High-entropy engineering improved the corrosion resistance of rare earth tantalates
High-entropy RETa3O9 ceramics have garnered significant interest in materials science due to their impressive high melting points and lower thermal conductivity. This study focuses on three types of these ceramics: (La0.2Ce0.2Nd0.2Sm0.2Dy0.2)Ta3O9, (La0.2Ce0.2Nd0.2Sm0.2Tm0.2)Ta3O9, and SmTa3O9.The r...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424026218 |
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| author | Kunhui Yang Liujia Tian Yiling Huang Xuemei Song Fan Peng Wei Zheng Ziwei Liu Yi Zeng |
| author_facet | Kunhui Yang Liujia Tian Yiling Huang Xuemei Song Fan Peng Wei Zheng Ziwei Liu Yi Zeng |
| author_sort | Kunhui Yang |
| collection | DOAJ |
| description | High-entropy RETa3O9 ceramics have garnered significant interest in materials science due to their impressive high melting points and lower thermal conductivity. This study focuses on three types of these ceramics: (La0.2Ce0.2Nd0.2Sm0.2Dy0.2)Ta3O9, (La0.2Ce0.2Nd0.2Sm0.2Tm0.2)Ta3O9, and SmTa3O9.The results indicate that the coefficient of thermal expansion (TEC) for RETa3O9 ceramics remains in the range of approximately 5.94 × 10−6 K-1 to 6.05 × 10−6 K-1 when subjected to temperatures from room temperature up to 1400 °C. This TEC is notably similar to that of silicon carbide ceramic matrix composites (SiC-CMC), which is essential for compatibility in applications where these materials are used together.Moreover, the study highlights an important finding: after 20 h of exposure to a CMAS (calcium-magnesium-alumino-silicate) environment at 1300 °C, the high-entropy tantalates exhibit significantly reduced susceptibility to corrosion compared to traditional single-component tantalate ceramics. While single-component materials, including SmTa3O9, showed greater degradation, the high-entropy RETa3O9 ceramics maintained their original morphology, free from porosity and cracking.This impressive resistance to CMAS corrosion indicates that the high-entropy design is beneficial in enhancing the durability of tantalates in extreme environments. Consequently, these findings suggest that high-entropy RETa3O9 ceramics hold promise for use as thermal/environmental barrier coating (T/EBC) materials in applications involving SiC-CMCs, potentially leading to improved performance and longevity in high-temperature applications. |
| format | Article |
| id | doaj-art-aba517d1db3c4af693fcc28d93b8172f |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-aba517d1db3c4af693fcc28d93b8172f2024-12-26T08:55:31ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013370407047High-entropy engineering improved the corrosion resistance of rare earth tantalatesKunhui Yang0Liujia Tian1Yiling Huang2Xuemei Song3Fan Peng4Wei Zheng5Ziwei Liu6Yi Zeng7School of Microelectronics, Shanghai University, Shanghai, 201800, China; The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, ChinaThe State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, ChinaThe State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, ChinaThe State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, ChinaThe State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, ChinaThe State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, ChinaThe State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, ChinaSchool of Microelectronics, Shanghai University, Shanghai, 201800, China; The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, China; Corresponding author. 1295 Dingxi road, Shanghai, 200050, China.High-entropy RETa3O9 ceramics have garnered significant interest in materials science due to their impressive high melting points and lower thermal conductivity. This study focuses on three types of these ceramics: (La0.2Ce0.2Nd0.2Sm0.2Dy0.2)Ta3O9, (La0.2Ce0.2Nd0.2Sm0.2Tm0.2)Ta3O9, and SmTa3O9.The results indicate that the coefficient of thermal expansion (TEC) for RETa3O9 ceramics remains in the range of approximately 5.94 × 10−6 K-1 to 6.05 × 10−6 K-1 when subjected to temperatures from room temperature up to 1400 °C. This TEC is notably similar to that of silicon carbide ceramic matrix composites (SiC-CMC), which is essential for compatibility in applications where these materials are used together.Moreover, the study highlights an important finding: after 20 h of exposure to a CMAS (calcium-magnesium-alumino-silicate) environment at 1300 °C, the high-entropy tantalates exhibit significantly reduced susceptibility to corrosion compared to traditional single-component tantalate ceramics. While single-component materials, including SmTa3O9, showed greater degradation, the high-entropy RETa3O9 ceramics maintained their original morphology, free from porosity and cracking.This impressive resistance to CMAS corrosion indicates that the high-entropy design is beneficial in enhancing the durability of tantalates in extreme environments. Consequently, these findings suggest that high-entropy RETa3O9 ceramics hold promise for use as thermal/environmental barrier coating (T/EBC) materials in applications involving SiC-CMCs, potentially leading to improved performance and longevity in high-temperature applications.http://www.sciencedirect.com/science/article/pii/S2238785424026218High-entropy ceramics (HECs)Thermal expansion coefficientThermal/environmental barrier coating (T/EBC)CMAS corrosion |
| spellingShingle | Kunhui Yang Liujia Tian Yiling Huang Xuemei Song Fan Peng Wei Zheng Ziwei Liu Yi Zeng High-entropy engineering improved the corrosion resistance of rare earth tantalates Journal of Materials Research and Technology High-entropy ceramics (HECs) Thermal expansion coefficient Thermal/environmental barrier coating (T/EBC) CMAS corrosion |
| title | High-entropy engineering improved the corrosion resistance of rare earth tantalates |
| title_full | High-entropy engineering improved the corrosion resistance of rare earth tantalates |
| title_fullStr | High-entropy engineering improved the corrosion resistance of rare earth tantalates |
| title_full_unstemmed | High-entropy engineering improved the corrosion resistance of rare earth tantalates |
| title_short | High-entropy engineering improved the corrosion resistance of rare earth tantalates |
| title_sort | high entropy engineering improved the corrosion resistance of rare earth tantalates |
| topic | High-entropy ceramics (HECs) Thermal expansion coefficient Thermal/environmental barrier coating (T/EBC) CMAS corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424026218 |
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