The Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP

One of the solutions to reduce friction between two sliding surfaces in automobile engine is by applying DLC coating to engine components. However, it is critical that the effect of lubricant additives to DLC coating to be clarified before hands as to avoid components failure. In this study, tribolo...

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Autores principales:	Mohd Taufik bin Taib, Noritsugu Umehara, Takayuki Tokoroyama, Motoyuki Murashima
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2018
Materias:	dlc a-c:h coating oil additives lubricants tribofilm uv irradiation 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/6d65eab7cd9745a08c2d1341aba72ee6
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spelling	oai:doaj.org-article:6d65eab7cd9745a08c2d1341aba72ee62021-11-05T09:19:16ZThe Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP1881-219810.2474/trol.13.119https://doaj.org/article/6d65eab7cd9745a08c2d1341aba72ee62018-07-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/13/3/13_119/_pdf/-char/enhttps://doaj.org/toc/1881-2198One of the solutions to reduce friction between two sliding surfaces in automobile engine is by applying DLC coating to engine components. However, it is critical that the effect of lubricant additives to DLC coating to be clarified before hands as to avoid components failure. In this study, tribological friction test between SUJ2 balls and as-deposited plus UV irradiated a-C:H coatings was conducted to clarify the effect of ultraviolet irradiation to DLC coating in four different additives added lubricant oils. AFM, nano-indentation hardness test, ellipsometery, Zygo, and EDS-SEM were used to investigate the effect of UV irradiation to a-C:H DLC before and after friction test. Prior the friction test, the results showed that UV irradiation presented no significant change in terms of hardness and roughness but the irradiation did penetrate into topmost surface of the a-C:H coating to several degree and created dangling bonds available to interact with lubricant additives elements. Friction test results showed that UV irradiated a-C:H coatings presented lower friction coefficient than as deposited a-C:H coatings. Worn surface analysis revealed that UV irradiated a-C:H coatings attracted more lubricant additives element to attach on its surface thus created thicker tribofilm on its own surface and its counter materials, resulted in lower friction coefficient than the as-deposited a-C:H coatings.Mohd Taufik bin TaibNoritsugu UmeharaTakayuki TokoroyamaMotoyuki MurashimaJapanese Society of Tribologistsarticledlca-c:h coatingoil additiveslubricantstribofilmuv irradiationPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 13, Iss 3, Pp 119-130 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	dlc a-c:h coating oil additives lubricants tribofilm uv irradiation Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	dlc a-c:h coating oil additives lubricants tribofilm uv irradiation Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Mohd Taufik bin Taib Noritsugu Umehara Takayuki Tokoroyama Motoyuki Murashima The Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP
description	One of the solutions to reduce friction between two sliding surfaces in automobile engine is by applying DLC coating to engine components. However, it is critical that the effect of lubricant additives to DLC coating to be clarified before hands as to avoid components failure. In this study, tribological friction test between SUJ2 balls and as-deposited plus UV irradiated a-C:H coatings was conducted to clarify the effect of ultraviolet irradiation to DLC coating in four different additives added lubricant oils. AFM, nano-indentation hardness test, ellipsometery, Zygo, and EDS-SEM were used to investigate the effect of UV irradiation to a-C:H DLC before and after friction test. Prior the friction test, the results showed that UV irradiation presented no significant change in terms of hardness and roughness but the irradiation did penetrate into topmost surface of the a-C:H coating to several degree and created dangling bonds available to interact with lubricant additives elements. Friction test results showed that UV irradiated a-C:H coatings presented lower friction coefficient than as deposited a-C:H coatings. Worn surface analysis revealed that UV irradiated a-C:H coatings attracted more lubricant additives element to attach on its surface thus created thicker tribofilm on its own surface and its counter materials, resulted in lower friction coefficient than the as-deposited a-C:H coatings.
format	article
author	Mohd Taufik bin Taib Noritsugu Umehara Takayuki Tokoroyama Motoyuki Murashima
author_facet	Mohd Taufik bin Taib Noritsugu Umehara Takayuki Tokoroyama Motoyuki Murashima
author_sort	Mohd Taufik bin Taib
title	The Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP
title_short	The Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP
title_full	The Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP
title_fullStr	The Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP
title_full_unstemmed	The Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP
title_sort	effect of uv irradiation to a-c:h on friction and wear properties under pao oil lubrication including modtc and zndtp
publisher	Japanese Society of Tribologists
publishDate	2018
url	https://doaj.org/article/6d65eab7cd9745a08c2d1341aba72ee6
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The Effect of UV Irradiation to a-C:H on Friction and Wear Properties under PAO Oil Lubrication Including MoDTC and ZnDTP

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