Clad nanostructured plasma densified alumina-titania powders were air plasma sprayed to produce dense and wear resistant ceramic coatings characterized by controlled amounts of nano or sub-micro structure. Operating parameters were optimized by a complete Design of Experiment procedure. Nanostructured coatings were proved to outperform conventional wear resistant ceramic deposits of similar composition, with a reduction of approximately 30% of the wear rate, an increase of 15% of hardness and 110% of elastic modulus, together with an improvement of up to 25% of fracture toughness in the tested conditions.
Wear resistant alumina-titania plasma sprayed coatings from nano-structured precursors / Bartuli, Cecilia; Marra, Francesco; Pulci, Giovanni; Valente, Teodoro. - STAMPA. - 22:(2009), pp. 255-263. (Intervento presentato al convegno Twenty Second International Conference on Surface Modification Technologies tenutosi a Trollhättan, Sweden nel September 22-24, 2008).
Wear resistant alumina-titania plasma sprayed coatings from nano-structured precursors
BARTULI, Cecilia;MARRA, FRANCESCO;PULCI, Giovanni;VALENTE, Teodoro
2009
Abstract
Clad nanostructured plasma densified alumina-titania powders were air plasma sprayed to produce dense and wear resistant ceramic coatings characterized by controlled amounts of nano or sub-micro structure. Operating parameters were optimized by a complete Design of Experiment procedure. Nanostructured coatings were proved to outperform conventional wear resistant ceramic deposits of similar composition, with a reduction of approximately 30% of the wear rate, an increase of 15% of hardness and 110% of elastic modulus, together with an improvement of up to 25% of fracture toughness in the tested conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
