7 - Processing, microstructures and properties of thermal barrier coatings (TBCs) by plasma spraying (PS)

Abstract

A review is given of the process, microstructure and properties of plasma-sprayed thermal barrier coatings (PS–TBCs). The chapter first summarizes the main process methods, parameters and model of PS– TBCs before introducing the basic microstructural characteristics – splat, porosity and microcrack – and main properties – modulus, bonding strength and thermal conductivity – of PS–TBCs. The chapter goes on to discuss the relationship between the microstructure and mechanical properties of PS–TBCs and plasma-spraying parameters. In conclusion, some likely future trends in the field of PS–TBCs are described.