Title: A comparative study of tribological and mechanical properties of composite polymer coatings on bearing steel

Authors: Anand Singh Rathaur; Jitendra Kumar Katiyar; Vinay Kumar Patel; Shubrajit Bhaumik; Anuj Kumar Sharma

Addresses: Department of Mechanical Engineering, G.B. Pant Institute of Engineering and Technology, Ghurdauri, Pauri, Garhwal, Uttarakhand 246194, India ' Tribology and Surface Interaction Laboratory, Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu-603203, India ' Department of Mechanical Engineering, G.B. Pant Institute of Engineering and Technology, Ghurdauri, Pauri, Garhwal, Uttarakhand 246194, India ' Tribology and Surface Interaction Laboratory, Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu-603203, India ' Centre for Advanced Studies, Dr. APJ Abdul Kalam Technical University, Lucknow-226031, India

Abstract: In this study, epoxy and SU-8 resin along with its composites was coated over bearing steel. The graphite, talc and base oil were used to fabricate the composites using spin-coater. The tribological and surface characterisation tests were performed on both type of polymer and its composite using ball-on-disk setup, optical microscope, 3D optical profilometer, and goniometer, respectively. From the results, it can be seen that epoxy and its composites polymer showed lower coefficient of friction (~0.16), high wear resistance properties (> 10² times), improvement in mechanical properties (elastic modulus and hardness) (~3-4 times) and better hydrophobic nature as compared to SU-8 polymer (~34%) and its composites. Furthermore, a neural network model was developed to determine the influential parameters on specific wear rate and coefficient of friction.

Keywords: epoxy; SU-8; bearing steel; neural network; composite coating.

DOI: 10.1504/IJSURFSE.2018.096744

International Journal of Surface Science and Engineering, 2018 Vol.12 No.5/6, pp.379 - 401

Received: 16 Feb 2018
Accepted: 20 Mar 2018
Published online: 10 Dec 2018 *

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