Low Friction at the Nanoscale of Hydrogenated Fullerene-Like Carbon Films

Coatings

Zhao Liu¹  Thilo Glatzel¹  Antoine Hinaut¹  Ernst Meyer¹  Junyan Zhang²  Yongfu Wang² 

[1] Department of Physics, University of Basel, 4056 Basel, Switzerland;State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

关键词: fullerene-like;    carbon films;    friction;    hydrogen concentration;   

DOI  :  10.3390/coatings10070643

来源: DOAJ

【 摘 要 】

Friction force microscopy experiments at the nanometer scale are applied to study low friction of hydrogenated fullerene-like carbon films. The measured friction coefficients indicate that lower hydrogen concentration during preparation is beneficial to enter the low friction regime, especially in combination with only methane as precursor. Furthermore, two regions are found with distinct friction coefficients and surface roughnesses related to different surface structures. One is rich in amorphous carbon and the other is rich in fullerene-like carbon, dispersed on the same surface. Transmission electron microscopy and Raman spectroscopy images verify this observation of the two separated structures, especially with the extracted fullerene-like structures in the wear debris from macro friction experiments. It is speculated that hydrogen may tend to impair the growth of fullerene-like carbon and is therefore detrimental for lubricity.

【 授权许可】

Unknown