Design, Fabrication, and Characterization of New Materials Based on Zirconia Doped with Mixed Rare Earth Oxides: Review and First Experimental Results
Monazite 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 physica...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/6/746 |
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| author | Adrian Mihail Motoc Sorina Valsan Anca Elena Slobozeanu Mircea Corban Daniele Valerini Mythili Prakasam Mihail Botan Valentin Dragut Bogdan St. Vasile Adrian Vasile Surdu Roxana Trusca Maria Luisa Grilli Robert Radu Piticescu |
| author_facet | Adrian Mihail Motoc Sorina Valsan Anca Elena Slobozeanu Mircea Corban Daniele Valerini Mythili Prakasam Mihail Botan Valentin Dragut Bogdan St. Vasile Adrian Vasile Surdu Roxana Trusca Maria Luisa Grilli Robert Radu Piticescu |
| author_sort | Adrian Mihail Motoc |
| collection | DOAJ |
| description | Monazite 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 ZrO<sub>2</sub>-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 ZrO<sub>2</sub> 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 ZrO<sub>2</sub>-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. |
| first_indexed | 2024-03-10T19:23:48Z |
| format | Article |
| id | doaj.art-7403d3a0e23245c3825d2757cec78a0b |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T19:23:48Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-7403d3a0e23245c3825d2757cec78a0b2023-11-20T02:46:16ZengMDPI AGMetals2075-47012020-06-0110674610.3390/met10060746Design, Fabrication, and Characterization of New Materials Based on Zirconia Doped with Mixed Rare Earth Oxides: Review and First Experimental ResultsAdrian Mihail Motoc0Sorina Valsan1Anca Elena Slobozeanu2Mircea Corban3Daniele Valerini4Mythili Prakasam5Mihail Botan6Valentin Dragut7Bogdan St. Vasile8Adrian Vasile Surdu9Roxana Trusca10Maria Luisa Grilli11Robert Radu Piticescu12National R&D Institute for Nonferrous and Rare Metals-IMNR, Laboratory for Advanced and Nanostructured Materials and HighPTMET Center, 102 Biruintei Blvd, Pantelimon, 077145 Ilfov, RomaniaNational R&D Institute for Nonferrous and Rare Metals-IMNR, Laboratory for Advanced and Nanostructured Materials and HighPTMET Center, 102 Biruintei Blvd, Pantelimon, 077145 Ilfov, RomaniaNational R&D Institute for Nonferrous and Rare Metals-IMNR, Laboratory for Advanced and Nanostructured Materials and HighPTMET Center, 102 Biruintei Blvd, Pantelimon, 077145 Ilfov, RomaniaNational R&D Institute for Nonferrous and Rare Metals-IMNR, Laboratory for Advanced and Nanostructured Materials and HighPTMET Center, 102 Biruintei Blvd, Pantelimon, 077145 Ilfov, RomaniaENEA–Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Brindisi Research Centre, S.S.7 Appia-km 706, 72100 Brindisi, ItalyUniversity Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026 Pessac, 33600 Bordeaux, FranceNational R&D Institute for Aeronautics “Elie Carafoli”, 066126 Bucharest, RomaniaNational R&D Institute for Nonferrous and Rare Metals-IMNR, Laboratory for Advanced and Nanostructured Materials and HighPTMET Center, 102 Biruintei Blvd, Pantelimon, 077145 Ilfov, RomaniaNational Research Center for Micro and Nanomaterials, University Politehnica from Bucharest, 060042 Bucharest, RomaniaNational Research Center for Micro and Nanomaterials, University Politehnica from Bucharest, 060042 Bucharest, RomaniaNational Research Center for Micro and Nanomaterials, University Politehnica from Bucharest, 060042 Bucharest, RomaniaENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Casaccia Research Centre, Via Anguillarese 301, 00123 Rome, ItalyNational R&D Institute for Nonferrous and Rare Metals-IMNR, Laboratory for Advanced and Nanostructured Materials and HighPTMET Center, 102 Biruintei Blvd, Pantelimon, 077145 Ilfov, RomaniaMonazite 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 ZrO<sub>2</sub>-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 ZrO<sub>2</sub> 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 ZrO<sub>2</sub>-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.https://www.mdpi.com/2075-4701/10/6/746zirconiarare earth zirconatesthermal barrier coatingsmicrostructure characterizationthermal shock resistance |
| spellingShingle | Adrian Mihail Motoc Sorina Valsan Anca Elena Slobozeanu Mircea Corban Daniele Valerini Mythili Prakasam Mihail Botan Valentin Dragut Bogdan St. Vasile Adrian Vasile Surdu Roxana Trusca Maria Luisa Grilli Robert Radu Piticescu Design, Fabrication, and Characterization of New Materials Based on Zirconia Doped with Mixed Rare Earth Oxides: Review and First Experimental Results Metals zirconia rare earth zirconates thermal barrier coatings microstructure characterization thermal shock resistance |
| title | Design, Fabrication, and Characterization of New Materials Based on Zirconia Doped with Mixed Rare Earth Oxides: Review and First Experimental Results |
| title_full | Design, Fabrication, and Characterization of New Materials Based on Zirconia Doped with Mixed Rare Earth Oxides: Review and First Experimental Results |
| title_fullStr | Design, Fabrication, and Characterization of New Materials Based on Zirconia Doped with Mixed Rare Earth Oxides: Review and First Experimental Results |
| title_full_unstemmed | Design, Fabrication, and Characterization of New Materials Based on Zirconia Doped with Mixed Rare Earth Oxides: Review and First Experimental Results |
| title_short | Design, Fabrication, and Characterization of New Materials Based on Zirconia Doped with Mixed Rare Earth Oxides: Review and First Experimental Results |
| title_sort | design fabrication and characterization of new materials based on zirconia doped with mixed rare earth oxides review and first experimental results |
| topic | zirconia rare earth zirconates thermal barrier coatings microstructure characterization thermal shock resistance |
| url | https://www.mdpi.com/2075-4701/10/6/746 |
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