High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials
Abstract High-entropy pyrochlore-type structures based on rare-earth zirconates are successfully produced by conventional solid-state reaction method. Six rare-earth oxides (La2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, and Y2O3) and ZrO2 are used as the raw powders. Five out of the six rare-earth oxides with...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2019-07-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s40145-019-0342-4 |
| _version_ | 1797725825811873792 |
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| author | Fei Li Lin Zhou Ji-Xuan Liu Yongcheng Liang Guo-Jun Zhang |
| author_facet | Fei Li Lin Zhou Ji-Xuan Liu Yongcheng Liang Guo-Jun Zhang |
| author_sort | Fei Li |
| collection | DOAJ |
| description | Abstract High-entropy pyrochlore-type structures based on rare-earth zirconates are successfully produced by conventional solid-state reaction method. Six rare-earth oxides (La2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, and Y2O3) and ZrO2 are used as the raw powders. Five out of the six rare-earth oxides with equimolar ratio and ZrO2 are mixed and sintered at different temperatures for investigating the reaction process. The results demonstrate that the high-entropy pyrochlores (5RE1/5)2Zr2O7 have been formed after heated at 1000°C. The (5RE1/5)2Zr2O7 are highly sintering resistant and possess excellent thermal stability. The thermal conductivities of the (5RE1/5)2Zr2O7 high-entropy ceramics are below 1 W·m–1·K–1 in the temperature range of 300–1200°C. The (5RE1/5)2Zr2O7 can be potential thermal barrier coating materials. |
| first_indexed | 2024-03-12T10:36:48Z |
| format | Article |
| id | doaj.art-9739f09fddd345df87689621c492bf52 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T10:36:48Z |
| publishDate | 2019-07-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-9739f09fddd345df87689621c492bf522023-09-02T08:40:21ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082019-07-018457658210.1007/s40145-019-0342-4High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materialsFei Li0Lin Zhou1Ji-Xuan Liu2Yongcheng Liang3Guo-Jun Zhang4State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, College of Science, Donghua UniversityState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, College of Science, Donghua UniversityState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, College of Science, Donghua UniversityState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, College of Science, Donghua UniversityState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, College of Science, Donghua UniversityAbstract High-entropy pyrochlore-type structures based on rare-earth zirconates are successfully produced by conventional solid-state reaction method. Six rare-earth oxides (La2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, and Y2O3) and ZrO2 are used as the raw powders. Five out of the six rare-earth oxides with equimolar ratio and ZrO2 are mixed and sintered at different temperatures for investigating the reaction process. The results demonstrate that the high-entropy pyrochlores (5RE1/5)2Zr2O7 have been formed after heated at 1000°C. The (5RE1/5)2Zr2O7 are highly sintering resistant and possess excellent thermal stability. The thermal conductivities of the (5RE1/5)2Zr2O7 high-entropy ceramics are below 1 W·m–1·K–1 in the temperature range of 300–1200°C. The (5RE1/5)2Zr2O7 can be potential thermal barrier coating materials.http://link.springer.com/article/10.1007/s40145-019-0342-4thermal barrier coating (TBC)pyrochlorehigh-entropy ceramicsthermal conductivity |
| spellingShingle | Fei Li Lin Zhou Ji-Xuan Liu Yongcheng Liang Guo-Jun Zhang High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials Journal of Advanced Ceramics thermal barrier coating (TBC) pyrochlore high-entropy ceramics thermal conductivity |
| title | High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials |
| title_full | High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials |
| title_fullStr | High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials |
| title_full_unstemmed | High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials |
| title_short | High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials |
| title_sort | high entropy pyrochlores with low thermal conductivity for thermal barrier coating materials |
| topic | thermal barrier coating (TBC) pyrochlore high-entropy ceramics thermal conductivity |
| url | http://link.springer.com/article/10.1007/s40145-019-0342-4 |
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