Breakdown Processes of Boundary Films Formed by Oiliness Additives

Breakdown processes of boundary films formed by lubricating oils containing oiliness additives were studied in a steel-mercury interface under quasi-static loading. Simultaneous measurements of the thickness and breakdown ratio of the films were carried out using an electrical impedance method. Diff...

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Autores principales:	Ken Nakano, Kazuyoshi Manabe
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2011
Materias:	boundary lubrication boundary film adsorption osmotic pressure electrical impedance method 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/63673ca1743d499cafe6678f52157667
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spelling	oai:doaj.org-article:63673ca1743d499cafe6678f521576672021-11-05T09:25:29ZBreakdown Processes of Boundary Films Formed by Oiliness Additives1881-219810.2474/trol.6.277https://doaj.org/article/63673ca1743d499cafe6678f521576672011-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/6/7/6_7_277/_pdf/-char/enhttps://doaj.org/toc/1881-2198Breakdown processes of boundary films formed by lubricating oils containing oiliness additives were studied in a steel-mercury interface under quasi-static loading. Simultaneous measurements of the thickness and breakdown ratio of the films were carried out using an electrical impedance method. Different breakdown processes were obtained for different lubricating oils. At a concentration of 10-3 mass%, the lubricating oils formed residual films with a thickness of a few tens of nanometers that support a normal load without any hydrodynamic effects. A possible mechanism for this is the osmotic pressure created by the concentration difference between the bulk oil and residual film. Friction coefficients of a steel-on-steel contact lubricated by the lubricating oils in a boundary lubrication regime were related to the breakdown processes in the steel-mercury interface using multiple regression analysis. Lubricating oils that showed low-rate breakdown processes showed low friction coefficients. This indicates that the breakdown rate of boundary films is an important factor in the mechanism of boundary lubrication.Ken NakanoKazuyoshi ManabeJapanese Society of Tribologistsarticleboundary lubricationboundary filmadsorptionosmotic pressureelectrical impedance methodPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 6, Iss 7, Pp 277-283 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	boundary lubrication boundary film adsorption osmotic pressure electrical impedance method Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	boundary lubrication boundary film adsorption osmotic pressure electrical impedance method Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Ken Nakano Kazuyoshi Manabe Breakdown Processes of Boundary Films Formed by Oiliness Additives
description	Breakdown processes of boundary films formed by lubricating oils containing oiliness additives were studied in a steel-mercury interface under quasi-static loading. Simultaneous measurements of the thickness and breakdown ratio of the films were carried out using an electrical impedance method. Different breakdown processes were obtained for different lubricating oils. At a concentration of 10-3 mass%, the lubricating oils formed residual films with a thickness of a few tens of nanometers that support a normal load without any hydrodynamic effects. A possible mechanism for this is the osmotic pressure created by the concentration difference between the bulk oil and residual film. Friction coefficients of a steel-on-steel contact lubricated by the lubricating oils in a boundary lubrication regime were related to the breakdown processes in the steel-mercury interface using multiple regression analysis. Lubricating oils that showed low-rate breakdown processes showed low friction coefficients. This indicates that the breakdown rate of boundary films is an important factor in the mechanism of boundary lubrication.
format	article
author	Ken Nakano Kazuyoshi Manabe
author_facet	Ken Nakano Kazuyoshi Manabe
author_sort	Ken Nakano
title	Breakdown Processes of Boundary Films Formed by Oiliness Additives
title_short	Breakdown Processes of Boundary Films Formed by Oiliness Additives
title_full	Breakdown Processes of Boundary Films Formed by Oiliness Additives
title_fullStr	Breakdown Processes of Boundary Films Formed by Oiliness Additives
title_full_unstemmed	Breakdown Processes of Boundary Films Formed by Oiliness Additives
title_sort	breakdown processes of boundary films formed by oiliness additives
publisher	Japanese Society of Tribologists
publishDate	2011
url	https://doaj.org/article/63673ca1743d499cafe6678f52157667
work_keys_str_mv	AT kennakano breakdownprocessesofboundaryfilmsformedbyoilinessadditives AT kazuyoshimanabe breakdownprocessesofboundaryfilmsformedbyoilinessadditives
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Breakdown Processes of Boundary Films Formed by Oiliness Additives

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