ZrB₂-Based Coatings by Plasma Spraying: Behavior Under Oxidizing and Corrosive Atmospheres at Temperatures Exceeding 2000 °C

This work deals with ZrB₂-based coatings prepared by inert plasma spraying and their behavior under high heat flux in moist atmospheres. ZrB₂ coatings with different compositions and microstructures were produced and subjected to high-temperature oxidation testing in order to identify the most oxidation-resistant sample. It is shown that coating microstructure can significantly influence oxidation kinetics and that uniformly dispersed nanoscale additives are particularly effective for slowing oxidation.