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...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Japanese Society of Tribologists
2019-11-01
|
| Series: | Tribology Online |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/trol/14/4/14_220/_pdf/-char/en |
| _version_ | 1818824076380078080 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-18T23:50:07Z |
| format | Article |
| id | doaj.art-0f0d1fb5b4cb40b399c9a431a61d59b6 |
| institution | Directory Open Access Journal |
| issn | 1881-2198 |
| language | English |
| last_indexed | 2024-12-18T23:50:07Z |
| publishDate | 2019-11-01 |
| publisher | Japanese Society of Tribologists |
| record_format | Article |
| series | Tribology Online |
| spelling | doaj.art-0f0d1fb5b4cb40b399c9a431a61d59b62022-12-21T20:46:59ZengJapanese Society of TribologistsTribology Online1881-21982019-11-0114422022510.2474/trol.14.220trolKinetic Study on Lubricity of MoDTC as a Friction ModifierMasanori Komaba0Shinya Kondo1Atsushi Suzuki2Kazue Kurihara3Shigeyuki Mori4Research & Development Dept., KYODOYUSHI CO., LTD.Technical Headquarters, KYODOYUSHI CO., LTD.Material Engineering Department Engineering Division, AISIN AW CO., LTD.New Industry Creation Hatchery Center, Tohoku UniversityIwate UniversityThe 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.https://www.jstage.jst.go.jp/article/trol/14/4/14_220/_pdf/-char/enmolybudenum dithiocarbamatemolybdenum disulfidetribochemistryfriction coefficienttribofilmx-ray photoelectron spectroscopytemperature dependencekinetics |
| spellingShingle | Masanori Komaba Shinya Kondo Atsushi Suzuki Kazue Kurihara Shigeyuki Mori Kinetic Study on Lubricity of MoDTC as a Friction Modifier Tribology Online molybudenum dithiocarbamate molybdenum disulfide tribochemistry friction coefficient tribofilm x-ray photoelectron spectroscopy temperature dependence kinetics |
| title | 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_short | Kinetic Study on Lubricity of MoDTC as a Friction Modifier |
| title_sort | kinetic study on lubricity of modtc as a friction modifier |
| topic | molybudenum dithiocarbamate molybdenum disulfide tribochemistry friction coefficient tribofilm x-ray photoelectron spectroscopy temperature dependence kinetics |
| url | https://www.jstage.jst.go.jp/article/trol/14/4/14_220/_pdf/-char/en |
| work_keys_str_mv | AT masanorikomaba kineticstudyonlubricityofmodtcasafrictionmodifier AT shinyakondo kineticstudyonlubricityofmodtcasafrictionmodifier AT atsushisuzuki kineticstudyonlubricityofmodtcasafrictionmodifier AT kazuekurihara kineticstudyonlubricityofmodtcasafrictionmodifier AT shigeyukimori kineticstudyonlubricityofmodtcasafrictionmodifier |