| New mechanism revealed on the anomalous thermal expansion behavior of NbO2F | |
| Li, Wanwu1,2; Zhang, Kun1,2; Zhao, Xueting1,2; Li, Kuo3; Li, Yanchun4; Yin, Wen4,5; Li, Bing1,2 | |
| 通讯作者 | Zhang, Kun(kzhang@imr.ac.cn) ; Li, Bing(bingli@imr.ac.cn) |
| 2025-03-15 | |
| 发表期刊 | SCRIPTA MATERIALIA
 |
| ISSN | 1359-6462 |
| 卷号 | 258页码:5 |
| 摘要 | The near-zero thermal expansion of TaO2F across a broad temperature range indicates its potential application in components requiring high thermal shock resistance. Nevertheless, the structurally analogous NbO2F maintains low thermal expansion only at high temperatures and demonstrates significant positive thermal expansion at low temperatures, yet the underlying reasons for this anomalous behavior have remained elusive. In this study, we utilize neutron powder diffraction and synchrotron X-ray diffraction to uncover, for the first time, a temperature induced structural phase transition in NbO2F, shifting from a cubic to a rhombohedral phase. This discovery establishes a direct link between the phase transition and the anomalous thermal expansion behavior, resolving long-standing scientific puzzle. Additionally, we construct a detailed pressure-temperature phase diagram, providing critical insights into the thermal properties of NbO2F under varying conditions, offering valuable guidance for the design of materials with tailored thermal properties. |
| 关键词 | Thermal expansion Phase transformations Neutron diffraction X-ray diffraction Phase diagram |
| 资助者 | Innovation Fund of Institute of Metal Research, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences ; National Natural Science Foundation of China ; CSNS Consortium on High-performance Materials of Chinese Academy of Sciences |
| DOI | 10.1016/j.scriptamat.2024.116534 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Innovation Fund of Institute of Metal Research, Chinese Academy of Sciences[2021-ZD01] ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences[ZDBS-LY-JSC002] ; National Natural Science Foundation of China[52425107] ; CSNS Consortium on High-performance Materials of Chinese Academy of Sciences |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS类目 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS记录号 | WOS:001399081300001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/180172 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Zhang, Kun; Li, Bing |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Ctr High Pressure Sci & Technol Adv Res, Beijing 100193, Peoples R China 4.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 5.Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Wanwu,Zhang, Kun,Zhao, Xueting,et al. New mechanism revealed on the anomalous thermal expansion behavior of NbO2F[J]. SCRIPTA MATERIALIA,2025,258:5. |
| APA | Li, Wanwu.,Zhang, Kun.,Zhao, Xueting.,Li, Kuo.,Li, Yanchun.,...&Li, Bing.(2025).New mechanism revealed on the anomalous thermal expansion behavior of NbO2F.SCRIPTA MATERIALIA,258,5. |
| MLA | Li, Wanwu,et al."New mechanism revealed on the anomalous thermal expansion behavior of NbO2F".SCRIPTA MATERIALIA 258(2025):5. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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