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The temperature of a friction pair exerts considerable influence on the tribological behavior of a system. In two cases, one with and the other without Cu (copper) nanoparticles, the temperature increase in friction pairs caused by frictional heating and its tribological properties at various temperatures are studied by using the molecular dynamics approach. The results show that temperature distribution and surface abrasion are significantly improved by the presence of Cu nanoparticles. This is one of the reasons for the improvements in tribological properties achieved in the presence of nanoparticles. The temperature and range of influence of frictional heating for the model without nanoparticles are significantly increased with the increase in the sliding velocity; however, in the model with nanoparticles, the temperature gradient is confined to the area near the Cu film. With an increase in the temperature of the friction pair, the improvement in anti-wear properties associated with the presence of Cu nanoparticles becomes more significant.


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Molecular dynamics simulation of effects of nanoparticles on frictional heating and tribological properties at various temperatures

Show Author's information Chengzhi HUJizu LV( )Minli BAIXiaoliang ZHANGDawei TANG
Laboratory of Ocean Energy Utilization of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Abstract

The temperature of a friction pair exerts considerable influence on the tribological behavior of a system. In two cases, one with and the other without Cu (copper) nanoparticles, the temperature increase in friction pairs caused by frictional heating and its tribological properties at various temperatures are studied by using the molecular dynamics approach. The results show that temperature distribution and surface abrasion are significantly improved by the presence of Cu nanoparticles. This is one of the reasons for the improvements in tribological properties achieved in the presence of nanoparticles. The temperature and range of influence of frictional heating for the model without nanoparticles are significantly increased with the increase in the sliding velocity; however, in the model with nanoparticles, the temperature gradient is confined to the area near the Cu film. With an increase in the temperature of the friction pair, the improvement in anti-wear properties associated with the presence of Cu nanoparticles becomes more significant.

Keywords: temperature, nanoparticles, tribological properties, molecular dynamics

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Publication history

Received: 03 September 2018
Revised: 07 December 2018
Accepted: 29 December 2018
Published: 08 April 2019
Issue date: June 2020

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© The author(s) 2019

Acknowledgements

This work is supported by National Natural Science Foundation of China (Grant No. 51806028, 51876027, 51476019, and 51376002) and the Fundamental Research Funds for the Central Universities (DUT17RC(3)043 and DUT 17JC23).

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