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research-article

Influence of MoS2, H3BO3 and MWCNT Additives on the Dry and Lubricated Sliding Tribology of AMMC-Steel Contacts

[+] Author and Article Information
Harpreet Singh

Mechanical Engineering Department, Thapar University, Patiala, Punjab, India-147004
harpreetsingh6n2016@gmail.com

ParamPreet Singh

Mechanical Engineering Department, Thapar University, Patiala, Punjab, India-147004
psingh.param@gmail.com

Hiralal Bhowmick

Mechanical Engineering Department, Thapar University, Patiala, Punjab, India-147004
hiralal.bhowmick@thapar.edu

1Corresponding author.

ASME doi:10.1115/1.4038957 History: Received August 14, 2017; Revised November 10, 2017

Abstract

The present study is focused on the performance evaluation of MoS2, H3BO3 and MWCNT used as the potential oil additives in base oil for aluminium metal matrix composites (AMMC)-steel (EN31) tribo contact. Al-B4C composite is used for this purpose based on a set of preliminary investigation under unlubricated and fresh oil lubrication using three different types of AMMCs (Al-SiC, Al-B4C and Al-SiC-B4C) were used. A pin-on-disc tribometer is used for all the friction and wear tests under operating condition of load 9.8 N and sliding velocity of 0.5 m/s. From the particle based wet tribology, it is clear that both the additives H3BO3 and MWCNT improve the friction as well as wear behavior for selected composite contacts. MWCNT emerged out as superior amongst all the additives, whereas MoS2 additives shows marginal enhancement in frictional performance under given operating conditions. Fractography and morphological study of pin specimens are carried out to identify the underlying friction and wear mechanisms.

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