Table of Contents
ISRN Ceramics
Volume 2012, Article ID 585892, 13 pages
Research Article

A Study of Parameters Affecting Wear Resistance of Alumina and Yttria Stabilized Zirconia Composite Coatings on Al-6061 Substrate

1Department of Mechanical Engineering, CMR Institute of Technology, Bangalore 560037, India
2Department of Mechanical Engineering, Alva’s Institute of Engineering & Technology, Moodbidri, Karnataka 574225, India
3Department of Mechanical Engineering, P.E.S. College of Engineering, Mandya, Karnataka 571401, India

Received 15 November 2012; Accepted 5 December 2012

Academic Editors: S. Bernik, S. Gutzov, A. Ravaglioli, and S. Shannigrahi

Copyright © 2012 N. Krishnamurthy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this investigation, a composite coating of alumina and yttria stabilized zirconia in equal proportion was developed on Al-6061 substrate using Atmospheric Plasma Spraying technique. Two commercially available powders of chemical composition Al 25Fe7Cr5Ni and Al2O330(Ni 20Al) were used as bond coats. The coating samples were subjected to abrasive wear test as per ASTM G99. From the results it was found that wear rate and coefficient of friction depend on various parameters such as microstructure, surface roughness, porosity, coating thickness, and hardness. It was also found that the mechanism of wear is mainly due to abrasion and once the bond coat is exposed to the disc, it loses material by adhesion. As the coating systems possess α-Al2O3 and ZrO2, they can be used for wear and heat resistant applications such as cylinder liner of internal combustion engines.