globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2021.116884
论文题名:
Thermal expansion of liquid Fe-S alloy at high pressure
作者: Xu F.; Morard G.; Guignot N.; Rivoldini A.; Manthilake G.; Chantel J.; Xie L.; Yoneda A.; King A.; Boulard E.; Pandolfi S.; Ryerson F.J.; Antonangeli D.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 563
语种: 英语
中文关键词: crystallization regime ; density ; high pressure and temperature ; liquid iron-sulfur alloys ; telluric planetary cores ; thermal expansion
英文关键词: Density (specific gravity) ; Iron alloys ; Iron compounds ; Liquids ; Sulfur compounds ; Temperature ; Bottom up ; Crystallization regimes ; Density ; High pressure ; High-pressure and temperatures ; Liquid iron-sulphur alloy ; Liquidus ; Local structure ; Telluric planetary core ; Thermal ; Thermal expansion ; adiabatic process ; alloy ; asteroid ; astronomy ; crystallization ; experimental study ; Ganymede ; high pressure ; inner core ; iron ; Moon ; P-T conditions ; sulfur ; thermal expansion ; X-ray diffraction ; Asteroidea
英文摘要: Local structure and density of liquid Fe-S alloys at high pressure have been determined in situ by combined angle and energy dispersive X-ray diffraction experiments in a multi-anvil apparatus, covering a large temperature and compositional range. Precise density measurements collected for increasing temperature allowed us to directly derive the thermal expansion coefficients for liquid Fe-S alloys as a function of composition. In turn, thermal expansion has been used to refine thermodynamic models and to address the crystallization regime of telluric planetary cores by comparing the adiabatic temperature gradient and the slope of the liquidus in the Fe-FeS system. For Fe-S cores of asteroids and small planetesimals, top-down solidification is the dominant scenario as the compositional domain for which the slope of the liquidus is greater than the adiabatic gradient is limited to a narrow portion on the Fe-rich side. However, bottom-up growth of the inner core is expected for S-poor cases, with this compositional domain expanding to more S-rich compositions with increasing pressure (size of the planetary body). In particular, bottom-up crystallization cannot be excluded for the Moon and Ganymede. © 2021 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165722
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作者单位: Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, Paris, 75005, France; Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, Grenoble, 38000, France; Synchrotron SOLEIL, L'Orme de Merisiers, Saint Aubin-BP48, Gif-sur-Yvette, 91192, France; Royal Observatory of Belgium, Avenue Circulaire 3, Brussels, B-1180, Belgium; Laboratoire Magmas et Volcans CNRS, IRD, OPGC, Université Clermont Auvergne, Clermont-Ferrand, 63000, France; Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207, UMET - Unité Matériaux et Transformations, Lille, F-59000, France; Institute for Planetary Materials, Okayama University, Misasa, Tottori 682-0193, Japan; Department of Earth and Space Science, Graduate School for Science, Osaka University, Toyonaka, Osaka 560-0043, Japan; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550-9698, United States

Recommended Citation:
Xu F.,Morard G.,Guignot N.,et al. Thermal expansion of liquid Fe-S alloy at high pressure[J]. Earth and Planetary Science Letters,2021-01-01,563
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