Different mechanisms of A-site and B-site high entropy effect on radiation tolerance of pyrochlores
文献类型：期刊论文
| 作者 | Li, Yuxin1; Lei, Yiming2; Xiao, Hao1; Zhao, Shuang1; Wang, Yugang1; Cao, Zini3,4; Zhang, Jie2; Wang, Jingyang2; Lu, Guowei3,4; Cao, Liuxuan5 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2024-08-20 |
| 卷号 | 191页码:250-258 |
| 关键词 | High entropy pyrochlores In situ irradiation Crystal overlap Hamilton population Electron binding energy |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2024.02.002 |
| 通讯作者 | Wang, Chenxu(cxwang@pku.edu.cn) |
| 英文摘要 | The properties of high entropy pyrochlore have been studied extensively, but there is no consistent conclusion on its radiation tolerance. Besides, the mechanism of the high entropy effect on the radiation tolerance of pyrochlore is still unclear. In this work, combined with experiments and calculations of pyrochlores with similar cationic radius ratios, the A -site and B -site high entropy effects on structural evolution under irradiation are analyzed. In situ irradiation experiments were carried out on A -site high entropy pyrochlores such as (La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7, B -site Gd2(Ti1/3Sn1/3Zr1/3)2O7, and ternary pyrochlore Sm2Zr2O7 and Gd2Sn2O7 for comparison. The A -site high entropy pyrochlore can maintain a stable structure under high fluence irradiation like corresponding ternary pyrochlore, demonstrated by high angle annular dark field scanning transmission electron microscopy (HAADF-STEM), energy dispersive spectroscopy (EDS) mapping and Raman spectrum. The additional irradiation experiments on A -site high entropy pyrochlores (La1/3Nd1/3Gd1/3)2Zr2O7 and (Nd1/3Sm1/3Gd1/3)2Zr2O7 also confirm the similarity under irradiation between A -site high entropy and ternary pyrochlores. However, the B -site high entropy pyrochlore Gd2(Ti1/3Sn1/3Zr1/3)2O7 becomes amorphous at exceptionally low irradiation fluences, indicating a significantly distinct radiation tolerance compared with the A -site high entropy. The difference between the A -site and B -site high entropy effect is analyzed from cationic lattice distortion, bond strength, and inner electron binding energy by first -principles calculations. The results reveal the role and mechanism of the high entropy effect in pyrochlores and lay a foundation for material design and future applications. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| 资助项目 | National Natural Science Foundation of China[12275009] ; National Natural Science Foundation of China[12192280] ; National Natural Science Foundation of China[11935004] ; National Magnetic Confinement Fusion Energy Research Project[2021YFE031100] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001198869600001 |
| 出版者 | JOURNAL MATER SCI TECHNOL |
| 资助机构 | National Natural Science Foundation of China ; National Magnetic Confinement Fusion Energy Research Project |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wang, Chenxu |
| 作者单位 | 1.Peking Univ, Ctr Appl Phys & Technol, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Peking Univ, Frontiers Sci Ctr Nanooptoelectron, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China 4.Peking Univ, Collaborat Innovat Ctr Quantum Matter, Sch Phys, Beijing 100871, Peoples R China 5.Xiamen Univ, Coll Energy, Xiamen 361102, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yuxin,Lei, Yiming,Xiao, Hao,et al. Different mechanisms of A-site and B-site high entropy effect on radiation tolerance of pyrochlores[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2024,191:250-258. |
| APA | Li, Yuxin.,Lei, Yiming.,Xiao, Hao.,Zhao, Shuang.,Wang, Yugang.,...&Wang, Chenxu.(2024).Different mechanisms of A-site and B-site high entropy effect on radiation tolerance of pyrochlores.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,191,250-258. |
| MLA | Li, Yuxin,et al."Different mechanisms of A-site and B-site high entropy effect on radiation tolerance of pyrochlores".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 191(2024):250-258. |
入库方式： OAI收割
来源：金属研究所
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