MICROSTRUCTURAL CHARACTERIZATION OF CERAMIC COATINGS FOR HIGHTEMPERATURE APPLICATION

Abstract

Ceramic coatings are used in high-temperature applications, focusing on their behaviour under thermal stress and their ability to resist oxidation. The aim is to understand how these coatings can prevent cracks caused by oxidation on the thermally grown oxide (TGO) layer. Tests were conducted on ceramic-coated samples exposed to cycles of high temperatures (600°C) and subsequent cooling. The duration of pre-oxidation was varied, and two types of samples single ceramic layer and double ceramic layer TBC were used. The research aims to identify the time it takes for oxidation to occur after applying ceramic coatings and evaluate whether double-layer coatings offer superior protection against oxidation compared to single-layer coatings. The outcomes ofthis study will contribute to the development of ceramic coatings with enhancedresistance to oxidation, particularly in high-temperature environments. The findings provide insights into the factors influencing TGO layer thickness and contribute to the prevention of cracks caused by oxidation. This research holds practical implications for industries relying on high-temperature applications. It establishes a foundation for further advancements in ceramic coatings, intending to improve material performance and extend the lifespan of components operating in extreme conditions.