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Lubricants 2017, 5(2), 18; doi:10.3390/lubricants5020018

Lubricity Assessment, Wear and Friction of CNT-Based Structures in Nanoscale

Research Unit of Advanced, Composite, Nano-Materials and Nanotechnology, School of Chemical Engineering, National Technical University of Athens, Athens 15780, Greece
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Academic Editor: James E. Krzanowski
Received: 4 May 2017 / Revised: 9 June 2017 / Accepted: 13 June 2017 / Published: 16 June 2017
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Abstract

In this work, three case studies are reported, namely carbon nanotube/polyvinyl butyral composites, MWCNTs/polydimethylsiloxane-based coatings and vertically aligned CNT forest array, of which the friction and resistance to wear/deformation were assessed through nanoindentation/nanoscratch. Additional deformation parameters and findings are also addressed and discussed; namely, material deformation upwards (pile-up) or downwards (sink-in) with respect to the indented surface plane, hardness to modulus ratio (index of resistance to wear) and coefficient of friction. The enhancement of the scratch resistance due to the incorporation of CNTs in a polymer matrix is investigated. For the case of the forest structure, sliding between neighboring nanotubes is identified, while, through ploughing of the tip, local deformation and the extent of plasticity are also addressed. View Full-Text
Keywords: carbon nanotubes; composites; nanoscratch; coefficient of friction; nanoindentation; carbon carbon nanotubes; composites; nanoscratch; coefficient of friction; nanoindentation; carbon
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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. (CC BY 4.0).

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MDPI and ACS Style

Koumoulos, E.P.; Charitidis, C.A. Lubricity Assessment, Wear and Friction of CNT-Based Structures in Nanoscale. Lubricants 2017, 5, 18.

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