globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116357
论文题名:
Resistivity saturation of hcp Fe-Si alloys in an internally heated diamond anvil cell: A key to assessing the Earth's core conductivity
作者: Inoue H.; Suehiro S.; Ohta K.; Hirose K.; Ohishi Y.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 543
语种: 英语
中文关键词: Earth's core ; electrical resistivity ; Fe-Si alloys ; resistivity saturation ; thermal conductivity
英文关键词: Acoustic wave velocity ; Chemical elements ; Electric conductivity ; Silicon alloys ; Temperature distribution ; Thermal conductivity ; Diamond-anvil cell ; High-pressure and temperatures ; Saturation model ; Saturation phenomenons ; Si concentration ; Temperature dependence ; Terminal method ; Thermal evolution ; Iron alloys ; alloy ; core (planetary) ; diamond anvil cell ; Earth structure ; electrical resistivity ; inner core ; iron ; P-T conditions ; saturation ; silicon ; thermal conductivity ; thermal evolution ; thermal structure
英文摘要: Electrical resistivity and thermal conductivity of iron (Fe)-light element alloys at high pressure and temperature are key parameters to constrain the dynamics and thermal evolution of the Earth's core. We determined the electrical resistivity of hcp Fe-2, 4 and 6.5 wt.% silicon (Si) alloys up to 117 GPa and 3120 K using a four-terminal method in an internally heated diamond-anvil cell. The temperature dependence of electrical resistivity of hcp Fe-Si alloys was suppressed as both Si concentration and temperature increased, which indicates the resistivity saturation phenomenon: the electrical resistivity of metal asymptotically approaches the “saturation resistivity”. Our results are fully reproduced by a highly resistive saturation model, and the obtained saturation resistivities for hcp Fe-Si alloys are comparable to those for hcp pure Fe at around 100 GPa. If Si is a major light element in the Earth's core, the pure Fe like saturation resistivity would keep the core conductivity high enough to induce active dynamics there and rapid growth of the inner core. © 2020 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165048
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Meguro, Tokyo, 152-8551, Japan; Earth-Life Science Institute, Tokyo Institute of Technology, Meguro, Tokyo, 152-8550, Japan; Department of Earth and Planetary Science, The University of Tokyo, Bunkyo, Tokyo, 113-0033, Japan; Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan

Recommended Citation:
Inoue H.,Suehiro S.,Ohta K.,et al. Resistivity saturation of hcp Fe-Si alloys in an internally heated diamond anvil cell: A key to assessing the Earth's core conductivity[J]. Earth and Planetary Science Letters,2020-01-01,543
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Inoue H.]'s Articles
[Suehiro S.]'s Articles
[Ohta K.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Inoue H.]'s Articles
[Suehiro S.]'s Articles
[Ohta K.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Inoue H.]‘s Articles
[Suehiro S.]‘s Articles
[Ohta K.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.