Title: Tribological behaviour of thermally sprayed nano zirconia coating on AA7075

Authors: S. Lakshmi Sankar; B. Ramesh; J.V. Sai Prasanna Kumar; K. Narayanamoorthy; Kuldeep K. Saxena; K. Arun; Praveen Kumar Balguri; T. Vishnu Vardhan; P. Mathiyalagan

Addresses: Department of Mechanical Engineering, Sathyabama Institute of Science and Technology, Chennai – 600119, Tamil Nadu, India ' Department of Mechanical Engineering, J.J. College of Engineering and Technology, Tiruchirappalli – 620009, Tamil Nadu, India ' Department of Aeronautical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai – 600062, Tamil Nadu, India ' Department of Mechanical Engineering, St. Joseph's Institute of Technology, Chennai – 600119, Tamil Nadu, India ' Division of Research and Development, Lovely Professional University, Phagwara – 144411, India ' Department of Mechanical Engineering, St. Joseph's College of Engineering, Chennai – 600119, Tamil Nadu, India ' Division of Aeronautical Engineering, Institute of Aeronautical Engineering, Hyderabad – 500043, India ' Department of Mechanical Engineering, Sri Venkateswara Institute of Technology, Ananthapuramu – 515001, Andhra Pradesh, India ' Department of Mechanical Engineering, J.J. College of Engineering and Technology, Tiruchirappalli – 620009, Tamil Nadu, India

Abstract: Frictional force can be overcome by coating process. The study about the performance of zirconium coating on aluminium alloys is very less. Further, the performance of nano zirconia as reinforcement in the coating and aluminium alloys has only been studied. The novelty of this research work lies in the investigation of the effect of different size of nano zirconia particles on the tribological characteristics of high velocity oxygen fuel (HVOF) nano zirconia coated Aluminium Alloy 7075. The coated AA7075 specimens were subjected to dry wear test at room temperature using pin-on disc apparatus as per ASTM standard G99-05. It has been found that increase in the size of nano zirconia particles influences the wear rate and coefficient of friction to a greater extent. The AA7075 specimens coated with 35 nm size zirconia particles exhibited 44.18% reduction in the wear rate when compared to that of uncoated AA7075 specimens.

Keywords: nano; zirconia; thermal spray; coating; wear rate; aluminium alloy.

DOI: 10.1504/IJSURFSE.2024.142238

International Journal of Surface Science and Engineering, 2024 Vol.18 No.4, pp.333 - 348

Received: 13 Jan 2024
Accepted: 10 Apr 2024
Published online: 15 Oct 2024 *

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