High-temperature mechanical behavior of plasma sprayed lanthanum zirconate coatings

G. Di Girolamo, F. Marra, C. Blasi, M. Schioppa, G. Pulci, E. Serra, T. Valente

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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.
Original languageEnglish
Pages (from-to)11433 - 11436
Number of pages4
JournalCeramics International
Volume40
Issue number7 PART B
DOIs
Publication statusPublished - 2014
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials

Cite this

Di Girolamo, G., Marra, F., Blasi, C., Schioppa, M., Pulci, G., Serra, E., & Valente, T. (2014). High-temperature mechanical behavior of plasma sprayed lanthanum zirconate coatings. Ceramics International, 40(7 PART B), 11433 - 11436. https://doi.org/10.1016/j.ceramint.2014.03.110