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Hierarchical densification and negative thermal expansion in Ce-based metallic glass under high pressure
Luo, Q; Garbarino, GT; Sun, BA; Fan, DW; Zhang, Y; Wang, Z; Sun, YJ; Jiao, J; Li, XD; Li, PS; Mattern, N; Eckert, J; Shen, J; Li XD(李晓东); Li PS(李鹏善)
2015
发表期刊NATURE COMMUNICATIONS
卷号6页码:5703
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.
文章类型Article
学科领域Science & Technology - Other Topics
DOI10.1038/ncomms6703
收录类别SCI
WOS类目Multidisciplinary Sciences
WOS记录号WOS:000350034400001
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228115
专题多学科研究中心
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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.
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