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Sound wave velocities of Fe5Si at high-pressure and high-temperature conditions: Implications to lunar and planetary cores
Deng, Liwei1,2,4; Kono, Yoshio3,5; Shen, Guoyin3
2019-02-01
Source PublicationAMERICAN MINERALOGIST
ISSN0003-004X
Volume104Issue:2Pages:291-299
AbstractElastic 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.
KeywordFe-Si alloy elastic wave velocity lunar and planetary cores high pressure high temperature
DOI10.2138/am-2019-6564
Funding OrganizationMajor 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 ; 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-NNSA ; DOE-NNSA ; NSF ; NSF ; 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 ; 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 ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; 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 ; 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 ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; 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 ; 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 ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; DOE Office of Sci-ence ; DOE Office of Sci-ence
WOS KeywordEQUATION-OF-STATE ; IRON-SILICON ALLOYS ; PHASE-RELATIONS ; DENSITY-MEASUREMENTS ; EARTHS INTERIOR ; GRAVITY-FIELD ; FE-FESI ; BCC-FE ; CONSTRAINTS ; OXYGEN
Language英语
Funding ProjectMajor 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]
Funding OrganizationMajor 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 ; 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-NNSA ; DOE-NNSA ; NSF ; NSF ; 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 ; 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 ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; 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 ; 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 ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; 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 ; 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 ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-BES, Division of Materials Sciences and Engineering ; DOE-NNSA ; DOE-NNSA ; NSF ; NSF ; DOE Office of Sci-ence ; DOE Office of Sci-ence
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000457300400010
PublisherMINERALOGICAL SOC AMER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90496
Collection地球与行星物理院重点实验室
Corresponding AuthorDeng, Liwei
Affiliation1.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
Recommended Citation
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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