Sound velocity and density measurements of solid iron alloys under high-pressure and high-temperature conditions

• Project/Area Number: 15K17784
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Tohoku University
• Principal Investigator: Shibazaki Yuki 東北大学, 学際科学フロンティア研究所, 助教 (10730830)
• Research Collaborator: NISHIDA Keisuke 東京大学, 大学院理学系研究科, 助教 (40530887)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 高温高圧 / 惑星中心核 / 鉄 / 弾性波速度 / 地球惑星内部 / 超音波法 / 金属物性 / 地球惑星内部構造

Outline of Final Research Achievements

Measurements of sound velocity and density of solid iron were carried out under high-pressure and high-temperature conditions in order to discuss the compositions of planetary cores. Sound velocities, P-wave and S-wave velocities, of bcc- and fcc-Fe decrease with increasing temperature at a given density. These results will play a key role in discussing the compositions of planetary cores such as the Earth and Mars.

Research Products

• [Journal Article] Pressure-induced structural change in MgSiO3 glass at pressures near the Earth’s core-mantle boundary (2018)
  • Author(s): Yoshio Kono, Yuki Shibazaki, Curtis Kenney-Benson, Yanbin Wang, Guoyin Shen
  • Journal Title: Proceedings of the National Academy of Sciences Volume: 115 Issue: 8 Pages: 1742-1747
  • DOI: 10.1073/pnas.1716748115
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The stability of anhydrous phase B, Mg14Si5O24, at mantle transition zone conditions. (2017)
  • Author(s): Yuan, L., Ohtani, E., Shibazaki, Y., Ozawa, S., Jin, Z., Suzuki, A., Frost, D.
  • Journal Title: Physics and Chemistry of Minerals, Volume: 43 Issue: 6 Pages: 1-9
  • DOI: 10.1007/s00269-017-0939-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Stability field of phase Egg, AlSiO₃OH at high pressure and high temperature: possible water reservoir in mantle transition zone (2017)
  • Author(s): K. Fukuyama, E. Ohtani, Y. Shibazaki, H. Kagi, and A. Suzuki
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 112 Issue: 1 Pages: 31-35
  • DOI: 10.2465/jmps.160719e
  • NAID: 130005461018
  • ISSN: 1345-6296, 1349-3825
  • Peer Reviewed / Open Access
• [Journal Article] Effect of Hydrogen on the Melting Temperature of Fe–FeS System at High Pressure (2016)
  • Author(s): Yuki Shibazaki, Vincenzo Stagno, Yingwei Fei, Yuji Higo
  • Journal Title: SPring-8/SACLA Research Report Volume: 4 Issue: 2 Pages: 181-184
  • DOI: 10.18957/rr.4.2.181
  • NAID: 130007969336
  • ISSN: 2187-6886
  • Year and Date: 2016-07-25
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Thermal equation of state of hcp‐iron: Constraint on the density deficit of Earth's solid inner core (2016)
  • Author(s): Yingwei Fei, Caitlin Murphy, Yuki Shibazaki, Anat Shahar, Haijun Huang
  • Journal Title: Geophysical Research Letters Volume: 43 Issue: 13 Pages: 6837-6843
  • DOI: 10.1002/2016gl069456
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Towards a consensus on the pressure and composition dependence of sound velocity in the liquid Fe-S system (2016)
  • Author(s): K. Nishida, A. Suzuki, H. Terasaki, Y. Shibazaki, Y. Higo, S. Kuwabara, Y. Shimoyama, M. Sakurai, M. Ushioda, E. Takahashi, T. Kikegawa, D. Wakabayashi, and N. Funamori
  • Journal Title: Physics of the Earth and Planetary Interiors Volume: 257 Pages: 230-239
  • DOI: 10.1016/j.pepi.2016.06.009
  • Peer Reviewed / Open Access
• [Journal Article] Compressional and shear wave velocities for polycrystalline bcc-Fe up to 6.3 GPa and 800 K (2016)
  • Author(s): Y. Shibazaki, K. Nishida, Y. Higo, M Igarashi, M. Tahara, T. Sakamaki, H. Terasaki, Y. Shimoyama, S. Kuwabara, Y. Takubo, E. Ohtani
  • Journal Title: American mineralogist Volume: 101 Issue: 5 Pages: 1150-1160
  • DOI: 10.2138/am-2016-5545
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ultrahigh-pressure polyamorphism in GeO2 glass with coordination number > 6 (2016)
  • Author(s): Yoshio Kono, Curtis Kenney-Benson, Daijo Ikuta, Yuki Shibazaki, Yanbin Wang, Guoyin Shen
  • Journal Title: Proceedings of the National Academy of Sciences Volume: 113 Issue: 13 Pages: 3436-3441
  • DOI: 10.1073/pnas.1524304113
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Sound velocity and elastic properties of Fe-Ni and Fe-Ni-C liquids at high pressure (2016)
  • Author(s): Soma Kuwabara, Hidenori Terasaki, Keisuke Nishida, Yuta Shimoyama, Yusaku Takubo, Yuji Higo, Yuki Shibazaki, Satoru Urakawa, Kentaro Uesugi, Akihisa Takeuchi, Tadashi Kondo
  • Journal Title: Physics and Chemistry of Minerals Volume: 43 Issue: 3 Pages: 229-236
  • DOI: 10.1007/s00269-015-0789-y
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Microscopic structural change in a liquid Fe-C alloy of ~5 GPa (2015)
  • Author(s): Yuki Shibazaki, Yoshio Kono, Yingwei Fei
  • Journal Title: Geophysical Research Letters Volume: 42 Issue: 13 Pages: 5236-5242
  • DOI: 10.1002/2015gl064271
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] X-ray imaging for studying behavior of liquids at high pressures and high temperatures using Paris-Edinburgh press (2015)
  • Author(s): Yoshio Kono, Curtis Kenney-Benson, Yuki Shibazaki, Changyong Park, Yanbin Wang, Guoyin Shen
  • Journal Title: Review of Scientific Instruments Volume: 86 Issue: 7 Pages: 0722071-8
  • DOI: 10.1063/1.4927227
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] High-pressure viscosity of liquid Fe and FeS revisited by falling sphere viscometry using ultrafast X-ray imaging (2015)
  • Author(s): Yoshio Kono, Curtis Kenney-Benson, Yuki Shibazaki, Changyong Park, Guoyin Shen, Yanbin Wang
  • Journal Title: Physics of the Earth and Planetary Interiors Volume: 241 Pages: 57-64
  • DOI: 10.1016/j.pepi.2015.02.006
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 高圧下における液体鉄系合金の局所構造測定とその軽元素依存性 (2017)
  • Author(s): 柴﨑裕樹，河野義生
  • Organizer: 第58回高圧討論会
• [Presentation] Structure measurement of liquid Fe-Si alloys at high pressure (2016)
  • Author(s): Yuki Shibazaki, Yoshio Kono
  • Organizer: AGU Fall Meeting 2016
  • Place of Presentation: Moscone Center, San Francisco, USA
  • Year and Date: 2016-12-12
  • Int'l Joint Research
• [Presentation] fcc-Feの弾性波速度に対する水素の効果 (2016)
  • Author(s): 柴﨑裕樹，西田圭佑, 戸邉宙, 阿部涼太, 鈴木昭夫, 寺﨑英紀, 下山裕太, 黒川冬華, 肥後祐司, 亀卦川卓美
  • Organizer: 第57回高圧討論会
  • Place of Presentation: 茨城県つくば市 筑波大学大学会館
  • Year and Date: 2016-10-26
• [Presentation] Melting relation in the Fe-S-Si system at 10 GPa: Implications for Mercury's core (2016)
  • Author(s): Hiromu Tobe, Akio Suzuki, Yuki Shibazaki, Tatsuya Sakamaki, Eiji Ohtani
  • Organizer: Goldschmidt 2016
  • Place of Presentation: 神奈川県横浜市 パシフィコ横浜
  • Year and Date: 2016-06-26
  • Int'l Joint Research
• [Presentation] Hydrogen solubility into Fe-alloys under high pressure (2016)
  • Author(s): Hidenori Terasaki, Yuki Shibazaki, Yuji Higo
  • Organizer: Japan Geoscience Union Meeting 2016
  • Place of Presentation: 千葉県千葉市 幕張メッセ
  • Year and Date: 2016-05-22
  • Int'l Joint Research / Invited
• [Presentation] The stability of Topaz-OH II in the mantle transition zone (2016)
  • Author(s): Abe Ryota, Akio Suzuki, Yuki Shibazaki, Shin Ozawa, Itaru Ohira, Eiji Ohtani
  • Organizer: Japan Geoscience Union Meeting 2016
  • Place of Presentation: 千葉県千葉市 幕張メッセ
  • Year and Date: 2016-05-22
  • Int'l Joint Research
• [Presentation] 超音波法による鉄水素化物の弾性波速度測定（を目指して） (2016)
  • Author(s): 柴崎裕樹、西田圭佑、肥後祐司、鈴木昭夫
  • Organizer: 第３回PRIUSシンポジウム
  • Place of Presentation: 愛媛県松山市 愛媛大学地球深部ダイナミクス研究センター
  • Year and Date: 2016-02-23
• [Presentation] 超音波法を用いた高温高圧下での固体鉄の弾性波速度・密度測定 (2015)
  • Author(s): 柴崎裕樹、西田圭佑、肥後祐司、五十嵐愛子、田原政紀、坂巻竜也、寺﨑英紀、下山裕太、田窪勇作、桑原壮馬、大谷栄治
  • Organizer: 第５６回高圧討論会
  • Place of Presentation: 広島県広島市 JMSアステールプラザ
  • Year and Date: 2015-11-10
• [Presentation] Sound velocity measurements of solid iron under high pressure and high temperature using an ultrasonic method (2015)
  • Author(s): Yuki Shibazaki, Keisuke Nishida, Yuji Higo, Mako Igarashi, Masaki Tahara, Tatsuya Sakamaki, Hidenori Terasaki, Yuta Shimoyama, Soma Kuwabara, Yusaku Takubo, Eiji Ohtani
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 千葉県千葉市 幕張メッセ
  • Year and Date: 2015-05-24
  • Int'l Joint Research