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Design, fabrication, and characterization of new materials based on zirconia doped with mixed rare earth oxides: review and first experimental results

hal.structure.identifierNational Research & Development Institute for Non-ferrous and Rare Metals [IMNR]
dc.contributor.authorMOTOC, Adrian Mihail
hal.structure.identifierNational Research & Development Institute for Non-ferrous and Rare Metals [IMNR]
dc.contributor.authorVALSAN, Sorina
hal.structure.identifierNational Research & Development Institute for Non-ferrous and Rare Metals [IMNR]
dc.contributor.authorSLOBOZEANU, Anca
hal.structure.identifierNational Research & Development Institute for Non-ferrous and Rare Metals [IMNR]
dc.contributor.authorCORBAN, Mircea
hal.structure.identifierAgenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile = Italian National Agency for New Technologies, Energy and Sustainable Economic Development [ENEA]
dc.contributor.authorVALERINI, Daniele
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPRAKASAM, Mythili
hal.structure.identifierInstitute for Aeronautics “Elie Carafoli”
dc.contributor.authorBOTAN, Mihail
hal.structure.identifierNational Research & Development Institute for Non-ferrous and Rare Metals [IMNR]
dc.contributor.authorDRAGUT, Valentin
hal.structure.identifierNational Research Center for Micro and Nanomaterials
dc.contributor.authorST. VASILE, Bogdan
hal.structure.identifierNational Research Center for Micro and Nanomaterials
dc.contributor.authorSURDU, Adrian
hal.structure.identifierNational Research Center for Micro and Nanomaterials
dc.contributor.authorTRUSCA, Roxana
hal.structure.identifierAgenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile = Italian National Agency for New Technologies, Energy and Sustainable Economic Development [ENEA]
dc.contributor.authorGRILLI, Maria
hal.structure.identifierNational Research & Development Institute for Non-ferrous and Rare Metals [IMNR]
dc.contributor.authorPITICESCU, Radu Robert
dc.date.issued2020
dc.identifier.issn2075-4701
dc.description.abstractEnMonazite is one of the most valuable natural resources for rare earth oxides (REOs) used as dopants with high added value in ceramic materials for extreme environments applications. The complexity of the separation process in individual REOs, due to their similar electronic configuration and physical–chemical properties, is reflected in products with high price and high environmental footprint. During last years, there was an increasing interest for using different mixtures of REOs as dopants for high temperature ceramics, in particular for ZrO2-based thermal barrier coatings (TBCs) used in aeronautics and energy co-generation. The use of mixed REOs may increase the working temperature of the TBCs due to the formation of tetragonal and cubic solid solutions with higher melting temperatures, avoiding grain size coarsening due to interface segregation, enhancing its ionic conductivity and sinterability. The thermal stability of the coatings may be further improved by using rare earth zirconates with perovskite or pyrochlore structures having no phase transitions before melting. Within this research framework, firstly we present a review analysis about results reported in the literature so far about the use of ZrO2 ceramics doped with mixed REOs for high temperature applications. Then, preliminary results about TBCs fabricated by electron beam evaporation starting from mixed REOs simulating the real composition as occurring in monazite source minerals are reported. This novel recipe for ZrO2-based TBCs, if optimized, may lead to better materials with lower costs and lower environmental impact, as a result of the elimination of REOs extraction and separation in individual lanthanides. Preliminary results on the compositional, microstructure, morphological, and thermal properties of the tested materials are reported.
dc.description.sponsorshipNew concepts for efficient extraction of mixed rare earths oxides from monazite concentrates and their potential use as dopant in high temperature coatings and sintered materials
dc.language.isoen
dc.publisherMDPI
dc.rights.urihttp://creativecommons.org/licenses/by-nd/
dc.subject.enzirconia
dc.subject.enrare earth zirconates
dc.subject.enthermal barrier coatings
dc.subject.enmicrostructure characterization
dc.subject.enthermal shock resistance
dc.title.enDesign, fabrication, and characterization of new materials based on zirconia doped with mixed rare earth oxides: review and first experimental results
dc.typeArticle de revue
dc.identifier.doi10.3390/met10060746
dc.subject.halChimie/Matériaux
dc.subject.halChimie/Chimie inorganique
bordeaux.journalMetals
bordeaux.page746
bordeaux.volume10
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-02877830
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02877830v1
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