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Journal of Nanomaterials
Volume 2014, Article ID 852386, 8 pages
Research Article

Tribological Performance of Silahydrocarbons Used as Steel-Steel Lubricants under Vacuum and Atmospheric Pressure

1State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Received 6 March 2014; Accepted 2 April 2014; Published 16 April 2014

Academic Editor: Jun Yang

Copyright © 2014 Hai-Zhong Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The silahydrocarbons of tetraalkylsilanes with different substituted alkyl groups (named as SiCH) were synthesized and evaluated as lubricants for steel-steel contacts by a home-made vacuum four-ball tribometer (VFBT-4000) under atmospheric pressure and under vacuum pressure (  Pa). The SiCH oils possess better thermal stability, low temperature fluidity, and lower saturated vapor pressure than those of multialkylatedcyclopentanes (MACs). The tribological performances of the SiCH oils are also superior to those of MACs and PFPE-Z25 in terms of friction-reduction ability and antiwear capacity under sliding friction at vacuum. The SEM/EDS and XPS results reveal that the boundary lubricating film consisting of compounds is formed by tribochemical reactions and serious adhesion wear under atmospheric pressure and the film consisting of compounds is formed on the worn surface under vacuum pressure.