Study on pin temperature and wear behaviour of plasma sprayed Ni-Cr coatings with nano Al₂O₃ particle

ABSTRACT

In this study, the dry sliding wear behaviour of plasma sprayed composite Ni-Cr coatings with nano Al₂O₃ particle concentrations of 0, 5, 10, 15, 20, and 100 wt.% on Al6061 substrate material was analysed. The coatings were characterised by scanning electron microscopy. The results showed higher porosity and coating thickness values for 100% and 20% nano Al₂O₃ particle coatings. The microhardness was found to increase with an increase in nano Al₂O₃ particle concentration in the Ni-Cr coating matrix. The porosity values were found to decrease with an increase in coating thickness. It is found that the specific wear rate of the Ni-Cr/15% Al₂O₃ particle coating is reduced by 54.02% compared to the Al₂O₃ particle coating.

KEYWORDS:

• Nano composite coating
• Ni-Cr/Al₂O₃
• plasma spray
• adhesive strength
• microhardness
• specific wear rate
• friction
• pin temperature

Acknowledgement

The authors thank the College of Technical Education Karnataka Government, Karnataka, India for support.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Declaration

This work has not been submitted or is under consideration elsewhere for publication. The authors declare acceptance of the publisher ethics code and consent for publication.

All the authors agree to publication.

Authors' contributions

Dr. C.R. Raghavendra  – Conduction and plan of Experimentation. Dr. K.P. Jhansilakshmi  – Draft preparation and corrections.