GSTDTAP  > 气候变化
DOI10.1029/2019GL084545
Phase Stability and Thermal Equation of State of Iron Carbide Fe3C to 245 GPa
Hu, Xiaojun1; Fei, Yingwei2; Yang, Jing2; Cai, Yang3; Ye, Shijia3; Qi, Meilan1; Liu, Fusheng4; Zhang, Mingjian4
2019-10-21
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2019
文章类型Article;Early Access
语种英语
国家Peoples R China; USA
英文摘要

We conducted shock wave experiments on iron carbide Fe3C up to a Hugoniot pressure of 245 GPa. The correlation between the particle velocity (u(p)) and shock wave velocity (u(s)) can be fitted into a linear relationship, u(s) = 4.627(+/- 0.073) + 1.614(+/- 0.028) u(p). The density-pressure relationship is consistent with a single-phase compression without decomposition. The inference is further supported by the comparison of the observed Hugoniot density with the calculated Hugoniot curves of possible decomposition products. The new Hugoniot data combined with the reported 300-K isothermal compression data yielded a Gruneisen parameter of gamma = 2.23(7.982/rho)(0.29). The thermal equation of state of Fe3C is further used to calculate the density profile of Fe3C along the Earth's adiabatic geotherm. The density of Fe3C was found to be too low (by similar to 5%) to match the observed density in the Earth's inner core, and Fe3C is unlikely a dominant component of the inner core.


英文关键词Earth core shockwave compression iron carbide core density core composition
领域气候变化
收录类别SCI-E
WOS记录号WOS:000491704400001
WOS关键词HIGH-PRESSURE ; HIGH-TEMPERATURE ; SOUND-VELOCITY ; CARBON CONTENT ; EARTHS CORE ; FE7C3 ; COMPRESSION ; CONSTRAINTS ; ELASTICITY ; SYSTEM
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/187731
专题气候变化
作者单位1.Wuhan Univ Technol, Sch Sci, Wuhan, Hubei, Peoples R China;
2.Carnegie Inst Sci, Geophys Lab, Washington, DC 20005 USA;
3.Peac Inst Multiscale Sci, Chengdu, Sichuan, Peoples R China;
4.Southwest Jiaotong Univ, Sch Phys Sci & Technol, Chengdu, Sichuan, Peoples R China
推荐引用方式
GB/T 7714
Hu, Xiaojun,Fei, Yingwei,Yang, Jing,et al. Phase Stability and Thermal Equation of State of Iron Carbide Fe3C to 245 GPa[J]. GEOPHYSICAL RESEARCH LETTERS,2019.
APA Hu, Xiaojun.,Fei, Yingwei.,Yang, Jing.,Cai, Yang.,Ye, Shijia.,...&Zhang, Mingjian.(2019).Phase Stability and Thermal Equation of State of Iron Carbide Fe3C to 245 GPa.GEOPHYSICAL RESEARCH LETTERS.
MLA Hu, Xiaojun,et al."Phase Stability and Thermal Equation of State of Iron Carbide Fe3C to 245 GPa".GEOPHYSICAL RESEARCH LETTERS (2019).
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