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High-temperature mechanical behavior of plasma sprayed lanthanum zirconate coatings

TitleHigh-temperature mechanical behavior of plasma sprayed lanthanum zirconate coatings
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2014
AuthorsDi Girolamo, G., Marra F., Blasi C., Schioppa M., Pulci G., Serra Emanuele, and Valente T.
JournalCeramics International
Volume40
Pagination11433-11436
ISSN02728842
KeywordsCharacterization techniques, Coatings, E. Thermal applications, Inelastic behavior, Lanthanum, Lanthanum zirconate, Mechanical behavior, Mechanical properties, Plasma jets, Plasma spraying, Potential materials, Rare-earth zirconates, Silicon carbide, Thermal barrier coatings, Toughening effects
Abstract

Rare-earth zirconates are potential materials for thermal barrier 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 °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. © 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84900519183&doi=10.1016%2fj.ceramint.2014.03.110&partnerID=40&md5=0acc061b715dc7c842569690a918c7dc
DOI10.1016/j.ceramint.2014.03.110
Citation KeyDiGirolamo201411433