Tribology dependence on both structures of bulk a-C:H:Si films and transfer layer via adjustable Si content

Wang, Junyan; Xing, Zhaoyang; Gao, Kaixiong; Pei, Yang; Xu, Chengyu; Wang, Xin; Lin, Zhang

doi:10.1016/j.diamond.2023.110159

Diamond and Related Materials

2023

DOI: 10.1016/j.diamond.2023.110159

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Tribology dependence on both structures of bulk a-C:H:Si films and transfer layer via adjustable Si content

Junyan Wang

Zhaoyang Xing

Kaixiong Gao

et al.

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2024

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A-C/Au Film with Low Humidity Sensitivity of Friction by Forming Au Transfer Film

Pei,

Ji,

et al. 2024

Materials

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Amorphous carbon is recognized as an excellent lubricating material; however, its tribological properties are significantly influenced by humidity. To elucidate the mechanism underlying this humidity dependence and to propose a novel enhancement method, we investigated and compared the tribological properties of hydrogenated amorphous carbon (a-C:H) and amorphous carbon/gold (a-C/Au) composite films. First, the friction coefficient of these carbon films under different humidity conditions was tested using a rotational ball-on-disk tribometer. Subsequently, we analyzed the morphology and structure of the sliding interface employing optical microscopy (OM), Raman spectroscopy, transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). Finally, first-principle calculations were carried out to calculate the adsorption energy of water molecules on different surfaces. The results indicate that the friction coefficient of a-C:H film and the area of transfer film increase with the increase of humidity. This phenomenon can be attributed to the fact that water molecules enhance the interaction between the a-C:H film and steel counterfaces. Notably, in contrast, the friction coefficient of a-C/Au film demonstrates low sensitivity to humidity due to the formation of an Au transfer film that exhibits weak interaction with water molecules. These findings provide a promising strategy for developing environment-adaptive amorphous carbon films and play an important role in promoting the development of intelligent lubricating film.

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A-C/Au Film with Low Humidity Sensitivity of Friction by Forming Au Transfer Film

Pei,

Ji,

et al. 2024

Materials

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show abstract

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Tribology dependence on both structures of bulk a-C:H:Si films and transfer layer via adjustable Si content

Cited by 1 publication

References 47 publications

A-C/Au Film with Low Humidity Sensitivity of Friction by Forming Au Transfer Film

A-C/Au Film with Low Humidity Sensitivity of Friction by Forming Au Transfer Film

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