Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil

The tribological properties of diamond-like carbon (DLC) films that were lubricated with an environmentally friendly ester-based oil were investigated. Sliding tests were performed on two types of DLC films, hydrogenated amorphous carbon (a-C:H) and tetrahedral amorphous carbon (ta-C) films, using a...

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Autores principales:	Hikaru Okubo, Seiya Watanabe, Chiharu Tadokoro, Shinya Sasaki
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2016
Materias:	diamond-like carbon tetrahedral amorphous carbon hydrogenated amorphous carbon ester-based oils quartz-crystal microbalance with dissipation ultralow friction 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/e6fd9deabd604b93ad70ce6e8709018a
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spelling	oai:doaj.org-article:e6fd9deabd604b93ad70ce6e8709018a2021-11-05T09:21:40ZUltralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil1881-219810.2474/trol.11.102https://doaj.org/article/e6fd9deabd604b93ad70ce6e8709018a2016-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/11/2/11_102/_pdf/-char/enhttps://doaj.org/toc/1881-2198The tribological properties of diamond-like carbon (DLC) films that were lubricated with an environmentally friendly ester-based oil were investigated. Sliding tests were performed on two types of DLC films, hydrogenated amorphous carbon (a-C:H) and tetrahedral amorphous carbon (ta-C) films, using a steel cylinder that was in contact with a steel disk coated with either a-C:H or ta-C under boundary lubrication. To compare the tribological properties of ester-based oils and other based oils, Trimethylolpropane (TMP) ester, polypropylene glycol (PPG), and poly-alpha olefin (PAO) were used as the test lubricants. The ta-C film that was lubricated with TMP ester exhibited the ultralow friction coefficient of 0.015; however, the a-C:H film that was lubricated with TMP ester did not exhibit the ultralow friction. On the other hand, results obtained by a quartz-crystal microbalance with dissipation indicated that the adsorption properties of based oils depended on the type of sensor material (carbon or iron) and the type of based oil used in the measurements. Moreover, the frequency change of based oils increased with decreases in the average frictional coefficients of the steel-steel tribopair and the DLC-steel tribopair. Results of surface analysis indicated that TMP ester formed tribofilms on the ta-C surfaces, which exhibited high viscosity and low friction. All these results suggest that the combination of the ta-C film and TMP ester is the new ultra-low-friction and environmentally friendly sliding system.Hikaru OkuboSeiya WatanabeChiharu TadokoroShinya SasakiJapanese Society of Tribologistsarticlediamond-like carbontetrahedral amorphous carbonhydrogenated amorphous carbonester-based oilsquartz-crystal microbalance with dissipationultralow frictionPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 11, Iss 2, Pp 102-113 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	diamond-like carbon tetrahedral amorphous carbon hydrogenated amorphous carbon ester-based oils quartz-crystal microbalance with dissipation ultralow friction Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	diamond-like carbon tetrahedral amorphous carbon hydrogenated amorphous carbon ester-based oils quartz-crystal microbalance with dissipation ultralow friction Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Hikaru Okubo Seiya Watanabe Chiharu Tadokoro Shinya Sasaki Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil
description	The tribological properties of diamond-like carbon (DLC) films that were lubricated with an environmentally friendly ester-based oil were investigated. Sliding tests were performed on two types of DLC films, hydrogenated amorphous carbon (a-C:H) and tetrahedral amorphous carbon (ta-C) films, using a steel cylinder that was in contact with a steel disk coated with either a-C:H or ta-C under boundary lubrication. To compare the tribological properties of ester-based oils and other based oils, Trimethylolpropane (TMP) ester, polypropylene glycol (PPG), and poly-alpha olefin (PAO) were used as the test lubricants. The ta-C film that was lubricated with TMP ester exhibited the ultralow friction coefficient of 0.015; however, the a-C:H film that was lubricated with TMP ester did not exhibit the ultralow friction. On the other hand, results obtained by a quartz-crystal microbalance with dissipation indicated that the adsorption properties of based oils depended on the type of sensor material (carbon or iron) and the type of based oil used in the measurements. Moreover, the frequency change of based oils increased with decreases in the average frictional coefficients of the steel-steel tribopair and the DLC-steel tribopair. Results of surface analysis indicated that TMP ester formed tribofilms on the ta-C surfaces, which exhibited high viscosity and low friction. All these results suggest that the combination of the ta-C film and TMP ester is the new ultra-low-friction and environmentally friendly sliding system.
format	article
author	Hikaru Okubo Seiya Watanabe Chiharu Tadokoro Shinya Sasaki
author_facet	Hikaru Okubo Seiya Watanabe Chiharu Tadokoro Shinya Sasaki
author_sort	Hikaru Okubo
title	Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil
title_short	Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil
title_full	Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil
title_fullStr	Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil
title_full_unstemmed	Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil
title_sort	ultralow friction of a tetrahedral amorphous carbon film lubricated with an environmentally friendly ester-based oil
publisher	Japanese Society of Tribologists
publishDate	2016
url	https://doaj.org/article/e6fd9deabd604b93ad70ce6e8709018a
work_keys_str_mv	AT hikaruokubo ultralowfrictionofatetrahedralamorphouscarbonfilmlubricatedwithanenvironmentallyfriendlyesterbasedoil AT seiyawatanabe ultralowfrictionofatetrahedralamorphouscarbonfilmlubricatedwithanenvironmentallyfriendlyesterbasedoil AT chiharutadokoro ultralowfrictionofatetrahedralamorphouscarbonfilmlubricatedwithanenvironmentallyfriendlyesterbasedoil AT shinyasasaki ultralowfrictionofatetrahedralamorphouscarbonfilmlubricatedwithanenvironmentallyfriendlyesterbasedoil
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Ultralow Friction of a Tetrahedral Amorphous Carbon Film Lubricated with an Environmentally Friendly Ester-Based Oil

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