Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature

The objective of this study is to evaluate the boundary lubrication performance of ionic liquids under high vacuum and low temperature by taking the cosmic space environment into consideration, as a screening stage prior to evaluating lubrication performance in actual space mechanisms. The boundary...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Kenji Kobayashi, Akihito Suzuki, Yukitoshi Fujinami, Takashi Nogi, Shingo Obara, Masabumi Masuko
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2015
Materias:	ionic liquids space high vacuum low temperature viscosity-temperature characteristics wear 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/d19519c987a94967b8b8994b0ba7d4fa
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:d19519c987a94967b8b8994b0ba7d4fa
record_format	dspace
spelling	oai:doaj.org-article:d19519c987a94967b8b8994b0ba7d4fa2021-11-05T09:22:37ZLubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature1881-219810.2474/trol.10.138https://doaj.org/article/d19519c987a94967b8b8994b0ba7d4fa2015-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/10/2/10_138/_pdf/-char/enhttps://doaj.org/toc/1881-2198The objective of this study is to evaluate the boundary lubrication performance of ionic liquids under high vacuum and low temperature by taking the cosmic space environment into consideration, as a screening stage prior to evaluating lubrication performance in actual space mechanisms. The boundary lubrication performance of ionic liquids was evaluated at room temperature with a reciprocating linear motion tribometer, and at low temperature (from –80°C to room temperature) with a unidirectional rotation tribometer. Low-temperature rheometry was also carried out. Ionic liquids showed a supercooling state and crystallization. This crystallization was prevented by mixing different ionic liquids together. The equimolar mixture of 1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (EMI-TFSA), 1-butyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (BMI-TFSA), and 1-hexyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (HMI-TFSA) showed no crystallization in our experiment. The antiwear performance of this sample oil mixture was similar to that of MAC and much better than that of PFPE at low temperatures. This mixture prevented metal contact at –80°C, most likely due to its high viscosity and high adsorption of molecules.Kenji KobayashiAkihito SuzukiYukitoshi FujinamiTakashi NogiShingo ObaraMasabumi MasukoJapanese Society of Tribologistsarticleionic liquidsspacehigh vacuumlow temperatureviscosity-temperature characteristicswearboundary lubricationPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 10, Iss 2, Pp 138-146 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	ionic liquids space high vacuum low temperature viscosity-temperature characteristics wear boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	ionic liquids space high vacuum low temperature viscosity-temperature characteristics wear boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Kenji Kobayashi Akihito Suzuki Yukitoshi Fujinami Takashi Nogi Shingo Obara Masabumi Masuko Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature
description	The objective of this study is to evaluate the boundary lubrication performance of ionic liquids under high vacuum and low temperature by taking the cosmic space environment into consideration, as a screening stage prior to evaluating lubrication performance in actual space mechanisms. The boundary lubrication performance of ionic liquids was evaluated at room temperature with a reciprocating linear motion tribometer, and at low temperature (from –80°C to room temperature) with a unidirectional rotation tribometer. Low-temperature rheometry was also carried out. Ionic liquids showed a supercooling state and crystallization. This crystallization was prevented by mixing different ionic liquids together. The equimolar mixture of 1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (EMI-TFSA), 1-butyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (BMI-TFSA), and 1-hexyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (HMI-TFSA) showed no crystallization in our experiment. The antiwear performance of this sample oil mixture was similar to that of MAC and much better than that of PFPE at low temperatures. This mixture prevented metal contact at –80°C, most likely due to its high viscosity and high adsorption of molecules.
format	article
author	Kenji Kobayashi Akihito Suzuki Yukitoshi Fujinami Takashi Nogi Shingo Obara Masabumi Masuko
author_facet	Kenji Kobayashi Akihito Suzuki Yukitoshi Fujinami Takashi Nogi Shingo Obara Masabumi Masuko
author_sort	Kenji Kobayashi
title	Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature
title_short	Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature
title_full	Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature
title_fullStr	Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature
title_full_unstemmed	Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature
title_sort	lubrication performance of ionic liquids as lubricants for space mechanisms under high vacuum and low temperature
publisher	Japanese Society of Tribologists
publishDate	2015
url	https://doaj.org/article/d19519c987a94967b8b8994b0ba7d4fa
work_keys_str_mv	AT kenjikobayashi lubricationperformanceofionicliquidsaslubricantsforspacemechanismsunderhighvacuumandlowtemperature AT akihitosuzuki lubricationperformanceofionicliquidsaslubricantsforspacemechanismsunderhighvacuumandlowtemperature AT yukitoshifujinami lubricationperformanceofionicliquidsaslubricantsforspacemechanismsunderhighvacuumandlowtemperature AT takashinogi lubricationperformanceofionicliquidsaslubricantsforspacemechanismsunderhighvacuumandlowtemperature AT shingoobara lubricationperformanceofionicliquidsaslubricantsforspacemechanismsunderhighvacuumandlowtemperature AT masabumimasuko lubricationperformanceofionicliquidsaslubricantsforspacemechanismsunderhighvacuumandlowtemperature
_version_	1718444437735997440

Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature

Ejemplares similares