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http://dx.doi.org/10.1016/j.tsf.2006.03.034

has been cited by the following article:

• TITLE: Influence of Wettability and Mechanical Properties on Tribological Performance of DLC Coatings under Water Lubrication

  AUTHORS: Chaoqun Zhang, Masahiro Fujii

  KEYWORDS: DLC, Friction, Wettability, Hardness, Water Lubrication

  JOURNAL NAME: Journal of Surface Engineered Materials and Advanced Technology, Vol.5 No.3, June 8, 2015

  ABSTRACT: DLC coatings are currently used in a wide variety of industrial fields because of their outstanding properties such as high hardness, high wear resistance, low friction and so on under oil lubrication as well as no lubrication. In order to evaluate the tribological performance of DLC coatings under water lubrication, eight types of DLC coatings were evaluated by water-lubricated sliding tests at sliding velocities of 0.02 m/s and 0.1 m/s. The different DLC coating types comprised both hydrogenated and hydrogen-free DLC films that were deposited using different techniques: amorphous hydrogenated DLC (a-C:H), that doped with tungsten (a-C:H:W), that doped with silicon (a-C:H:Si) and hydrogen-free DLC (ta-C). DLC coatings showed low friction coefficient and excellent wear resistance. Friction coefficient and wear rate decreased with increasing sliding velocity. The effect of surface wettability and mechanical properties on tribological characteristics was investigated. Friction coefficient decreased as the contact angle increased. Hydrogen-free DLC coating with the highest hardness showed the highest friction and a larger wear rate. Furthermore, DLC coatings deposited with interlayer showed longer lifetimes.