Production and Characterisation of Metastable ZrO2-Al2O3 Coatings Obtained by APS + Quench

摘要

Producing nanostructured materials through metastable phasesis an interesting novel route in the field of ceramic materials.Due to their small grain size and uniform structure, thesenanostructured bulk materials exhibit very interestingproperties. Metastable coatings can be produced starting frommicrostructured powders through atmospheric plasma spray(APS) technique, followed by a quenching route. The initialpowders are melted during the spraying and deposited over asubstrate that is quenched with liquid nitrogen (LIN) feeders,producing metastable coatings. The thermal sprayed coatingshave been characterized using XRD, SEM, FESEM and EDSin the Thermal Spray Centre (CPT) of the University ofBarcelona. The properties of such coatings have been alsostudied obtaining promising results.