Frictional properties of diamond-like carbon, glassy carbon and nitrides with femtosecond-laser-induced nanostructure |
| |
Authors: | Naoki Yasumaru Kenzo MiyazakiJunsuke Kiuchi Eisuke Sentoku |
| |
Affiliation: | a Department of Mechanical Engineering, Fukui National College of Technology, Sabae 916-8507, Japanb Institute of Advanced Energy, Kyoto University, Kyoto 611-0011, Japanc Eyetec Co., Ltd., Sabae 916-0016, Japand University of Fukui, Fukui 910-8507, Japan |
| |
Abstract: | This paper reports macro and micro frictional properties of DLC, TiN, CrN films and GC substrate of which surfaces are nanostructured with femtosecond (fs) laser pulses. The friction coefficient μ of the nanostructured surface was measured at a usual load with a ball-on-disk friction test machine. The results have shown that carbon materials of DLC and GC provide lower values of μ than TiN and CrN, and μ of DLC and TiN measured with a hardened steel ball decreases with an increase of the laser pulse energy. On the other hand, μ of nanostructured surfaces of thin films monotonously increases with an increase in laser pulse energy, which was measured with a micro-scratch test at an ultralight load of 1.5 mN utilizing a diamond tip. The friction coefficient of the GC substrate irradiated at a low fluence around the ablation threshold has shown a lower value than that of the non-irradiated surface. |
| |
Keywords: | Diamond-like carbon Glassy carbon Femtosecond-laser ablation Nanostructure Friction |
本文献已被 ScienceDirect 等数据库收录! |
|