Characteristics of Thermally Sprayed Alumina-Titania Ceramic Coatings obtained from Conventional and Nanostructured Powders - A Review

ABSTRACT

Alumina-titania thick coatings with finely layered microstructure are usually deposited using Air Plasma Spraying (APS) process. In the APS process, nitrogen or argon is used as the primary plasma gas. Microstructural characteristics of alumina-titania coatings are typically affected by the percentage of Titania (TiO₂) present in the coatings. On the other hand, coatings obtained from nanostructured agglomerated alumina-titania powders have shown superior wear resistance over the corresponding conventional coatings. The properties of conventional Alumina-Titania coatings can also be modified by reinforcing them with some fillers like graphene, Carbon Nanotubes (CNTs), etc. From the past decade, significant research work has been in progress both industrial and academia side and still there is a lot of scope for future research on this process. This detailed review gives an overall view of Alumina-Titania coatings including their significance, microstructural, mechanical, wear, corrosion behavior and the effect of various reinforcements on their characteristics.

KEYWORDS:

• Alumina-Titania coatings
• nanostructured powder
• microstructure
• wear characterstics
• reinforcements

Data Availability Statement

Data sharing is not applicable to this article as no new data were created or analyzed in this study.

Disclosure statement

No potential conflict of interest was reported by the author.

Additional information

Notes on contributors

Mohammed Thalib Basha G

Mohammed Thalib Basha G currently working as a Research Scholar, pursuing his Ph.D. from the School of Mechanical Engineering, Vellore Institute of Technology (VIT), Vellore, Tamilnadu, India.  His area of research is on „Microstructural and Tribological Characterization of Ceramic Coatings „.  He completed his post-graduation from C. Abdul Hakeem College of Engg and Tech, affiliated with Anna University, Chennai. He got University Rank 01 in his Post-graduation during 2015-2016. He has research and teaching experience of 4 years in VIT, Vellore.

Venkateshwarlu Bolleddu

Venkateshwarlu Bolleddu currently working as an Associate Professor (Sr) in the School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamilnadu, India. He completed his Ph.D.  from the Department of Mechanical Engineering, IIT Kharagpur, West Bengal, India. He has teaching and research experience of 11 years. He completed research projects worth 35 Lakhs and submitted project proposals worth more than 3.5 crores to various funding agencies like DST, ISRO, etc. He is also working as a reviewer for many reputed International Journals.