EconPapers    
Economics at your fingertips  
 

EXPERIMENTAL STUDY ON STEADY DYNAMIC FRICTION OF MWCNTs MIXED LUBRICANTS

Shraddha Gondane, Arun K. Singh (), Nitish Sinha and R. P. Vijayakumar
Additional contact information
Shraddha Gondane: Department of Mechanical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440010, India
Arun K. Singh: Department of Mechanical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440010, India
Nitish Sinha: #x2020;Department of Mechanical Engineering, G. H. Raisoni Institute of Engineering & Management, Jalgaon 425002, India
R. P. Vijayakumar: #x2021;Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440010, India

Surface Review and Letters (SRL), 2020, vol. 27, issue 07, 1-8

Abstract: This paper investigates the steady sliding behavior of multiwalled carbon nanotubes (MWCNTs) mixed lubricants at the metal–metal interface in direct shear tests. Slide-free-slide (SFS) experiments were performed to understand dynamic frictional stress of the sliding surfaces above the critical velocity. The experimental observations show that the dynamic stress decreases with increase in sliding velocity, but the same increases with normal stress. Further, in the case of change in concentration of the MWCNTs in the lubricant, the dynamic stress increases initially and then decreases to a minimum value and then further increases with addition of more nanoparticles in the lubricant. Dynamic stress and corresponding critical velocity are found to be minimum about 1.6% (wt./vol.) of MWCNTs concentration. Magnitude of cohesion as well as the coefficient of friction were also determined experimentally with the Coulomb friction law. The friction results are discussed in terms of the scaling laws in three regimes, namely viscous, rolling and sliding. These laws are justified on the basis of the mixed lubrication regime of Stribeck curve. Surface morphology of the test specimens before and after the experiment was also examined using SEM and EDS tests. No evidence of surface damage owing to motion of the nanoparticles was observed.

Keywords: MWCNTs; nanolubricant; normal stress; steady frictional stress; slide-free-slide (SFS) test; slide-hold-slide (SHS) test (search for similar items in EconPapers)
Date: 2020
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X19501725
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:27:y:2020:i:07:n:s0218625x19501725

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X19501725

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().

 
Page updated 2025-03-20
Handle: RePEc:wsi:srlxxx:v:27:y:2020:i:07:n:s0218625x19501725