Dry sliding and boundary lubrication performance of a UHMWPE/CNTs nanocomposite coating on steel substrates at elevated temperatures

M. Abdul Samad; Sujeet K. Sinha

doi:10.1016/j.wear.2010.11.011

Dry sliding and boundary lubrication performance of a UHMWPE/CNTs nanocomposite coating on steel substrates at elevated temperatures

M. Abdul Samad
, Sujeet K. Sinha^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

70 Scopus citations

Abstract

A nanocomposite polymer coating of ultra-high molecular weight polyethylene (UHMWPE) reinforced with 0.1. wt% of single-walled carbon nanotubes (SWCNTs) is developed and coated onto steel substrates for a possible application as a boundary lubricant in bearings and gears. Since temperature is one of the predominant factors in determining the tribological performance of polymer coatings, friction and wear experiments were carried out at elevated temperatures. Experiments are performed on a custom-built tribometer simulating high contact pressures under dry and base oil lubricated conditions. Wear mechanisms of the nanocomposite coating and the counterface material are studied using optical profilometry. FESEM images are used to study the wear morphology of the coating. Possible changes in the crystallinity of the polymer due to temperature changes are studied by XRD. It is observed that the addition of SWCNTs to the polymer matrix not only helps in improving the mechanical properties such as hardness and the load bearing capacity of the coating but also enhances its frictional and wear properties at elevated temperatures.

Original language	English
Pages (from-to)	395-402
Number of pages	8
Journal	Wear
Volume	270
Issue number	5-6
DOIs	https://doi.org/10.1016/j.wear.2010.11.011
State	Published - 10 Feb 2011
Externally published	Yes

Bibliographical note

Funding Information:
This study was funded by a research grant from the Faculty of Engineering, NUS (Grant# R-265-000-248-112 ). We also wish to thank Mr. K.C. Chung, Ticona Representative Office, Singapore, for donating UHMWPE powder for this study. One of the authors (M. Abdul Samad) would like to acknowledge the Graduate School of Engineering, NUS for the scholarship awarded to support his studies at NUS.

Keywords

Boundary lubrication
Lubricated wear
Polymers
Solid lubricant coatings

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.wear.2010.11.011

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title = "Dry sliding and boundary lubrication performance of a UHMWPE/CNTs nanocomposite coating on steel substrates at elevated temperatures",

abstract = "A nanocomposite polymer coating of ultra-high molecular weight polyethylene (UHMWPE) reinforced with 0.1. wt\% of single-walled carbon nanotubes (SWCNTs) is developed and coated onto steel substrates for a possible application as a boundary lubricant in bearings and gears. Since temperature is one of the predominant factors in determining the tribological performance of polymer coatings, friction and wear experiments were carried out at elevated temperatures. Experiments are performed on a custom-built tribometer simulating high contact pressures under dry and base oil lubricated conditions. Wear mechanisms of the nanocomposite coating and the counterface material are studied using optical profilometry. FESEM images are used to study the wear morphology of the coating. Possible changes in the crystallinity of the polymer due to temperature changes are studied by XRD. It is observed that the addition of SWCNTs to the polymer matrix not only helps in improving the mechanical properties such as hardness and the load bearing capacity of the coating but also enhances its frictional and wear properties at elevated temperatures.",

keywords = "Boundary lubrication, Lubricated wear, Polymers, Solid lubricant coatings",

author = "Samad, \{M. Abdul\} and Sinha, \{Sujeet K.\}",

note = "Funding Information: This study was funded by a research grant from the Faculty of Engineering, NUS (Grant\# R-265-000-248-112 ). We also wish to thank Mr. K.C. Chung, Ticona Representative Office, Singapore, for donating UHMWPE powder for this study. One of the authors (M. Abdul Samad) would like to acknowledge the Graduate School of Engineering, NUS for the scholarship awarded to support his studies at NUS. ",

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doi = "10.1016/j.wear.2010.11.011",

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journal = "Wear",

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AU - Samad, M. Abdul

AU - Sinha, Sujeet K.

N1 - Funding Information: This study was funded by a research grant from the Faculty of Engineering, NUS (Grant# R-265-000-248-112 ). We also wish to thank Mr. K.C. Chung, Ticona Representative Office, Singapore, for donating UHMWPE powder for this study. One of the authors (M. Abdul Samad) would like to acknowledge the Graduate School of Engineering, NUS for the scholarship awarded to support his studies at NUS.

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N2 - A nanocomposite polymer coating of ultra-high molecular weight polyethylene (UHMWPE) reinforced with 0.1. wt% of single-walled carbon nanotubes (SWCNTs) is developed and coated onto steel substrates for a possible application as a boundary lubricant in bearings and gears. Since temperature is one of the predominant factors in determining the tribological performance of polymer coatings, friction and wear experiments were carried out at elevated temperatures. Experiments are performed on a custom-built tribometer simulating high contact pressures under dry and base oil lubricated conditions. Wear mechanisms of the nanocomposite coating and the counterface material are studied using optical profilometry. FESEM images are used to study the wear morphology of the coating. Possible changes in the crystallinity of the polymer due to temperature changes are studied by XRD. It is observed that the addition of SWCNTs to the polymer matrix not only helps in improving the mechanical properties such as hardness and the load bearing capacity of the coating but also enhances its frictional and wear properties at elevated temperatures.

AB - A nanocomposite polymer coating of ultra-high molecular weight polyethylene (UHMWPE) reinforced with 0.1. wt% of single-walled carbon nanotubes (SWCNTs) is developed and coated onto steel substrates for a possible application as a boundary lubricant in bearings and gears. Since temperature is one of the predominant factors in determining the tribological performance of polymer coatings, friction and wear experiments were carried out at elevated temperatures. Experiments are performed on a custom-built tribometer simulating high contact pressures under dry and base oil lubricated conditions. Wear mechanisms of the nanocomposite coating and the counterface material are studied using optical profilometry. FESEM images are used to study the wear morphology of the coating. Possible changes in the crystallinity of the polymer due to temperature changes are studied by XRD. It is observed that the addition of SWCNTs to the polymer matrix not only helps in improving the mechanical properties such as hardness and the load bearing capacity of the coating but also enhances its frictional and wear properties at elevated temperatures.

KW - Boundary lubrication

KW - Lubricated wear

KW - Polymers

KW - Solid lubricant coatings

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DO - 10.1016/j.wear.2010.11.011

M3 - Article

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IS - 5-6

ER -

Dry sliding and boundary lubrication performance of a UHMWPE/CNTs nanocomposite coating on steel substrates at elevated temperatures

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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