Entry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication

Carbon nanomaterials have been studied for their promising tribological properties under boundary lubrication. However, the behavior of carbon nanomaterials upon entering narrow friction interfaces under boundary lubrication is poorly understood. In this study, to clarify how graphene oxide (GO), wh...

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Autores principales:	Hiroshi Kinoshita, Masanori Shibata, Naohiro Matsumoto
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2020
Materias:	entry behavior wedge effect boundary lubrication friction interface graphene oxide carbon nanomaterials Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/4df2078597ad47d29fba3dd3d0d44533
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spelling	oai:doaj.org-article:4df2078597ad47d29fba3dd3d0d445332021-11-05T09:10:33ZEntry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication1881-219810.2474/trol.15.150https://doaj.org/article/4df2078597ad47d29fba3dd3d0d445332020-06-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/15/3/15_150/_pdf/-char/enhttps://doaj.org/toc/1881-2198Carbon nanomaterials have been studied for their promising tribological properties under boundary lubrication. However, the behavior of carbon nanomaterials upon entering narrow friction interfaces under boundary lubrication is poorly understood. In this study, to clarify how graphene oxide (GO), which is one of the carbon nanomaterials, enters and works on a friction interface under boundary lubrication, in situ observations of a friction interface between an SUJ2 ball and soda glass-lime disk in a GO water dispersion, with a load of 1 N, were conducted using optical microscopy. Isolated dispersed GO accumulated only in front of the contact areas. GO accumulations formed, grew, and peeled off due to the friction. Although the GO accumulations were significantly unstable, they functioned as friction reduction and anti-wear. We firstly found that the unstable GO lubricating accumulations that formed in front of the contact areas were able to widen between the ball and the disk similar to a wedge; this wedge effect would cause a decrease in friction and wear. Unlike the wedge effect under hydrodynamic lubrication, the GO accumulations that functioned as the wedge stayed on the ball surface.Hiroshi KinoshitaMasanori ShibataNaohiro MatsumotoJapanese Society of Tribologistsarticleentry behaviorwedge effectboundary lubricationfriction interfacegraphene oxidecarbon nanomaterialsPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 15, Iss 3, Pp 150-153 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	entry behavior wedge effect boundary lubrication friction interface graphene oxide carbon nanomaterials Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	entry behavior wedge effect boundary lubrication friction interface graphene oxide carbon nanomaterials Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Hiroshi Kinoshita Masanori Shibata Naohiro Matsumoto Entry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication
description	Carbon nanomaterials have been studied for their promising tribological properties under boundary lubrication. However, the behavior of carbon nanomaterials upon entering narrow friction interfaces under boundary lubrication is poorly understood. In this study, to clarify how graphene oxide (GO), which is one of the carbon nanomaterials, enters and works on a friction interface under boundary lubrication, in situ observations of a friction interface between an SUJ2 ball and soda glass-lime disk in a GO water dispersion, with a load of 1 N, were conducted using optical microscopy. Isolated dispersed GO accumulated only in front of the contact areas. GO accumulations formed, grew, and peeled off due to the friction. Although the GO accumulations were significantly unstable, they functioned as friction reduction and anti-wear. We firstly found that the unstable GO lubricating accumulations that formed in front of the contact areas were able to widen between the ball and the disk similar to a wedge; this wedge effect would cause a decrease in friction and wear. Unlike the wedge effect under hydrodynamic lubrication, the GO accumulations that functioned as the wedge stayed on the ball surface.
format	article
author	Hiroshi Kinoshita Masanori Shibata Naohiro Matsumoto
author_facet	Hiroshi Kinoshita Masanori Shibata Naohiro Matsumoto
author_sort	Hiroshi Kinoshita
title	Entry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication
title_short	Entry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication
title_full	Entry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication
title_fullStr	Entry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication
title_full_unstemmed	Entry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication
title_sort	entry behavior into friction interface and forming unstable lubricating accumulation of graphene oxide between suj2 ball and glass disk under boundary lubrication
publisher	Japanese Society of Tribologists
publishDate	2020
url	https://doaj.org/article/4df2078597ad47d29fba3dd3d0d44533
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Entry behavior into Friction Interface and Forming Unstable Lubricating Accumulation of Graphene Oxide between SUJ2 Ball and Glass Disk under Boundary Lubrication

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