Ferroelastic rare-earth tantalates: Physical mechanisms and multilayer architectures for extreme solar thermal protection
文献类型：期刊论文
| 作者 | Wang JX(王晶星)1,2; Tian, Jiang1; Feng, Jing1 |
| 刊名 | MODERN PHYSICS LETTERS B
 |
| 出版日期 | 2026 |
| 关键词 | Rare-earth tantalates ferroelasticity thermal protection system high-entropy ceramics interface physics |
| ISSN号 | 0217-9849 |
| DOI | 10.1142/S0217984926400087 |
| 产权排序 | 第2完成单位 |
| 文献子类 | Article; Early Access |
| 英文摘要 | The Solar Close Observations and Proximity Experiments (SCOPE) mission imposes unprecedented thermal challenges on advanced protection systems, necessitating sustained resistance to temperatures exceeding 2000 degrees C and radiative heat fluxes above 2.52 MW.m(-2). However, current experimental validations for candidate ceramic systems are primarily limited to the 1200-1600 degrees C range. This critical review systematically evaluates rare-earth tantalates (RETs) as a transformative class of materials for next-generation thermal/environmental barrier coatings (T/EBCs). We comprehensively analyze the diverse crystallographic stoichiometries of RETs - including ferroelastic m-RETaO4, weberite/defect-fluorite RETa3O7, and perovskite-like RETa3O9 - and their correlation with thermophysical and fracture-related properties. RETs exhibit intrinsically low thermal conductivity, with reported values in the range of 1.2-2.0 W. m(-1). K-1 at 800-1200 degrees C depending on composition, density, and processing route, which approaches the theoretical amorphous lower bound predicted by Cahill's minimum thermal conductivity model. Additionally, RETs show engineered coefficients of thermal expansion (similar to 10-12 x 10(-6) K-1) and ferroelastic domain-switching toughening, yielding fracture toughness values of approximately 2-3 MPa.m(1/2). In stark contrast to conventional yttriastabilized zirconia, RETs demonstrate clear advantages in high-temperature phase stability and resistance to CMAS-induced degradation. This work elucidates the dominant thermomechanical mechanisms based on fundamental crystal physics: from anharmonic phonon scattering induced by mass-difference and high-entropy lattice distortion, to energy dissipation via ferroelastic domain switching as predicted by co-elastic theory. Furthermore, we highlight the role of chemical stability, specifically the formation of apatite phases during CMAS interactions and the inherently low oxygen ionic conductivity (> 10(-5) S.cm(-1)). Finally, the review addresses scalability through high-entropy engineering- leveraging the cocktail effect for stability -and proposes advanced multilayer architectures (e.g. C/C-Ir-RET-Al2O3) tailored for SCOPE-specific extremes. This synthesis establishes RETs as pivotal candidates for ultrahigh-temperature aerospace applications and identifies future directions for compositional tailoring and cross-scale simulations. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE |
| WOS关键词 | BARRIER COATINGS ; RETAO4 RE ; CONDUCTIVITY ; EU ; GD ; ND ; SM ; DY ; MICROSTRUCTURE ; LA |
| 资助项目 | N/A |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001765762000001 |
| 出版者 | WORLD SCIENTIFIC PUBL CO PTE LTD |
| 资助机构 | N/A |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29226]  |
| 专题 | 云南天文台_太阳物理研究组 |
| 通讯作者 | Feng, Jing |
| 作者单位 | 1.Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China |
| 推荐引用方式 GB/T 7714 | Wang JX,Tian, Jiang,Feng, Jing. Ferroelastic rare-earth tantalates: Physical mechanisms and multilayer architectures for extreme solar thermal protection[J]. MODERN PHYSICS LETTERS B,2026. |
| APA | 王晶星,Tian, Jiang,&Feng, Jing.(2026).Ferroelastic rare-earth tantalates: Physical mechanisms and multilayer architectures for extreme solar thermal protection.MODERN PHYSICS LETTERS B. |
| MLA | 王晶星,et al."Ferroelastic rare-earth tantalates: Physical mechanisms and multilayer architectures for extreme solar thermal protection".MODERN PHYSICS LETTERS B (2026). |
入库方式： OAI收割
来源：云南天文台
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