing of Co result in the graphitization of PCD when the tribotest was performed under vacuum.…”

Tribological performance of an H-DLC coating prepared by PECVD

“…In spite of the outstanding properties of DLC coatings, the CoF and wear mechanisms depend significantly on the deposition method/parameters [1,5], variation in environment, either in vacuum or room atmosphere [6], relative humidity [7], the substrate and counterbody materials, the various coating architectures such as multiple or gradient layers, and very importantly, the wearing conditions, i.e. under dry, water, oil or a combination of these [8,9].…”

Synergistic improving of tribological properties of amorphous carbon film enhanced by F–Si-doped multilayer structure under corrosive environment

“…The amorphous carbon film has high hardness and elastic modulus values of 13.6 and 175 GPa, which further diamond-like feature of this film. Moreover, the hardness and elastic modulus would synchronously increase, and attain a maximum value simultaneously.However, this characteristic does not be observed in the thin amorphous carbon film as reported in our previous work [30]. In this article, the hardness and elastic modulus of the thin amorphous carbon film is examined as the values of 10.4 and 79 GPa.Especially, the hardness and elastic modulus of the amorphous carbon film containing F-Si-doped multilayer hierarchical structure is almost saturated over the whole displacement range, which may be attributed to synergistic improving of mechanical properties of the film enhanced by the F-Sidoped multilayer structure.…”