Physical mechanism of delta-delta '-epsilon phase stability in plutonium
文献类型：期刊论文
| 作者 | Li, Chun-Mei ; Johansson, Borje ; Vitos, Levente |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2017-07-17 |
| 卷号 | 7页码:- |
| ISSN号 | 2045-2322 |
| 通讯作者 | Li, CM (reprint author), Shenyang Normal Univ, Coll Phys Sci & Technol, Shenyang 110034, Peoples R China. ; Li, CM (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China. |
| 中文摘要 | Based on first-principle calculations, we have systematically explored the nature of the elastic stability and the delta-delta'-epsilon phase transitions in pure Pu at high temperature. It is found that, both the electronphonon coupling and the spin fluctuation effects tend to decrease the tetragonal elastic constant (C') of delta-Pu, accounting for its anomalous softening at high temperature. The lattice thermal expansion together with the electron-phonon coupling can stiffen C' of epsilon-Pu, promoting its mechanical stability at high temperature. The delta-epsilon transition is calculated to take place around 750-800 K, and is dominated by the phonon vibration. The delta' intermediate phase is realized around 750 K mainly because of the thermal spin fluctuation. |
| 学科主题 | Multidisciplinary Sciences |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [11674233, 51301176]; China Postdoctoral Science Foundation [2014T70264, 2013M530133]; Liaoning Province Science Foundation [201602672]; Swedish Research Council; Swedish Foundation for strategic Research; Swedish Foundation for International Cooperation in Research and Higher Education; Hungarian Scientific Research Fund [OTKA 109570] |
| 语种 | 英语 |
| 公开日期 | 2017-08-17 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/78039]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Li, Chun-Mei,Johansson, Borje,Vitos, Levente. Physical mechanism of delta-delta '-epsilon phase stability in plutonium[J]. SCIENTIFIC REPORTS,2017,7:-. |
| APA | Li, Chun-Mei,Johansson, Borje,&Vitos, Levente.(2017).Physical mechanism of delta-delta '-epsilon phase stability in plutonium.SCIENTIFIC REPORTS,7,-. |
| MLA | Li, Chun-Mei,et al."Physical mechanism of delta-delta '-epsilon phase stability in plutonium".SCIENTIFIC REPORTS 7(2017):-. |
入库方式： OAI收割
来源：金属研究所
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