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Effect of MWCNTs/Talc powder nanoparticles on the tribological and thermal conductivity performance of calcium grease

Ahmed Mobasher (Ameeria Integrated Technical Education Cluster, Cairo, Egypt)
Alaa Khalil (Department of Mechanical Engineering, Egypt Nanotechnology Center, Candian International College, Cairo, Egypt)
Medhat Khashaba (Department of Mechanical Design and Production Engineering, Minia University, El Minia, Egypt)
Tarek Osman (Department of Mechanical Design and Production Engineering, Cairo University, Giza, Egypt)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 16 August 2019

Issue publication date: 14 January 2020

Abstract

Purpose

The purpose of this paper is to evaluate the influence of nanoparticles as an additive on the tribological properties of calcium grease.

Design/methodology/approach

The nano additives in this research are with different concentration of multi carbon nanotubes (MWCNTs) and Talc powder (1, 2, 3, 3 and 5 per cent). The ratio of MWCNTs to Talc powder is 1:1. The tribological properties of hyper MWCNTs/Talc powder to calcium grease were evaluated using a pin-on-disk wear testing. The results show that the nano additives MWCNTs/Talc to calcium grease exhibit good performance in anti-wear and friction reduction. The action mechanism was estimated through analysis of the worm surface with x-ray diffraction and transmission electron microscope.

Findings

The result indicates that boundary film mainly composed of MWCNT and Talc powder, and other organic compound was formed on the worm surface during the friction test. In addition, the wear rate and coefficient of friction of nanogreases have shown excellent improvement about 80.62 and 63.44 per cent, respectively, at 4 Wt.% of MWCNTs/Talc powder. Moreover, the thermal conductivity of nanogrease increased about 51.72 per cent.

Originality/value

This study describes the inexpensive and simple fabrication of nanogrease for improving properties of lubricants, which improve power efficiency and extend lifetimes of mechanical equipment.

Keywords

Acknowledgements

Conflict of interest. The authors declare that they have no conflict of interest.

Citation

Mobasher, A., Khalil, A., Khashaba, M. and Osman, T. (2020), "Effect of MWCNTs/Talc powder nanoparticles on the tribological and thermal conductivity performance of calcium grease", Industrial Lubrication and Tribology, Vol. 72 No. 1, pp. 9-14. https://doi.org/10.1108/ILT-03-2019-0102

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited