IHEP OpenIR
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
Source PublicationNATURE COMMUNICATIONS
ISSN2041-1723
Volume6Pages:5703
SubtypeArticle
AbstractThe 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.
Subject AreaScience & Technology - Other Topics
DOI10.1038/ncomms6703
Indexed BySCI ; ADS
Language英语
WOS Research AreaMultidisciplinary Sciences
WOS SubjectScience & Technology - Other Topics
WOS IDWOS:000350034400001
ADS Bibcode2015NatCo...6.5703L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2015NatCo...6.5703L
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2015NatCo...6.5703L/citations
Citation statistics
Cited Times:19 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/228115
Collection中国科学院高能物理研究所
Recommended Citation
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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