Carbon Nanotube-Based Adaptive Solid Lubricant Composites
Authors: Church, A.H.; Zhang, X.F.; Sirota, B.; Kohli, P.; Aouadi, S.M.; Talapatra, S.
Source: Advanced Science Letters, Volume 5, Number 1, January 2012 , pp. 188-191(4)
Publisher: American Scientific Publishers
Abstract:We report on the investigation of the frictional properties of solid lubricants based on carbon nanotube (CNT) composites. Self-lubricating CNT composites were created by electrodepositing molybdenum disulfide (MoS2) or silver (Ag) on multiwalled carbon nanotubes (MWNTs). MWNT/MoS2 was found to display a lower friction coefficient both in humid (∼0.16) as well as dry (∼0.05) air and was able to sustain its frictional properties under non-humid/humid cycled environments. Similarly, the tribological properties of CNT/Ag composites were found to be improved in comparison to their constituent materials both at 25 °C and at 500 °C. These results show that combining CNTs with other solid lubricants may be a viable approach for the creation of a new class of adaptive tribological coatings where strength is provided by the CNTs, and lubrication is provided by graphite (created when CNT surfaces are worn) or by additional solid lubricants.
Document Type: Research article
Publication date: 2012-01-01
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