Effect of compressive strain on the Hertzian contact of self-mated fluorinated carbon films

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41604-41607 ◽  
Author(s):  
Renhui Zhang ◽  
Liping Wang
Keyword(s):  
First Principles ◽  
Compressive Strain ◽  
Carbon Films ◽  
Hertzian Contact ◽  
Low Friction ◽  
Friction Mechanism ◽  
Fluorinated Carbon ◽  
First Principles Method

The limitation of the low friction mechanism of self-mated fluorinated carbon films was well probed by the first-principles method.

scholarly journals Key Role of Transfer Layer in Load Dependence of Friction on Hydrogenated Diamond-Like Carbon Films in Humid Air and Vacuum

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1550 ◽  
Author(s):  
Yunhai Liu ◽  
Lei Chen ◽  
Bin Zhang ◽  
Zhongyue Cao ◽  
Pengfei Shi ◽  
...  
Keyword(s):  
Applied Load ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Low Friction ◽  
Transfer Layer ◽  
Humid Air ◽  
Friction Mechanism ◽  
Sharp Drop ◽  
Practical Applications ◽  
Load Dependence

The friction of hydrogenated diamond-like carbon (H-DLC) films was evaluated under the controlled environments of humid air and vacuum by varying the applied load. In humid air, there is a threshold applied load below which no obvious friction drop occurs and above which the friction decreases to a relatively low level following the running-in process. By contrast, superlubricity can be realized at low applied loads but easily fails at high applied loads under vacuum conditions. Further analysis indicates that the graphitization of the sliding H-DLC surface has a negligible contribution to the sharp drop of friction during the running-in process under both humid air and vacuum conditions. The low friction in humid air and the superlow friction in vacuum are mainly attributed to the formation and stability of the transfer layer on the counterface, which depend on the load and surrounding environment. These results can help us understand the low-friction mechanism of H-DLC film and define optimized working conditions in practical applications, in which the transfer layer can be maintained for a long time under low applied load conditions in vacuum, whereas a high load can benefit the formation of the transfer layer in humid air.

scholarly journals The Unusual Tribological Properties of Graphene/Antimonene Heterojunctions: A First-Principles Investigation

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1201
Author(s):  
Xian Jiang ◽  
Zhibin Lu ◽  
Renhui Zhang
Keyword(s):  
Tribological Properties ◽  
First Principles ◽  
2D Materials ◽  
Two Dimensional ◽  
Lateral Interactions ◽  
Low Friction ◽  
Friction Coefficients ◽  
Work Of Separation ◽  
First Principles Method

The extremely low friction between incommensurate two-dimensional (2D) materials has drawn more attention in the recent years. Structural superlubricity is a fascinating tribological phenomenon that is achieved in 2D heterojunctions despite the aligned or misaligned contacts that occur due to the disappearance of the lateral interactions between two incommensurate contacting surfaces. In this study, using the first-principles method, we report the computational realization of structural superlubricity for graphene/antimonene heterojunctions at the nanoscale. The calculated results clearly demonstrate that structural superlubricity between graphene and antimonene monolayers could be achieved under the misaligned contacts. The structural superlubricity is mainly attributed to lower work of separation, which maintains superlow friction coefficients.

Ultra-low friction mechanism of highly sp3-hybridized amorphous carbon controlled by interfacial molecule adsorption

2018 ◽  
Vol 20 (35) ◽  
pp. 22445-22454 ◽  
Author(s):  
Jing Shi ◽  
Tiandong Xia ◽  
Chengbing Wang ◽  
Kun Yuan ◽  
Junyan Zhang
Keyword(s):  
Amorphous Carbon ◽  
Carbon Materials ◽  
Carbon Films ◽  
Nanocrystalline Diamond ◽  
Diamond Like Carbon ◽  
Low Friction ◽  
Friction Mechanism ◽  
Molecule Adsorption

The friction behaviors of highly sp3-hybridized carbon films, including ultra-nanocrystalline diamond and diamond-like carbon materials, strongly depend on atmospheres.

Low friction mechanism of chlorine-doped amorphous carbon films sliding against an aluminium alloy

2017 ◽  
Vol 115 ◽  
pp. 573-579 ◽  
Author(s):  
Yuuki Tokuta ◽  
Takashi Itoh ◽  
Takahiko Shiozaki ◽  
Masahiro Kawaguchi ◽  
Shinya Sasaki
Keyword(s):  
Aluminium Alloy ◽  
Amorphous Carbon ◽  
Carbon Films ◽  
Low Friction ◽  
Friction Mechanism ◽  
Amorphous Carbon Films
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