| Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9 | |
| Liu, Hanwen1,2; Liu, Ling1,3,4; Xiang, Huimin2; Dai, Fu-Zhi2; Wang, Xiaohui5; Huang, Muzhang6; Wan, Chunlei; Ma, Zhuang1,3,4; Liu, Yanbo1,3,4; Li, Hezhang1; Zhou, Yanchun2 | |
| Corresponding Author | Liu, Ling(richard@bit.edu.cn) ; Zhou, Yanchun(yczhou@alum.imr.ac.cn) |
| 2022-07-01 | |
| Source Publication | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
 |
| ISSN | 0955-2219 |
| Volume | 42Issue:8Pages:3559-3569 |
| Abstract | To explore the mechanism of phase transformation, YTa3O9 was prepared by an integrated one-step synthesis and sintering method at 1500 degrees C using Y2O3 and Ta2O5 powders as starting materials. High-temperature XRD pat-terns and Raman spectra showed that a phase transformation from orthorhombic to tetragonal took place in YTa3O9 through the bond length and angle changes at 300-400 degrees C, which caused a thermal conductivity rise. To inhibit the phase transformation, a high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2)Ta3O9 (HE RETa3O9) was designed and synthesized at 1550 degrees C using the integrated solid-state synthesis and sintering method. In tetragonal structured HE RETa3O9, phase transformation was inhibited by the high-entropy effect. Furthermore, HE RETa3O9 exhibited low thermal conductivity, and its tendency to increase with temperature was alleviated (1.69 W/m.K, 1073 K). Good phase stability, low thermal conductivity and comparable fracture toughness to YSZ make HE RETa3O9 promising as a new thermal barrier coating material. |
| Keyword | Rare-earth tantalate Phase transformation Thermal barrier coatings (TBCs) High-entropy ceramics (HECs) Integrated synthesis and sintering |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1016/j.jeurceramsoc.2022.03.005 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51772027] ; National Natural Science Foundation of China[51972089] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Ceramics |
| WOS ID | WOS:000790250100004 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/172477 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, Ling; Zhou, Yanchun |
| Affiliation | 1.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China 2.Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China 3.Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China 4.Beijing Inst Technol, Chongqing Innovat Ctr, Chongqing 401120, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 6.Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China |
| Recommended Citation GB/T 7714 | Liu, Hanwen,Liu, Ling,Xiang, Huimin,et al. Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2022,42(8):3559-3569. |
| APA | Liu, Hanwen.,Liu, Ling.,Xiang, Huimin.,Dai, Fu-Zhi.,Wang, Xiaohui.,...&Zhou, Yanchun.(2022).Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,42(8),3559-3569. |
| MLA | Liu, Hanwen,et al."Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 42.8(2022):3559-3569. |
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