2017 Fiscal Year Final Research Report
Density and viscosity measurements of silicate melts under lower mantle conditions
Project/Area Number |
25287111
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Solid earth and planetary physics
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Research Institution | High Energy Accelerator Research Organization (2016-2017) The University of Tokyo (2013-2015) |
Principal Investigator |
Funamori Nobumasa 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 教授 (70306851)
|
Research Collaborator |
SATO Tomoko 広島大学, 大学院理学研究科, 准教授 (80553106)
WAKABAYASHI Daisuke 高エネルギー加速器研究機構, 物質構造科学研究所, 特別助教 (20759964)
|
Project Period (FY) |
2013-04-01 – 2018-03-31
|
Keywords | SiO2ガラス / 剪断流動 / 相転移中間状態 / 高圧実験 / 小角X線散乱 / X線吸収微細構造分光 / X線回折 / ケイ酸塩メルト |
Outline of Final Research Achievements |
High-pressure in-situ optical microscopy and small-angle X-ray scattering of SiO2 glass pressurized in diamond-anvil cells have clarified that (1) the structural change of the glass is phase-transition-like and the intermediate state consists of subnanometer-scale domains for low-pressure and high-pressure phases and (2) the densified fourfold-coordinated phase shows a very large shear flow under differential stresses. Our newly developed apparatuses (e.g., simultaneous small-angle X-ray scattering and X-ray diffraction system for diamond-anvil cells) are now used by other groups at the Photon Factory of KEK. Several papers are already published by these groups.
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Free Research Field |
高圧鉱物物理学
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