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  4. 中国科学院地球与行星物理重点实验室
Sound wave velocities of Fe5Si at high-pressure and high-temperature conditions: Implications to lunar and planetary cores

文献类型：期刊论文

作者Deng, Liwei1,2,4; Kono, Yoshio3,5; Shen, Guoyin3
刊名AMERICAN MINERALOGIST
出版日期2019-02-01
卷号104期号:2页码:291-299
ISSN号0003-004X
关键词Fe-Si alloy elastic wave velocity lunar and planetary cores high pressure high temperature
DOI10.2138/am-2019-6564
英文摘要Elastic properties of Fe alloys are critical in constraining the compositions of planetary bodies by comparing to the planetary observations. The sound wave velocities and density of an Fe5Si (9 wt% Si) alloy in body-centered cubic (bcc) structure were measured by combining an ultrasonic technique with synchrotron X-ray radiography at pressure (P) and temperature (T) conditions of 2.6-7.5 GPa and 300-1173 K, respectively. At room temperature, it is observed that adding Si to bcc-Fe increases the compressional wave velocity (v(P)) but decreases the shear wave velocity (v(S)). At high temperatures, we observed a pronounced effect of pressure on the v(S)-T relations in the Fe5Si alloy. The v(P)-density (rho) relationship of the Fe5Si alloy is found to follow the Birch's law in the P-T range of this study, whereas the v(S)-rho relation exhibits complex behavior. Implications of these results to the lunar core and the Mercurian core are discussed. Our results imply that adding Si to a pure Fe lunar core would be invisible in terms of v(P), but exhibit a decreased v(S). Including Si in a sulfur-rich lunar core would display an increased v(P) and a decreased rho. Our density and sound wave velocity model provide lower and upper limit for a Si-bearing lunar core if 1-3 wt% Si content of enstatite chondrite is taken as compositional analog. A Si-rich (>9 wt%) Mercurian core model is derived to satisfy newly observed moment of inertia values by Messenger spacecraft.
WOS关键词EQUATION-OF-STATE ; IRON-SILICON ALLOYS ; PHASE-RELATIONS ; DENSITY-MEASUREMENTS ; EARTHS INTERIOR ; GRAVITY-FIELD ; FE-FESI ; BCC-FE ; CONSTRAINTS ; OXYGEN
资助项目Major Program of National Natural Science Foundation of China[41490632] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] ; National Natural Science Foundation of China[41374096] ; National Natural Science Foundation of China[41174071] ; DOE-BES, Division of Materials Sciences and Engineering[DEFG02-99ER45775] ; DOE-NNSA[DE-NA0001974] ; NSF ; DOE Office of Sci-ence[DE-AC02-06CH11357]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者MINERALOGICAL SOC AMER
WOS记录号WOS:000457300400010
资助机构Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; NSF ; NSF ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; NSF ; NSF ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; NSF ; NSF ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; NSF ; NSF ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; DOE Office of Sci-ence ; DOE Office of Sci-ence
源URL[http://ir.iggcas.ac.cn/handle/132A11/90496]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Deng, Liwei
作者单位1.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Carnegie Inst Sci, HPCAT, Geophys Lab, Argonne, IL 60439 USA
4.Shenzhen Technol Univ, Coll New Mat & New Energies, 3002 Lantian Rd, Shenzhen 518118, Guangdong, Peoples R China
5.Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime, Japan
推荐引用方式
GB/T 7714		 Deng, Liwei,Kono, Yoshio,Shen, Guoyin. Sound wave velocities of Fe5Si at high-pressure and high-temperature conditions: Implications to lunar and planetary cores[J]. AMERICAN MINERALOGIST,2019,104(2):291-299.
APA Deng, Liwei,Kono, Yoshio,&Shen, Guoyin.(2019).Sound wave velocities of Fe5Si at high-pressure and high-temperature conditions: Implications to lunar and planetary cores.AMERICAN MINERALOGIST,104(2),291-299.
MLA Deng, Liwei,et al."Sound wave velocities of Fe5Si at high-pressure and high-temperature conditions: Implications to lunar and planetary cores".AMERICAN MINERALOGIST 104.2(2019):291-299.

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来源：地质与地球物理研究所

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