Rare-earth zirconates are potential materials for thermal bather coatings. Their properties are not still well known, due to any lacks in processing and characterization techniques. To this purpose lanthanum zirconate coatings were herein manufactured by plasma spraying. The coatings exhibited high porosity, due to the presence of pores, splat boundaries and microcracks. The high-temperature evolution of mechanical properties was investigated by arranging specific bending tests up to 1500 degrees C using SiC testing assembly which allows to reconstruct and measure the sample curvature and the deformation. At higher temperatures the coatings showed an inelastic behavior, related to their unique microstructure, as well as a toughening effect. (c) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
High-temperature mechanical behavior of plasma sprayed lanthanum zirconate coatings / G., Di Girolamo; Marra, Francesco; C., Blasi; M., Schioppa; Pulci, Giovanni; E., Serra; Valente, Teodoro. - In: CERAMICS INTERNATIONAL. - ISSN 0272-8842. - STAMPA. - 40:7 PART B(2014), pp. 11433-11436. [10.1016/j.ceramint.2014.03.110]
High-temperature mechanical behavior of plasma sprayed lanthanum zirconate coatings
MARRA, FRANCESCO;PULCI, Giovanni;VALENTE, Teodoro
2014
Abstract
Rare-earth zirconates are potential materials for thermal bather coatings. Their properties are not still well known, due to any lacks in processing and characterization techniques. To this purpose lanthanum zirconate coatings were herein manufactured by plasma spraying. The coatings exhibited high porosity, due to the presence of pores, splat boundaries and microcracks. The high-temperature evolution of mechanical properties was investigated by arranging specific bending tests up to 1500 degrees C using SiC testing assembly which allows to reconstruct and measure the sample curvature and the deformation. At higher temperatures the coatings showed an inelastic behavior, related to their unique microstructure, as well as a toughening effect. (c) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
