Process of Boundary Film Formation from Fatty Acid Solution

Ultrathin-film interferometry was used to investigate the developing process of boundary films in a steel-on-silica contact lubricated by a solution of n-hexadecanoic acid dissolved in n-hexadecane. Immersion of the surfaces in the solution is not sufficient to initiate boundary film formation. Howe...

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Autores principales: Ken Nakano, Hugh A. Spikes
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Lenguaje:EN
Publicado: Japanese Society of Tribologists 2012
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Acceso en línea:https://doaj.org/article/352749015974413690073ff110886447
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spelling oai:doaj.org-article:352749015974413690073ff1108864472021-11-05T09:25:11ZProcess of Boundary Film Formation from Fatty Acid Solution1881-219810.2474/trol.7.1https://doaj.org/article/352749015974413690073ff1108864472012-01-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/7/1/7_1_1/_pdf/-char/enhttps://doaj.org/toc/1881-2198Ultrathin-film interferometry was used to investigate the developing process of boundary films in a steel-on-silica contact lubricated by a solution of n-hexadecanoic acid dissolved in n-hexadecane. Immersion of the surfaces in the solution is not sufficient to initiate boundary film formation. However, upon a nominally pure rolling contact, boundary film formation is initiated, and, once initiated, the boundary film develops spontaneously. It is believed that the initial monolayer film adsorbed strongly on the solid surface induces subsequent molecular stacking from the solution. The developed boundary film can be partially destroyed by the rolling contact, although the nominally identical rolling contact acts as the trigger of boundary film formation. These findings reveal that the immobile boundary films to reduce friction of solids under high pressure result from the equilibrium of two competing processes: spontaneous development by molecular stacking and mechanical destruction by relative motion of the contact surfaces.Ken NakanoHugh A. SpikesJapanese Society of Tribologistsarticleboundary lubricationboundary filmtribofilm formationoptical interferometryPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 7, Iss 1, Pp 1-7 (2012)
institution DOAJ
collection DOAJ
language EN
topic boundary lubrication
boundary film
tribofilm formation
optical interferometry
Physics
QC1-999
Engineering (General). Civil engineering (General)
TA1-2040
Mechanical engineering and machinery
TJ1-1570
Chemistry
QD1-999
spellingShingle boundary lubrication
boundary film
tribofilm formation
optical interferometry
Physics
QC1-999
Engineering (General). Civil engineering (General)
TA1-2040
Mechanical engineering and machinery
TJ1-1570
Chemistry
QD1-999
Ken Nakano
Hugh A. Spikes
Process of Boundary Film Formation from Fatty Acid Solution
description Ultrathin-film interferometry was used to investigate the developing process of boundary films in a steel-on-silica contact lubricated by a solution of n-hexadecanoic acid dissolved in n-hexadecane. Immersion of the surfaces in the solution is not sufficient to initiate boundary film formation. However, upon a nominally pure rolling contact, boundary film formation is initiated, and, once initiated, the boundary film develops spontaneously. It is believed that the initial monolayer film adsorbed strongly on the solid surface induces subsequent molecular stacking from the solution. The developed boundary film can be partially destroyed by the rolling contact, although the nominally identical rolling contact acts as the trigger of boundary film formation. These findings reveal that the immobile boundary films to reduce friction of solids under high pressure result from the equilibrium of two competing processes: spontaneous development by molecular stacking and mechanical destruction by relative motion of the contact surfaces.
format article
author Ken Nakano
Hugh A. Spikes
author_facet Ken Nakano
Hugh A. Spikes
author_sort Ken Nakano
title Process of Boundary Film Formation from Fatty Acid Solution
title_short Process of Boundary Film Formation from Fatty Acid Solution
title_full Process of Boundary Film Formation from Fatty Acid Solution
title_fullStr Process of Boundary Film Formation from Fatty Acid Solution
title_full_unstemmed Process of Boundary Film Formation from Fatty Acid Solution
title_sort process of boundary film formation from fatty acid solution
publisher Japanese Society of Tribologists
publishDate 2012
url https://doaj.org/article/352749015974413690073ff110886447
work_keys_str_mv AT kennakano processofboundaryfilmformationfromfattyacidsolution
AT hughaspikes processofboundaryfilmformationfromfattyacidsolution
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