In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication

In this study, the formation processes of molybdenum dithiocarbamate (MoDTC) and zinc diallyldithiophosphate (ZDDP) tribofilms were investigated using an in situ Raman-space layer imaging method (SLIM) tribometer under boundary lubrication. According to the results, the ratio of the POx and P-O-P bo...

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Autores principales:	Hikaru Okubo, Chiharu Tadokoro, Shinya Sasaki
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2020
Materias:	raman slim zddp modtc boundary lubrication 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/d6b5bf2b1a2944d18b2d60ec935877b5
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spelling	oai:doaj.org-article:d6b5bf2b1a2944d18b2d60ec935877b52021-11-05T09:10:33ZIn Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication1881-219810.2474/trol.15.105https://doaj.org/article/d6b5bf2b1a2944d18b2d60ec935877b52020-05-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/15/3/15_105/_pdf/-char/enhttps://doaj.org/toc/1881-2198In this study, the formation processes of molybdenum dithiocarbamate (MoDTC) and zinc diallyldithiophosphate (ZDDP) tribofilms were investigated using an in situ Raman-space layer imaging method (SLIM) tribometer under boundary lubrication. According to the results, the ratio of the POx and P-O-P bonds in the tribofilms was almost the same as the film thickness behavior calculated from the SLIM images. Hence, the the time-dependence chemical composition change of the tribofilms of phosphate related bonds in the tribofilms is considered a factor in the growth of ZDDP tribofilms. Moreover, the presence of MoDTC in the ZDDP solution contributed to the formation of phosphate compounds with a relatively high ratio of P-O-P links, such as ultra-phosphate glasses. This mechanism is attributable to the friction-reduction effects of MoS2 on the tribofilm, which can contribute to maintaining a suitable condition for the formation of relatively high P-O-P-link-ratio tribofilms.Hikaru OkuboChiharu TadokoroShinya SasakiJapanese Society of Tribologistsarticleramanslimzddpmodtcboundary lubricationPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 15, Iss 3, Pp 105-116 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	raman slim zddp modtc boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	raman slim zddp modtc boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Hikaru Okubo Chiharu Tadokoro Shinya Sasaki In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication
description	In this study, the formation processes of molybdenum dithiocarbamate (MoDTC) and zinc diallyldithiophosphate (ZDDP) tribofilms were investigated using an in situ Raman-space layer imaging method (SLIM) tribometer under boundary lubrication. According to the results, the ratio of the POx and P-O-P bonds in the tribofilms was almost the same as the film thickness behavior calculated from the SLIM images. Hence, the the time-dependence chemical composition change of the tribofilms of phosphate related bonds in the tribofilms is considered a factor in the growth of ZDDP tribofilms. Moreover, the presence of MoDTC in the ZDDP solution contributed to the formation of phosphate compounds with a relatively high ratio of P-O-P links, such as ultra-phosphate glasses. This mechanism is attributable to the friction-reduction effects of MoS2 on the tribofilm, which can contribute to maintaining a suitable condition for the formation of relatively high P-O-P-link-ratio tribofilms.
format	article
author	Hikaru Okubo Chiharu Tadokoro Shinya Sasaki
author_facet	Hikaru Okubo Chiharu Tadokoro Shinya Sasaki
author_sort	Hikaru Okubo
title	In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication
title_short	In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication
title_full	In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication
title_fullStr	In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication
title_full_unstemmed	In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication
title_sort	in situ raman-slim monitoring for the formation processes of modtc and zddp tribofilms at steel/steel contacts under boundary lubrication
publisher	Japanese Society of Tribologists
publishDate	2020
url	https://doaj.org/article/d6b5bf2b1a2944d18b2d60ec935877b5
work_keys_str_mv	AT hikaruokubo insituramanslimmonitoringfortheformationprocessesofmodtcandzddptribofilmsatsteelsteelcontactsunderboundarylubrication AT chiharutadokoro insituramanslimmonitoringfortheformationprocessesofmodtcandzddptribofilmsatsteelsteelcontactsunderboundarylubrication AT shinyasasaki insituramanslimmonitoringfortheformationprocessesofmodtcandzddptribofilmsatsteelsteelcontactsunderboundarylubrication
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In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication

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