The Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy

To clarify the low friction mechanism of CNx coating in PAO oil lubrication, we measured reflectance spectrum at friction area in-situ by reflectance spectroscopy during friction test against a sapphire hemisphere pin in PAO oil. We observed and estimated the thickness of PAO oil film, the surface r...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Tatsuya Okamoto, Noritsugu Umehara, Motoyuki Murashima, Koji Saito, Kazuyoshi Manabe, Keiji Hayashi
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2021
Materias:	cnx carbon nitride base oil oil lubrication reflectance spectroscopy in-situ observation friction mechanism lubrication mode 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/4d6056ec9edf43af9403342c0a04c22b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:4d6056ec9edf43af9403342c0a04c22b
record_format	dspace
spelling	oai:doaj.org-article:4d6056ec9edf43af9403342c0a04c22b2021-11-05T09:30:56ZThe Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy1881-219810.2474/trol.16.49https://doaj.org/article/4d6056ec9edf43af9403342c0a04c22b2021-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/16/1/16_49/_pdf/-char/enhttps://doaj.org/toc/1881-2198To clarify the low friction mechanism of CNx coating in PAO oil lubrication, we measured reflectance spectrum at friction area in-situ by reflectance spectroscopy during friction test against a sapphire hemisphere pin in PAO oil. We observed and estimated the thickness of PAO oil film, the surface roughness of CNx coating, thicknesses, and polarizability of the transformed layer formed on bulk CNx coating during friction test by analyzing reflectance spectrum. We proposed that the decreasing of load ratio of boundary lubrication mode to total load is the one of governing factor to reduce friction on the basis of the increasing of Λ value. Also we proposed the increasing of adsorption of PAO oil to the CNx transformed layer is the second governing factor on the basis of the increasing of polarizability of PAO oil and transformed layer, that leads to the increasing of van der Waals force between transformed layer and PAO oil as low friction mechanism of CNx in PAO oil lubrication.Tatsuya OkamotoNoritsugu UmeharaMotoyuki MurashimaKoji SaitoKazuyoshi ManabeKeiji HayashiJapanese Society of Tribologistsarticlecnxcarbon nitridebase oiloil lubricationreflectance spectroscopyin-situ observationfriction mechanismlubrication modePhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 16, Iss 1, Pp 49-58 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cnx carbon nitride base oil oil lubrication reflectance spectroscopy in-situ observation friction mechanism lubrication mode Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	cnx carbon nitride base oil oil lubrication reflectance spectroscopy in-situ observation friction mechanism lubrication mode Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Tatsuya Okamoto Noritsugu Umehara Motoyuki Murashima Koji Saito Kazuyoshi Manabe Keiji Hayashi The Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy
description	To clarify the low friction mechanism of CNx coating in PAO oil lubrication, we measured reflectance spectrum at friction area in-situ by reflectance spectroscopy during friction test against a sapphire hemisphere pin in PAO oil. We observed and estimated the thickness of PAO oil film, the surface roughness of CNx coating, thicknesses, and polarizability of the transformed layer formed on bulk CNx coating during friction test by analyzing reflectance spectrum. We proposed that the decreasing of load ratio of boundary lubrication mode to total load is the one of governing factor to reduce friction on the basis of the increasing of Λ value. Also we proposed the increasing of adsorption of PAO oil to the CNx transformed layer is the second governing factor on the basis of the increasing of polarizability of PAO oil and transformed layer, that leads to the increasing of van der Waals force between transformed layer and PAO oil as low friction mechanism of CNx in PAO oil lubrication.
format	article
author	Tatsuya Okamoto Noritsugu Umehara Motoyuki Murashima Koji Saito Kazuyoshi Manabe Keiji Hayashi
author_facet	Tatsuya Okamoto Noritsugu Umehara Motoyuki Murashima Koji Saito Kazuyoshi Manabe Keiji Hayashi
author_sort	Tatsuya Okamoto
title	The Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy
title_short	The Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy
title_full	The Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy
title_fullStr	The Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy
title_full_unstemmed	The Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy
title_sort	clarification of friction mechanism in oil lubrication for cnx coating by in-situ observation of friction area with reflectance spectroscopy
publisher	Japanese Society of Tribologists
publishDate	2021
url	https://doaj.org/article/4d6056ec9edf43af9403342c0a04c22b
work_keys_str_mv	AT tatsuyaokamoto theclarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT noritsuguumehara theclarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT motoyukimurashima theclarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT kojisaito theclarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT kazuyoshimanabe theclarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT keijihayashi theclarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT tatsuyaokamoto clarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT noritsuguumehara clarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT motoyukimurashima clarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT kojisaito clarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT kazuyoshimanabe clarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy AT keijihayashi clarificationoffrictionmechanisminoillubricationforcnxcoatingbyinsituobservationoffrictionareawithreflectancespectroscopy
_version_	1718444287005294592

The Clarification of Friction Mechanism in Oil Lubrication for CNx Coating by In-Situ Observation of Friction Area with Reflectance Spectroscopy

Ejemplares similares