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http://dx.doi.org/10.9725/kts.2018.34.6.313

Tribological Properties of Carbon Nanotube Thin Films by using Electrodynamic Spraying Method  

Kim, Chang-Lae (Department of Mechanical Engineering, Chosun University)
Kim, Dae-Eun (Department of Mechanical Engineering, Yonsei University)
Kim, Hae-Jin (School of Mechanical and Aerospace Engineering, Gyeongsang National University)
Publication Information
Tribology and Lubricants / v.34, no.6, 2018 , pp. 313-317 More about this Journal
Abstract
Carbon-based coatings, including carbon nanotubes (CNTs), graphene, and buckyball ($C_{60}$), receive much interest because of their outstanding mechanical and electrical properties for a wide range of electromechanical component-based applications. Previous experimental results demonstrate that these carbon-based coatings are promising solid lubricants because of their superior tribological properties, and thus help prolong the lifetime of silicon-based applications. In this study, CNT coatings are deposited on a bare silicon (100) substrate by electrodynamic spraying under different deposition conditions. During the coating deposition, the applied voltage, CNT concentration of the solution, distance between the injecting nozzle and the substrate and diameter of the injecting nozzle are optimized to control the thickness and surface roughness of the CNT coatings. The surface morphology and thickness of the coatings are characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. The friction and wear properties of the coatings are investigated by using a pin-on-reciprocating-type tribotester under various experimental conditions. The friction coefficient of the CNT coating is as low as 0.15 under high normal loads. The overall results reveal that CNT coatings deposited by electrodynamic spraying provide relatively uniform with superior lubrication performance.
Keywords
solid lubricants; carbon nanotube; friction; wear;
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Times Cited By KSCI : 2  (Citation Analysis)
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