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Monday, May 14, 2007

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

S. Dosta, I. G. Cano, J. R. Miguel, J. M. Guilemany, Thermal Spray Center. University of Barcelona, Barcelona, Spain

Producing nanostructured materials through metastable phases is an interesting technique in the field of ceramic materials. Due to their small grain size and uniform structure, these nanostructured bulk materials exhibit very interesting properties. Metastable coatings can be produced starting from microstructured powders through Atmospheric Plasma Spray (APS) technique,  followed by a quenching route.

The initial powders are melted during the spraying and deposited over a substrate that is quenched with LIN feeders, producing metastable coatings.

The obtained coatings have been characterised using XRD, SEM, FESEM and EDS in the Thermal Spray Centre (CPT) of the University of Barcelona. The properties of such coatings have been also studied obtaining promising results.


Summary: Due to their small grain size and uniform structure, nanostructured materials exhibit very interesting properties. One way for obtaining this kind of materials is Atmospheric Plasma Spray (APS) technique, followed by a quenching route. The structure and properties of the coatings have been studied, obtaining promising results.