Hierarchical densification and negative thermal expansion in Ce-based metallic glass under high pressure
文献类型：期刊论文
| 作者 | Luo, Q; Garbarino, GT; Sun, BA; Fan, DW; Zhang, Y; Wang, Z; Sun, YJ; Jiao, J; Li, XD; Li, PS |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2015 |
| 卷号 | 6页码:5703 |
| 英文摘要 | The polyamorphsim in amorphous materials is one of the most fascinating topics in condensed matter physics. In amorphous metals, the nature of polyamorphic transformation is poorly understood. Here we investigate the structural evolution of a Ce-based metallic glass (MG) with pressure at room temperature (RT) and near the glass transition temperature by synchrotron X-ray diffraction, uncovering novel behaviours. The MG shows hierarchical densification processes at both temperatures, arising from the hierarchy of interatomic interactions. In contrast with a continuous and smooth process for the low- to medium-density amorphous state transformation at RT, a relatively abrupt and discontinuous transformation around 5.5 GPa is observed at 390 K, suggesting a possible weak first-order nature. Furthermore, both positive and abnormal-negative thermal expansion behaviours on medium-range order are observed in different pressure windows, which could be related to the low-energy vibrational motions and relaxation of the weakly linked solute-centred clusters. |
| 学科主题 | Science & Technology - Other Topics |
| 类目[WOS] | Multidisciplinary Sciences |
| 收录类别 | SCI |
| WOS记录号 | WOS:000350034400001 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228115]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Luo, Q,Garbarino, GT,Sun, BA,et al. Hierarchical densification and negative thermal expansion in Ce-based metallic glass under high pressure[J]. NATURE COMMUNICATIONS,2015,6:5703. |
| APA | Luo, Q.,Garbarino, GT.,Sun, BA.,Fan, DW.,Zhang, Y.,...&李鹏善.(2015).Hierarchical densification and negative thermal expansion in Ce-based metallic glass under high pressure.NATURE COMMUNICATIONS,6,5703. |
| MLA | Luo, Q,et al."Hierarchical densification and negative thermal expansion in Ce-based metallic glass under high pressure".NATURE COMMUNICATIONS 6(2015):5703. |
入库方式： OAI收割
来源：高能物理研究所
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