Kinetic Study on Lubricity of MoDTC as a Friction Modifier

The temperature dependence of friction coefficient of lubricant oils containing MoDTC was evaluated using a ball on disk tribometer at constant temperatures of 25, 40, 60 and 80°C. In the experiments, the friction coefficient gradually decreased and tended to become lower at steady state. The decrea...

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Autores principales:	Masanori Komaba, Shinya Kondo, Atsushi Suzuki, Kazue Kurihara, Shigeyuki Mori
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2019
Materias:	molybudenum dithiocarbamate molybdenum disulfide tribochemistry friction coefficient tribofilm x-ray photoelectron spectroscopy temperature dependence kinetics 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/0f0d1fb5b4cb40b399c9a431a61d59b6
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spelling	oai:doaj.org-article:0f0d1fb5b4cb40b399c9a431a61d59b62021-11-05T09:17:37ZKinetic Study on Lubricity of MoDTC as a Friction Modifier1881-219810.2474/trol.14.220https://doaj.org/article/0f0d1fb5b4cb40b399c9a431a61d59b62019-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/14/4/14_220/_pdf/-char/enhttps://doaj.org/toc/1881-2198The temperature dependence of friction coefficient of lubricant oils containing MoDTC was evaluated using a ball on disk tribometer at constant temperatures of 25, 40, 60 and 80°C. In the experiments, the friction coefficient gradually decreased and tended to become lower at steady state. The decreasing slope of the friction coefficient was steeper and the lower friction coefficient at the steady state was obtained at a higher oil temperature. The friction coefficient was also controlled by the concentration of MoDTC in oil. Considering that the results of lubricating tests supported the successive processes involving production and wear of MoS2, the friction coefficient can be controlled by the coverage of MoS2 which is determined by a balance of formation and wear of MoS2. An analysis formula was established based on kinetic assessment of the process in order to obtain the Arrhenius plots of the test results. There were two regions which had different slopes in the plot. The activation energies were 70 and 4 kJ/mol for the low and the high temperature regions, respectively. This result suggested that MoS2 production from MoDTC was reaction rate-limiting at low temperature and transport ratelimiting at high temperature.Masanori KomabaShinya KondoAtsushi SuzukiKazue KuriharaShigeyuki MoriJapanese Society of Tribologistsarticlemolybudenum dithiocarbamatemolybdenum disulfidetribochemistryfriction coefficienttribofilmx-ray photoelectron spectroscopytemperature dependencekineticsPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 14, Iss 4, Pp 220-225 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	molybudenum dithiocarbamate molybdenum disulfide tribochemistry friction coefficient tribofilm x-ray photoelectron spectroscopy temperature dependence kinetics Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	molybudenum dithiocarbamate molybdenum disulfide tribochemistry friction coefficient tribofilm x-ray photoelectron spectroscopy temperature dependence kinetics Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Masanori Komaba Shinya Kondo Atsushi Suzuki Kazue Kurihara Shigeyuki Mori Kinetic Study on Lubricity of MoDTC as a Friction Modifier
description	The temperature dependence of friction coefficient of lubricant oils containing MoDTC was evaluated using a ball on disk tribometer at constant temperatures of 25, 40, 60 and 80°C. In the experiments, the friction coefficient gradually decreased and tended to become lower at steady state. The decreasing slope of the friction coefficient was steeper and the lower friction coefficient at the steady state was obtained at a higher oil temperature. The friction coefficient was also controlled by the concentration of MoDTC in oil. Considering that the results of lubricating tests supported the successive processes involving production and wear of MoS2, the friction coefficient can be controlled by the coverage of MoS2 which is determined by a balance of formation and wear of MoS2. An analysis formula was established based on kinetic assessment of the process in order to obtain the Arrhenius plots of the test results. There were two regions which had different slopes in the plot. The activation energies were 70 and 4 kJ/mol for the low and the high temperature regions, respectively. This result suggested that MoS2 production from MoDTC was reaction rate-limiting at low temperature and transport ratelimiting at high temperature.
format	article
author	Masanori Komaba Shinya Kondo Atsushi Suzuki Kazue Kurihara Shigeyuki Mori
author_facet	Masanori Komaba Shinya Kondo Atsushi Suzuki Kazue Kurihara Shigeyuki Mori
author_sort	Masanori Komaba
title	Kinetic Study on Lubricity of MoDTC as a Friction Modifier
title_short	Kinetic Study on Lubricity of MoDTC as a Friction Modifier
title_full	Kinetic Study on Lubricity of MoDTC as a Friction Modifier
title_fullStr	Kinetic Study on Lubricity of MoDTC as a Friction Modifier
title_full_unstemmed	Kinetic Study on Lubricity of MoDTC as a Friction Modifier
title_sort	kinetic study on lubricity of modtc as a friction modifier
publisher	Japanese Society of Tribologists
publishDate	2019
url	https://doaj.org/article/0f0d1fb5b4cb40b399c9a431a61d59b6
work_keys_str_mv	AT masanorikomaba kineticstudyonlubricityofmodtcasafrictionmodifier AT shinyakondo kineticstudyonlubricityofmodtcasafrictionmodifier AT atsushisuzuki kineticstudyonlubricityofmodtcasafrictionmodifier AT kazuekurihara kineticstudyonlubricityofmodtcasafrictionmodifier AT shigeyukimori kineticstudyonlubricityofmodtcasafrictionmodifier
_version_	1718444392160690176

Kinetic Study on Lubricity of MoDTC as a Friction Modifier

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