The effect of oxygen on the tribology of (PEI/GO)15 multilayer solid lubricant coatings on steel substrates

Prabakaran Saravanan; Roman Selyanchyn; Hiroyoshi Tanaka; Shigenori Fujikawa; Stephen Matthew Lyth; Joichi Sugimura

doi:10.1016/j.wear.2019.05.035

The effect of oxygen on the tribology of (PEI/GO)₁₅ multilayer solid lubricant coatings on steel substrates

Prabakaran Saravanan^*, Roman Selyanchyn, Hiroyoshi Tanaka, Shigenori Fujikawa, Stephen Matthew Lyth, Joichi Sugimura

^*Corresponding author for this work

Chemical And Process Engineering

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

5 Citations (Scopus)

Abstract

Multilayers of polyethyleneimine and graphene oxide, (PEI/GO)₁₅, were coated onto steel substrates via electrostatic layer-by-layer (LbL) deposition, and their tribological properties were investigated as solid lubricants. The coefficient of friction (COF) and specific wear rate (SWR) were measured against a poly(methyl methacrylate) (PMMA) counterface ball, in various gas environments with different oxygen concentrations. The COF and SWR both significantly decreased with decreasing oxygen content. Detailed surface characterization of the contact area of the counterface ball revealed that continuous transfer films were formed in oxygen-free environments, but not in oxygen-rich environments. This is attributed to an increased proportion of sp³ bonding in the wear debris in the presence of oxygen (as confirmed by Raman spectroscopy), as well as possible suppression of wear debris adhesion on the counterface ball due to oxygen adsorption on the surface.

Original language	English
Article number	102920
Number of pages	7
Journal	Wear
Volume	432-433
DOIs	https://doi.org/10.1016/j.wear.2019.05.035
Publication status	Published - 15 Aug 2019

Keywords

friction
graphene oxide
layer-by-layer
oxygen effect
solid lubricant
transfer layer
wear

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10.1016/j.wear.2019.05.035

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title = "The effect of oxygen on the tribology of (PEI/GO)15 multilayer solid lubricant coatings on steel substrates",

abstract = "Multilayers of polyethyleneimine and graphene oxide, (PEI/GO)15, were coated onto steel substrates via electrostatic layer-by-layer (LbL) deposition, and their tribological properties were investigated as solid lubricants. The coefficient of friction (COF) and specific wear rate (SWR) were measured against a poly(methyl methacrylate) (PMMA) counterface ball, in various gas environments with different oxygen concentrations. The COF and SWR both significantly decreased with decreasing oxygen content. Detailed surface characterization of the contact area of the counterface ball revealed that continuous transfer films were formed in oxygen-free environments, but not in oxygen-rich environments. This is attributed to an increased proportion of sp3 bonding in the wear debris in the presence of oxygen (as confirmed by Raman spectroscopy), as well as possible suppression of wear debris adhesion on the counterface ball due to oxygen adsorption on the surface.",

keywords = "friction, graphene oxide, layer-by-layer, oxygen effect, solid lubricant, transfer layer, wear",

author = "Prabakaran Saravanan and Roman Selyanchyn and Hiroyoshi Tanaka and Shigenori Fujikawa and Lyth, {Stephen Matthew} and Joichi Sugimura",

note = "Funding Information: This work was supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan, and the Japan Science and Technology Agency , JST-CREST program with Grant Number: JPMJCR13C1 , Japan. Shugo Onitsuka, Kazumi Okada, Takehiro Morita and Yoshie Kurono are gratefully acknowledged for the technical and administrative assistance. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V. Prabakaran Saravanan, Roman Selyanchyn, Hiroyoshi Tanaka, Shigenori Fujikawa, Stephen Matthew Lyth, Joichi Sugimura, The effect of oxygen on the tribology of (PEI/GO)15 multilayer solid lubricant coatings on steel substrates, Wear, Volumes 432–433, 2019, 102920, https://doi.org/10.1016/j.wear.2019.05.035.",

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AU - Saravanan, Prabakaran

AU - Selyanchyn, Roman

AU - Tanaka, Hiroyoshi

AU - Fujikawa, Shigenori

AU - Lyth, Stephen Matthew

AU - Sugimura, Joichi

N1 - Funding Information: This work was supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan, and the Japan Science and Technology Agency , JST-CREST program with Grant Number: JPMJCR13C1 , Japan. Shugo Onitsuka, Kazumi Okada, Takehiro Morita and Yoshie Kurono are gratefully acknowledged for the technical and administrative assistance. Publisher Copyright: © 2019 Elsevier B.V. Prabakaran Saravanan, Roman Selyanchyn, Hiroyoshi Tanaka, Shigenori Fujikawa, Stephen Matthew Lyth, Joichi Sugimura, The effect of oxygen on the tribology of (PEI/GO)15 multilayer solid lubricant coatings on steel substrates, Wear, Volumes 432–433, 2019, 102920, https://doi.org/10.1016/j.wear.2019.05.035.

PY - 2019/8/15

Y1 - 2019/8/15

N2 - Multilayers of polyethyleneimine and graphene oxide, (PEI/GO)15, were coated onto steel substrates via electrostatic layer-by-layer (LbL) deposition, and their tribological properties were investigated as solid lubricants. The coefficient of friction (COF) and specific wear rate (SWR) were measured against a poly(methyl methacrylate) (PMMA) counterface ball, in various gas environments with different oxygen concentrations. The COF and SWR both significantly decreased with decreasing oxygen content. Detailed surface characterization of the contact area of the counterface ball revealed that continuous transfer films were formed in oxygen-free environments, but not in oxygen-rich environments. This is attributed to an increased proportion of sp3 bonding in the wear debris in the presence of oxygen (as confirmed by Raman spectroscopy), as well as possible suppression of wear debris adhesion on the counterface ball due to oxygen adsorption on the surface.

AB - Multilayers of polyethyleneimine and graphene oxide, (PEI/GO)15, were coated onto steel substrates via electrostatic layer-by-layer (LbL) deposition, and their tribological properties were investigated as solid lubricants. The coefficient of friction (COF) and specific wear rate (SWR) were measured against a poly(methyl methacrylate) (PMMA) counterface ball, in various gas environments with different oxygen concentrations. The COF and SWR both significantly decreased with decreasing oxygen content. Detailed surface characterization of the contact area of the counterface ball revealed that continuous transfer films were formed in oxygen-free environments, but not in oxygen-rich environments. This is attributed to an increased proportion of sp3 bonding in the wear debris in the presence of oxygen (as confirmed by Raman spectroscopy), as well as possible suppression of wear debris adhesion on the counterface ball due to oxygen adsorption on the surface.

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KW - layer-by-layer

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The effect of oxygen on the tribology of (PEI/GO)₁₅ multilayer solid lubricant coatings on steel substrates

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