DOI: 10.1002/2016GL068848
论文题名: Compression of Fe-Si-H alloys to core pressures
作者: Tagawa S. ; Ohta K. ; Hirose K. ; Kato C. ; Ohishi Y.
刊名: Geophysical Research Letters
ISSN: 0094-9081
EISSN: 1944-8812
出版年: 2016
卷: 43, 期: 8 起始页码: 3686
结束页码: 3692
语种: 英语
英文关键词: compressibility
; core
; equation of state
; high pressure
; hydrogen
; iron alloy
Scopus关键词: Acoustic wave velocity
; Chemical elements
; Compressibility
; Equations of state
; High pressure engineering
; Hydrogen
; Silicon
; Silicon alloys
; Compression behavior
; Compression curves
; core
; Density profile
; Diamond-anvil cell
; Equation of state
; Hexagonal close packed
; High pressure
; Iron alloys
英文摘要: We examined the compression behavior of hexagonal-close-packed (hcp) (Fe0.88Si0.12)1H0.61 and (Fe0.88Si0.12)1H0.79 (in atomic ratio) alloys up to 138 GPa in a diamond anvil cell (DAC). While contradicting experimental results were previously reported on the compression curve of double-hcp (dhcp) FeHx (x ≈ 1), our data show that the compressibility of hcp Fe0.88Si0.12Hx alloys is very similar to those of hcp Fe and Fe0.88Si0.12, indicating that the incorporation of hydrogen into iron does not change its compression behavior remarkably. The present experiments suggest that the inner core may contain up to 0.47 wt % hydrogen (FeH0.26) if temperature is 5000 K. The calculated density profile of Fe0.88Si0.12H0.17 alloy containing 0.32 wt % hydrogen in addition to geochemically required 6.5 wt % silicon matches the seismological observations of the outer core, supporting that hydrogen is an important core light element. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84968877250&doi=10.1002%2f2016GL068848&partnerID=40&md5=7646fad78cf34370838a4bc5c14bdce0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10044
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: Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, Japan
Recommended Citation:
Tagawa S.,Ohta K.,Hirose K.,et al. Compression of Fe-Si-H alloys to core pressures[J]. Geophysical Research Letters,2016-01-01,43(8).