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research-article

Facile Synthesis of Uniform Calcite Micro-Cubes and their Enhanced Tribological Performance in Lithium-based Commercial Grease

[+] Author and Article Information
Khalida Akhtar

NCE physical Chemistry university of Peshawar Peshawar, KPK 25120 Pakistan khalida_akhtar@yahoo.com

Abid Hussain

NCE physical Chemistry university of Peshawar Peshawar, KPK 25120 Pakistan abidturi@hotmail.com

Muhammad Gul

NCE in Physical Chemistry Peshawar, KPK 25120 Pakistan mg46asim@gmail.com

Hina Khalid

NCE physical Chemistry university of Peshawar Peshawar, KPK 2 Pakistan hinakhd@yahoo.com

Saniya

NCE in Physical Chemistry Peshawar, KPK 25120 Pakistan yousafzaaai2468@gmail.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received October 1, 2018; final manuscript received January 24, 2019; published online xx xx, xxxx. Assoc. Editor: Min Zou.

ASME doi:10.1115/1.4042677 History: Received October 01, 2018; Accepted January 25, 2019

Abstract

This study describes a facile synthesis of monodispersed fine particles of calcium carbonate from an abundant indigenous and economical source (quick lime) and its enhanced tribological performance as a green additive in commercial Lithium Grease (CLG). The effect of various experimental parameters on particle morphology was thoroughly examined and the conditions were optimized. The synthesized uniform particles were characterized by SEM, FT-IR, XRD and TG/DTA and their results confirmed the calcite structure of the synthesized particles. The friction and wear studies were carried out under the applied load of 0.863 N at an ambient temperature for 5 min. The tribological performance of various amounts (1-7%) of cubic-CaCO3 (CCC) particles in CLG showed that 5 wt.% of CCC was the optimum concentration as additive in the present case. For comparison purpose, commercial CaCO3 powder was used under the same conditions. Decrease in friction coefficient of the CLG was observed to be 33.4% and 16.4% for 5 wt.% CCC and commercial CaCO3 additives, respectively. The significantly enhanced anti-wear and anti-friction performance of the optimum CCC-CLG in comparison to the blank and commercial-CaCO3-additized CLG suggested that the CCC-CLG blend can be used as an economical, green and high-performance lubricant in the mechanical components.

Copyright © 2019 by ASME
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