| DOI: | 10.1002/2015GL064271
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| 论文题名: | Microscopic structural change in a liquid Fe-C alloy of ∼5GPa |
| 作者: | Shibazaki Y.; Kono Y.; Fei Y.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9141
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| EISSN: | 1944-8872
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| 出版年: | 2015
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| 卷: | 42, 期:13 | | 起始页码: | 5236
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| 结束页码: | 5242
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| 语种: | 英语
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| 英文关键词: | Fe-C alloy
; high pressure
; iron alloy
; liquid structure
; planetary core
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| Scopus关键词: | Alloys
; Chemical elements
; Distribution functions
; Liquids
; X ray diffraction
; Energy dispersive x-ray diffractions
; Fe-C alloys
; High pressure
; Liquid structures
; Pair distribution functions
; Planetary core
; Pressure dependencies
; X-ray diffraction data
; Iron alloys
; alloy
; carbon
; density
; high pressure
; iron
; liquid
; nearest neighbor analysis
; planetary landform
; structural change
; volume
; X-ray diffraction
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| 英文摘要: | The structure of a liquid Fe-3.5wt% C alloy is examined for up to 7.2GPa via multiangle energy-dispersive X-ray diffraction using a Paris-Edinburgh type large-volume press. X-ray diffraction data show clear changes in the pressure-dependent peak positions of structure factor and reduced pair distribution function at 5GPa. These results suggest that the liquid Fe-3.5wt% C alloys change structurally at approximately 5GPa. This finding serves as a microscopic explanation for the alloy's previously observed density change at the same pressure. The pressure dependencies of the nearest and second neighbor distances of the liquid Fe-3.5wt% C alloy are similar to those of liquid Fe which exhibits a structural change near the bcc-fcc-liquid triple point (5.2GPa and 1991K). Similarities between Fe-3.5wt% C and Fe suggest that a density change also occurs in liquid Fe and that this structural change extends to other Fe-light element alloys. Key Points The structure of liquid Fe-3.5wt% C is measured for up to 7.2GPa Liquid Fe-3.5wt% C changes structurally at 5GPa Structural changes in liquid Fe-C alloys are likely to induce density anomalies. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938206769&doi=10.1002%2f2015GL064271&partnerID=40&md5=03bb5159386fedf18671cd446fff214f
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8757
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Japan
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| Recommended Citation: | |
Shibazaki Y.,Kono Y.,Fei Y.. Microscopic structural change in a liquid Fe-C alloy of ∼5GPa[J]. Geophysical Research Letters,2015-01-01,42(13).
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