研究者総覧

河野 義生 (コウノ ヨシオ)

  • 地球深部ダイナミクス研究センター 准教授
Last Updated :2020/09/17

研究者情報

学位

  • 博士(学術)(横浜国立大学)

科研費研究者番号

  • 20452683

ORCID ID

J-Global ID

研究キーワード

  • 粘性   弾性波速度   ガラス   マグマ   高圧   

研究分野

  • 自然科学一般 / 固体地球科学 / 高圧地球科学

経歴

  • 2018年07月 - 現在  愛媛大学地球深部ダイナミクス研究センター准教授
  • 2012年07月 - 2018年06月  Carnegie Institution of Washington,Geophysical Laboratory, HPCAT,Beamline Scientist
  • 2011年04月 - 2012年06月  Carnegie Institution of Washington,Geophysical Laboratory, HPCAT,Research Scientist
  • 2009年04月 - 2011年03月  愛媛大学地球深部ダイナミクス研究センターグローバルCOE助教
  • 2008年11月 - 2009年03月  愛媛大学地球深部ダイナミクス研究センターグローバルCOE研究員
  • 2008年04月 - 2008年10月  愛媛大学地球深部ダイナミクス研究センター日本学術振興会特別研究員PD
  • 2006年04月 - 2008年03月  愛媛大学地球深部ダイナミクス研究センター研究機関研究員

学歴

  • 2003年04月 - 2006年03月   横浜国立大学   環境情報学府   博士後期課程

研究活動情報

論文

  • Yuki Shibazaki, Rui Yamada, Junji Saida, Yoshio Kono, Masato Wakeda, Keiji Itoh, Masahiko Nishijima, Koji Kimoto
    Communications Materials 2020年12月 [査読有り]
     研究論文(学術雑誌)
  • Yu Shu, Yoshio Kono, Itaru Ohira, Rostislav Hrubiak, Curtis Kenney-Benson, Maddury Somayazulu, Nenad Velisavljevic, Guoyin Shen
    The Journal of Physical Chemistry B 2020年07月 [査読有り]
     研究論文(学術雑誌)
  • Blake T. Sturtevant, Nenad Velisavljevic, Dipen N. Sinha, Yoshio Kono, Cristian Pantea
    Review of Scientific Instruments 2020年07月 [査読有り]
     研究論文(学術雑誌)
  • Gréaux, S., Zhou, Y., Kono, Y., Yamada, A., Higo, Y., Irifune, T.
    Minerals 10 3 2020年 [査読有り]
     研究論文(学術雑誌)
  • Stagno, V., Stopponi, V., Kono, Y., D’arco, A., Lupi, S., Romano, C., Poe, B.T., Foustoukos, D.I., Scarlato, P., Manning, C.E.
    Minerals 10 3 2020年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Kenney-Benson, C., Shen, G.
    High Pressure Research 2020年 [査読有り]
     研究論文(学術雑誌)
  • Shu, Y., Kono, Y., Ohira, I., Li, Q., Hrubiak, R., Park, C., Kenney-Benson, C., Wang, Y., Shen, G.
    Journal of Physical Chemistry Letters 11 2 2020年 [査読有り]
     研究論文(学術雑誌)
  • Mingqiang Hou, Qian Zhang, Renbiao Tao, Hong Liu, Yoshio Kono, Ho-kwang Mao, Wenge Yang, Bin Chen, Yingwei Fei
    Nature Communications 10 1 2019年12月 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y.
    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu 29 2 86 - 93 2019年 [査読有り]
     研究論文(学術雑誌)
  • Ohira, I., Kono, Y., Shibazaki, Y., Kenney-Benson, C., Masuno, A., Shen, G.
    Geochemical Perspectives Letters 10 41 - 45 2019年 [査読有り]
     研究論文(学術雑誌)
  • Shibazaki, Y., Kono, Y.
    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu 29 2 103 - 112 2019年 [査読有り]
     研究論文(学術雑誌)
  • Anzures, B.A., Watson, H.C., Kono, Y., Yu, T., Wang, Y.
    High Pressure Research 39 3 438 - 456 2019年 [査読有り]
     研究論文(学術雑誌)
  • Shibazaki, Y., Kono, Y., Shen, G.
    Scientific Reports 9 1 2019年 [査読有り]
     研究論文(学術雑誌)
  • Wilding, M., Bingham, P.A., Wilson, M., Kono, Y., Drewitt, J.W.E., Brooker, R.A., Parise, J.B.
    Scientific Reports 9 1 2019年 [査読有り]
     研究論文(学術雑誌)
  • Liu, J., Dorfman, S.M., Lv, M., Li, J., Zhu, F., Kono, Y.
    Geochemical Perspectives Letters 11 2019年 [査読有り]
     研究論文(学術雑誌)
  • Yu, T., Prescher, C., Ryu, Y.J., Shi, F., Greenberg, E., Prakapenka, V., Eng, P., Stubbs, J., Kono, Y., Shen, G., Watson, H., Rivers, M.L., Sutton, S.R., Wang, Y.
    Minerals 9 11 2019年 [査読有り]
     研究論文(学術雑誌)
  • Terasaki, H., Nishida, K., Urakawa, S., Takubo, Y., Kuwabara, S., Shimoyama, Y., Uesugi, K., Kono, Y., Takeuchi, A., Suzuki, Y., Higo, Y., Kondo, T.
    Comptes Rendus - Geoscience 351 2-3 163 - 170 2019年 [査読有り]
     研究論文(学術雑誌)
  • Deng, L., Kono, Y., Shen, G.
    American Mineralogist 104 2 291 - 299 2019年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Yoshio
    Magmas Under Pressure 261 - 280 2018年 [査読有り]
  • Hudspeth, J., Sanloup, C., Kono, Y.
    Geochemical Perspectives Letters 7 04, 2018 17 - 21 2018年 [査読有り]
     研究論文(学術雑誌)
  • Ham, Kathryn J, Kono, Yoshio, Patel, Parimal J, Kilczewski, Steven M, Vohra, Yogesh K
    Materials 11 1 114 - 114 2018年 [査読有り]
     研究論文(学術雑誌)
  • Yoshio Kono, Yuki Shibazaki, Curtis Kenney-Benson, Yanbin Wang, Guoyin Shen
    Proceedings of the National Academy of Sciences 115 8 1742 - 1747 Proceedings of the National Academy of Sciences 2018年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Sanloup, C.
    Magmas Under Pressure: Advances in High-Pressure Experiments on Structure and Properties of Melts 2018年 [査読有り]
     研究論文(学術雑誌)
  • Shibazaki, Y., Kono, Y.
    Journal of Geophysical Research: Solid Earth 123 6 4697 - 4706 2018年 [査読有り]
     研究論文(学術雑誌)
  • Stagno V, Stopponi V, Kono Y, Manning C.E, Irifune T
    Chemical Geology 501 19 - 25 2018年 [査読有り]
     研究論文(学術雑誌)
  • Magnus J. Lipp, Zs. Jenei, H. Cynn, Y. Kono, C. Park, C. Kenney-Benson, W. J. Evans
    Nature Communications 8 1 Springer Nature 2017年12月 [査読有り]
     研究論文(学術雑誌) 
    The behavior of the f-electrons in the lanthanides and actinides governs important macroscopic properties but their pressure and temperature dependence is not fully explored. Cerium with nominally just one 4f electron offers a case study with its iso-structural volume collapse from the gamma-phase to the alpha-phase ending in a critical point (p(C), V-C, T-C), unique among the elements, whose mechanism remains controversial. Here, we present longitudinal (c(L)) and transverse sound speeds (c(T)) versus pressure from higher than room temperature to T-C for the first time. While c(L) experiences a non-linear dip at the volume collapse, c(T) shows a step-like change. This produces very peculiar macroscopic properties: the minimum in the bulk modulus becomes more pronounced, the step-like increase of the shear modulus diminishes and the Poisson's ratio becomes negative-meaning that cerium becomes auxetic. At the critical point itself cerium lacks any compressive strength but offers resistance to shear.
  • Nick Dygert, Jung‐Fu Lin, Edward W. Marshall, Yoshio Kono, James E. Gardner
    Geophysical Research Letters 44 22 11,282 - 11,291 2017年11月 [査読有り]
     研究論文(学術雑誌)
  • B. Cochain, C. Sanloup, C. Leroy, Y. Kono
    Geophysical Research Letters 44 2 818 - 826 2017年01月 [査読有り]
     研究論文(学術雑誌) 
    While it is accepted that silica-rich melts behave anomalously with a decrease of their viscosity at increased pressures (P), the viscosity of silica-poor melts is much less constrained. However, modeling of mantle melts dynamics throughout Earth's history, including the magma ocean era, requires precise knowledge of the viscous properties of silica-poor magmas. We extend here our previous measurements on fayalite melt to natural end-members pyroxenite melts (MgSiO3 and CaSiO3) using in situ X-ray radiography up to 8GPa. For all compositions, viscosity decreases with P, rapidly below 5GPa and slowly above. The magnitude of the viscosity decrease is larger for pyroxene melts than for fayalite melt and larger for the Ca end-member within pyroxene melts. The anomalous viscosity decrease appears to be a universal behavior for magmas up to 13GPa, while the P dependence of viscosity beyond this remains to be measured. These results imply that mantle melts are very pervasive at depth.
  • Ham, K.J., Vohra, Y.K., Kono, Y., Wereszczak, A.A., Patel, P.
    High Pressure Research 37 2 233 - 243 2017年 [査読有り]
     研究論文(学術雑誌) 
    Multi-angle energy-dispersive X-ray diffraction studies and white-beam X-ray radiography were conducted with a cylindrically shaped (1mm diameter and 0.7mm high) high-boron-content borosilicate glass sample (17.6% B2O3) to a pressure of 13.7GPa using a Paris-Edinburgh (PE) press at Beamline 16-BM-B, HPCAT of the Advanced Photon Source. The measured structure factor S(q) to large q=19 angstrom(-1) is used to determine information about the internuclear bond distances between various species of atoms within the glass sample. Sample pressure was determined with gold as a pressure standard. The sample height as measured by radiography showed an overall uniaxial compression of 22.5% at 13.7GPa with 10.6% permanent compaction after decompression to ambient conditions. The reduced pair distribution function G(r) was extracted and Si-O, O-O and Si-Si bond distances were measured as a function of pressure. Raman spectroscopy of the pressure recovered sample as compared to starting material showed blue-shift and changes in intensity and widths of Raman bands associated with silicate and four-coordinated boron.
  • Jacobsen, M.K., Velisavljevic, N., Kono, Y., Park, C., Kenney-Benson, C.
    Physical Review B 95 13 2017年 [査読有り]
     研究論文(学術雑誌) 
    Evidence in support of a shear driven anomaly in zirconium at elevated temperatures and pressures has been determined through the combined use of ultrasonic, diffractive, and radiographic techniques. Implications that these have on the phase diagram are explored through thermoacoustic parameters associated with the elasticity and thermal characteristics. In particular, our results illustrate a deviating phase boundary between the a and. phases, referred to as a kink, at elevated temperatures and pressures. Further, pair distribution studies of this material at more extreme temperatures and pressures illustrate the scale on which diffusion takes place in this material. Possible interpretation of these can be made through inspection of shear-driven anomalies in other systems.
  • Zeng, Q., Zeng, Z., Lou, H., Kono, Y., Zhang, B., Kenney-Benson, C., Park, C., Mao, W.L.
    Applied Physics Letters 110 22 2017年 [査読有り]
     研究論文(学術雑誌) 
    The pressure-induced transitions discovered in metallic glasses (MGs) have attracted considerable research interest offering an exciting opportunity to study polyamorphism in densely packed systems. Despite the large body of work on these systems, the elastic properties of the MGs during polyamorphic transitions remain unclear. Here, using an in situ high-pressure ultrasonic sound velocity technique integrated with x-ray radiography and x-ray diffraction in a Paris-Edinburgh cell, we accurately determined both the compressional and shear wave velocities of a polyamorphous Ce68Al10Cu20Co2 MG up to 5.8 GPa. We observed elastic anomalies of a MG with minima (at similar to 1.5 GPa) in the sound velocities, bulk modulus, and Poisson's ratio during its polyamorphic transition. This behavior was discussed in comparison to the elastic anomalies of silica glass and crystalline Ce. Published by AIP Publishing.
  • de Grouchy, C.J.L., Sanloup, C., Cochain, B., Drewitt, J.W.E., Kono, Y., Crépisson, C.
    Earth and Planetary Science Letters 464 155 - 165 2017年 [査読有り]
     研究論文(学術雑誌) 
    The structure of two Lu doped (4000 ppm) model end member silicate liquids, a highly polymerised haplogranite (Si-Al-Na-K-O) and a less polymerised anorthite-diopside (Si-Al-Mg-Ca-O), have been studied up to 8 GPa using in situx-ray diffraction techniques. The results are the first to identify trace rare Earth element incorporation in silicate melts at high pressure. At pressures below 5 GPa, the bonding environment of Lu-O was found to be dependent on composition with coordination number CNLu-O=8and bond distance r(Lu-O)=2.36 angstrom in the haplogranite melt, decreasing to CNLu-O = 6 and r(Lu-O) = 2.29 angstrom in the anorthite-diopside melt. This compositional variance in coordination number at low pressure is consistent with observations made for Y-O in glasses at ambient conditions and is coincident with a dramatic increase in the partition coefficients previously observed for rare Earth elements with increasing melt polymerisation. With increasing pressure we find that CNLu-O and r(Lu-O) remain constant in the haplogranite melt. However, an abrupt change in both Lu-O coordination and bond distance is observed at 5 GPa in the anorthite-diopside melt, with CNLu-O increasing from 6 to 8-fold and r(Lu-O) from 2.29 to 2.39 angstrom. This occurs over a similar pressure range where a change in the P-dependence in the reported rare Earth element partition coefficients is observed for garnet-, clinopyroxene-, and olivine-melt systems. This work shows that standard models for predicting trace elements at depth must incorporate the effect of pressure-induced structural transformations in the melt in order to realistically predict partitioning behaviour. (C) 2017 Elsevier B.V. All rights reserved.
  • Shu, Y., Yu, D., Hu, W., Wang, Y., Shen, G., Kono, Y., Xu, B., He, J., Liu, Z., Tian, Y.
    Proceedings of the National Academy of Sciences of the United States of America 114 13 3375 - 3380 2017年 [査読有り]
     研究論文(学術雑誌) 
    As an archetypal semimetal with complex and anisotropic Fermi surface and unusual electric properties (e.g., high electrical resistance, large magnetoresistance, and giant Hall effect), bismuth (Bi) has played a critical role in metal physics. In general, Bi displays diamagnetism with a high volumetric susceptibility (similar to 10(-4)). Here, we report unusual ferromagnetism in bulk Bi samples recovered from a molten state at pressures of 1.4-2.5 GPa and temperatures above similar to 1,250 K. The ferromagnetism is associated with a surprising structural memory effect in the molten state. On heating, low-temperature Bi liquid (L) transforms to a more randomly disordered high-temperature liquid (L') around 1,250 K. By cooling from above 1,250 K, certain structural characteristics of liquid L' are preserved in L. Bi clusters with characteristics of the liquid L' motifs are further preserved through solidification into the Bi-II phase across the pressure-independent melting curve, which may be responsible for the observed ferromagnetism.
  • Hu, Meng, He, Julong, Zhao, Zhisheng, Strobel, Timothy A., Hu, Wentao, Yu, Dongli, Sun, Hao, Liu, Lingyu, Li, Zihe, Ma, Mengdong, Kono, Yoshio, Shu, Jinfu, Mao, Ho-kwang, Fei, Yingwei, Shen, Guoyin, Wang, Yanbin, Juhl, Stephen J., Huang, Jian Yu, Liu, Zhongyuan, Xu, Bo, Tian, Yongjun
    Science Advances 3 6 2017年 [査読有り]
     研究論文(学術雑誌) 
    Carbon's unique ability to have both sp(2) and sp(3) bonding states gives rise to a range of physical attributes, including excellent mechanical and electrical properties. We show that a series of lightweight, ultrastrong, hard, elastic, and conductive carbons are recovered after compressing sp(2)-hybridized glassy carbon at various temperatures. Compression induces the local buckling of graphene sheets through sp(3) nodes to form interpenetrating graphene networks with long-range disorder and short-range order on the nanometer scale. The compressed glassy carbons have extraordinary specific compressive strengths-more than two times that of commonly used ceramics-and simultaneously exhibit robust elastic recovery in response to local deformations. This type of carbon is an optimal ultralight, ultrastrong material for a wide range of multifunctional applications, and the synthesis methodology demonstrates potential to access entirely new metastable materials with exceptional properties.
  • Lin, C., Smith, J.S., Sinogeikin, S.V., Kono, Y., Park, C., Kenney-Benson, C., Shen, G.
    Nature Communications 8 2017年 [査読有り]
     研究論文(学術雑誌) 
    A metastable liquid may exist under supercooling, sustaining the liquid below the melting point such as supercooled water and silicon. It may also exist as a transient state in solid-solid transitions, as demonstrated in recent studies of colloidal particles and glass-forming metallic systems. One important question is whether a crystalline solid may directly melt into a sustainable metastable liquid. By thermal heating, a crystalline solid will always melt into a liquid above the melting point. Here we report that a high-pressure crystalline phase of bismuth can melt into a metastable liquid below the melting line through a decompression process. The decompression-induced metastable liquid can be maintained for hours in static conditions, and transform to crystalline phases when external perturbations, such as heating and cooling, are applied. It occurs in the pressure-temperature region similar to where the supercooled liquid Bi is observed. Akin to supercooled liquid, the pressure-induced metastable liquid may be more ubiquitous than we thought.
  • Lai, X., Chen, B., Wang, J., Kono, Y., Zhu, F.
    Journal of Geophysical Research: Solid Earth 122 12 9745 - 9754 2017年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Kenney-Benson, C., Ikuta, D., Shibazaki, Y., Wang, Y., Shen, G., Navrotsky, A.
    Proceedings of the National Academy of Sciences of the United States of America 113 13 3436 - 3441 2016年 [査読有り]
     研究論文(学術雑誌) 
    Knowledge of pressure-induced structural changes in glasses is important in various scientific fields as well as in engineering and industry. However, polyamorphism in glasses under high pressure remains poorly understood because of experimental challenges. Here we report new experimental findings of ultrahigh-pressure polyamorphism in GeO2 glass, investigated using a newly developed double-stage large-volume cell. The Ge-O coordination number (CN) is found to remain constant at similar to 6 between 22.6 and 37.9 GPa. At higher pressures, CN begins to increase rapidly and reaches 7.4 at 91.7 GPa. This transformation begins when the oxygen-packing fraction in GeO2 glass is close to the maximal dense-packing state (the Kepler conjecture = similar to 0.74), which provides new insights into structural changes in network-forming glasses and liquids with CN higher than 6 at ultrahigh-pressure conditions.
  • Ikuta, D., Kono, Y., Shen, G.
    Journal of Applied Physics 120 13 2016年 [査読有り]
     研究論文(学術雑誌) 
    The structure of liquid aluminum is measured up to 6.9GPa and 1773K using a multi-angle energy-dispersive X-ray diffraction method in a Paris-Edinburgh press. The effect of pressure and temperature on the structure and density of liquid aluminum is analyzed by means of the hard sphere model. Peak positions in the structure factor of liquid aluminum show a nearly constant value with varying temperatures at similar to 1-2 GPa and slightly change with varying pressures up to 6.9GPa at 1173-1773K. In contrast, the height of the first peak in the structure factor significantly changes with varying pressures and temperatures. Hard sphere model analysis shows that the structure of liquid aluminum in the pressure-temperature range of this study is controlled mostly by the packing fraction with only a minor change in hard sphere diameters. The obtained packing fractions and hard sphere diameters are used to calculate densities of liquid aluminum at high pressure-temperature conditions. Published by AIP Publishing.
  • Gréaux, S., Kono, Y., Wang, Y., Yamada, A., Zhou, C., Jing, Z., Inoue, T., Higo, Y., Irifune, T., Sakamoto, N., Yurimoto, H.
    Geophysical Research Letters 43 9 4239 - 4246 2016年 [査読有り]
     研究論文(学術雑誌) 
    The elasticity of Al-bearing stishovite with 1.0, 3.3, and 4.5wt% Al2O3 was investigated in the multianvil apparatus at high pressures and temperatures up to 21GPa and 1700 K, by ultrasonic interferometry in conjunction with in situ X-ray techniques. The moduli K-S and G are found to decrease with increasing Al2O3 content, while their pressure and temperature derivatives do not change in a significant manner for 1.0 and 3.3 wt% Al2O3. The temperature derivatives for 4.5 wt% Al2O3, however, are larger, which may result from a change in the Al substitution mechanism at high Al2O3 content. It is shown that acoustic velocities of any mid-ocean ridge basalt are lower by -0.4% than those calculated from pure stishovite data. Velocity perturbations up to -3.4% (V-P) and -4.2% (VS) in subducted slabs are explained by the combination of the thermal equilibration (Delta T similar to 600 K) of the slab and Al enrichment in stishovite.
  • Ikuta, D., Kono, Y., Shen, G.
    High Pressure Research 36 4 533 - 548 2016年 [査読有り]
     研究論文(学術雑誌) 
    Pressure and temperature dependence of the structure of liquid Sn has been measured up to 5.3GPa and 1373K using multi-angle energy-dispersive X-ray diffraction in Paris-Edinburgh cell. Under nearly isobar condition at approximate to 1GPa, liquid Sn displays a normal behavior with gradual structural changes with temperature up to 1373K. Under isothermal compressions at 850 and 1373K, however, the structure factors of liquid Sn both show a turn-over at approximate to 3GPa in the height of the first diffraction peak. According to the hard sphere cluster model, the structure of liquid Sn may be viewed as two different types of clusters. Below approximate to 3GPa, it is shown that the packing fraction of the dominant cluster (occupying approximate to 0.94 fraction) changes with compression, while above approximate to 3GPa, the packing fractions and the hard sphere diameters of both clusters start to influence the structure, causing significant changes with increasing pressure. Our results suggest that the compression behavior of liquid Sn changes from localized densification only in one cluster below approximate to 3GPa to homogeneous structural changes in both clusters above approximate to 3GPa.
  • Lin, C., Smith, J.S., Sinogeikin, S.V., Park, C., Kono, Y., Kenney-Benson, C., Rod, E., Shen, G.
    Journal of Applied Physics 119 4 2016年 [査読有り]
     研究論文(学術雑誌) 
    Kinetics of the B1-B2 phase transition in KCl has been investigated under various compression rates (0.03-13.5 GPa/s) in a dynamic diamond anvil cell using time-resolved x-ray diffraction and fast imaging. Our experimental data show that the volume fraction across the transition generally gives sigmoidal curves as a function of pressure during rapid compression. Based upon classical nucleation and growth theories (Johnson-Mehl-Avrami-Kolmogorov theories), we propose a model that is applicable for studying kinetics for the compression rates studied. The fit of the experimental volume fraction as a function of pressure provides information on effective activation energy and average activation volume at a given compression rate. The resulting parameters are successfully used for interpreting several experimental observables that are compression-rate dependent, such as the transition time, grain size, and over-pressurization. The effective activation energy (Q(eff)) is found to decrease linearly with the logarithm of compression rate. When Q(eff) is applied to the Arrhenius equation, this relationship can be used to interpret the experimentally observed linear relationship between the logarithm of the transition time and logarithm of the compression rates. The decrease of Q(eff) with increasing compression rate results in the decrease of the nucleation rate, which is qualitatively in agreement with the observed change of the grain size with compression rate. The observed over-pressurization is also well explained by the model when an exponential relationship between the average activation volume and the compression rate is assumed. VC 2016 AIP Publishing LLC.
  • Rosa, A.D., Pohlenz, J., de Grouchy, C., Cochain, B., Kono, Y., Pasternak, S., Mathon, O., Irifune, T., Wilke, M.
    High Pressure Research 36 3 332 - 347 2016年 [査読有り]
     研究論文(学術雑誌) 
    We review recent progress in studying structural properties of liquids using X-ray absorption spectroscopy coupled with the Paris-Edinburgh press at third-generation synchrotron facilities. This experimental method allows for detecting subtle changes in atomic arrangements of melts over a wide pressure-temperature range. It has been also employed to monitor variations of the local coordination environment of diluted species contained in glasses, liquids and crystalline phases as a function of the pressure and temperature. Such information is of great importance for gaining deeper insights into the physico-chemical properties of liquids at extreme condition, including the understanding of such phenomena as liquid-liquid phase transitions, viscosity drops and various transport properties of geological melts. Here, we describe the experimental approach and discuss its potential in structural characterization on selected scientific highlights. Finally, the current ongoing instrumental developments and future scientific opportunities are discussed.
  • Zeng, Q., Lin, Y., Liu, Y., Zeng, Z., Shi, C.Y., Zhang, B., Lou, H., Sinogeikin, S.V., Kono, Y., Kenney-Benson, C., Park, C., Yang, W., Wang, W., Shenga, H., Mao, H.-K., Mao, W.L.
    Proceedings of the National Academy of Sciences of the United States of America 113 7 1714 - 1718 2016年 [査読有り]
     研究論文(学術雑誌) 
    Metallic glass (MG) is an important new category of materials, but very few rigorous laws are currently known for defining its "disordered" structure. Recently we found that under compression, the volume (V) of an MG changes precisely to the 2.5 power of its principal diffraction peak position (1/q(1)). In the present study, we find that this 2.5 power law holds even through the first-order polyamorphic transition of a Ce68Al10Cu20Co2 MG. This transition is, in effect, the equivalent of a continuous "composition" change of 4f-localized "big Ce" to 4f-itinerant "small Ce," indicating the 2.5 power law is general for tuning with composition. The exactness and universality imply that the 2.5 power law may be a general rule defining the structure of MGs.
  • Shibazaki Y, Kono Y, Fei Y
    Geophysical Research Letters 42 13 5236 - 5242 2015年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Kenney-Benson, C., Shibazaki, Y., Park, C., Shen, G., Wang, Y.
    Physics of the Earth and Planetary Interiors 241 57 - 64 2015年 [査読有り]
     研究論文(学術雑誌)
  • Harada, Y., Katayama, I., Kono, Y.
    Japanese Magazine of Mineralogical and Petrological Sciences 43 5 161 - 173 2015年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Kenney-Benson, C., Shibazaki, Y., Park, C., Wang, Y., Shen, G.
    Review of Scientific Instruments 86 7 2015年 [査読有り]
     研究論文(学術雑誌)
  • Spice, H., Sanloup, C., Cochain, B., de Grouchy, C., Kono, Y.
    Geochimica et Cosmochimica Acta 148 219 - 227 2015年 [査読有り]
     研究論文(学術雑誌)
  • Zhao, Z., Wang, E.F., Yan, H., Kono, Y., Wen, B., Bai, L., Shi, F., Zhang, J., Kenney-Benson, C., Park, C., Wang, Y., Shen, G.
    Nature Communications 6 2015年 [査読有り]
     研究論文(学術雑誌)
  • Zeng, Q., Kono, Y., Lin, Y., Zeng, Z., Wang, J., Sinogeikin, S.V., Park, C., Meng, Y., Yang, W., Mao, H.-K., Mao, W.L.
    Physical Review Letters 112 18 2014年 [査読有り]
     研究論文(学術雑誌) 
    As a fundamental property of a material, density is controlled by the interatomic distances and the packing of microscopic constituents. The most prominent atomistic feature in a metallic glass (MG) that can be measured is its principal diffraction peak position (q(1)) observable by x-ray, electron, or neutron diffraction, which is closely associated with the average interatomic distance in the first shell. Density (and volume) would naturally be expected to vary under compression in proportion to the cube of the one-dimensional interatomic distance. However, by using high pressure as a clean tuning parameter and high-resolution in situ techniques developed specifically for probing the density of amorphous materials, we surprisingly found that the density of a MG varies with the 5/2 power of q(1), instead of the expected cubic relationship. Further studies of MGs of different compositions repeatedly produced the same fractional power law of 5/2 in all three MGs we investigated, suggesting a universal feature in MG.
  • Kono, Y., Kenney-Benson, C., Hummer, D., Ohfuji, H., Park, C., Shen, G., Wang, Y., Kavner, A., Manning, C.E.
    Nature Communications 5 2014年 [査読有り]
     研究論文(学術雑誌) 
    Knowledge of the occurrence and mobility of carbonate-rich melts in the Earth's mantle is important for understanding the deep carbon cycle and related geochemical and geophysical processes. However, our understanding of the mobility of carbonate-rich melts remains poor. Here we report viscosities of carbonate melts up to 6.2 GPa using a newly developed technique of ultrafast synchrotron X-ray imaging. These carbonate melts display ultralow viscosities, much lower than previously thought, in the range of 0.006-0.010 Pa s, which are similar to 2 to 3 orders of magnitude lower than those of basaltic melts in the upper mantle. As a result, the mobility of carbonate melts (defined as the ratio of melt-solid density contrast to melt viscosity) is similar to 2 to 3 orders of magnitude higher than that of basaltic melts. Such high mobility has significant influence on several magmatic processes, such as fast melt migration and effective melt extraction beneath mid-ocean ridges.
  • Kono, Y., Park, C., Kenney-Benson, C., Shen, G., Wang, Y.
    Physics of the Earth and Planetary Interiors 228 269 - 280 2014年 [査読有り]
     研究論文(学術雑誌) 
    Techniques for measuring liquid structure, elastic wave velocity, and viscosity under high pressure have been integrated using a Paris-Edinburgh cell at Beamline 16-BM-B, HPCAT of the Advanced Photon Source. The Paris-Edinburgh press allows for compressing large volume samples (up to 2 mm in both diameter and length) up to similar to 7 GPa and 2000 degrees C. Multi-angle energy dispersive X-ray diffraction provides structure factors of liquid to a large Q of similar to 19 angstrom. Ultrasonic techniques have been developed to investigate elastic wave velocity of liquids combined with the X-ray imaging. Falling sphere viscometry, using highspeed X-ray radiography (>1000 frames/s), enables us to investigate a wide range of viscosity, from those of high viscosity silicates or oxides melts to low viscosity (<1 mPa s) liquids and fluids such as liquid metals or salts. The integration of these multiple techniques has promoted comprehensive studies of structure and physical properties of liquids as well as amorphous materials at high pressures and high temperatures, making it possible to investigate correlations between structure and physical properties of liquids in situ. (C) 2013 Elsevier B.V. All rights reserved.
  • Jing, Z., Wang, Y., Kono, Y., Yu, T., Sakamaki, T., Park, C., Rivers, M.L., Sutton, S.R., Shen, G.
    Earth and Planetary Science Letters 396 78 - 87 2014年 [査読有り]
     研究論文(学術雑誌) 
    Sound velocities of Fe and Fe-S liquids were determined by combining the ultrasonic measurements and synchrotron X-ray techniques under high pressure-temperature conditions from 1 to 8 GPa and 1573 K to 1973 K. Four different liquid compositions were studied including Fe, Fe-10 wt% S, Fe-20 wt% 5, and Fe-27 wt% S. Our data show that the velocity of Fe-rich liquids increases upon compression and decreases with increasing sulfur content, whereas temperature has negligible effect on the velocity of Fe-S liquids. The sound velocity data were combined with ambient-pressure densities to fit the Mumaghan equation of state (EOS). Compared to the lunar seismic model, our velocity data constrain the sulfur content at 4 3 wt%, indicating a significantly denser (6.5 +/- 0.5 g/cm(3)) and hotter (1870(-70)(+100) K) outer core than previously estimated. A new lunar structure model incorporating available geophysical observations points to a smaller core radius. Our model suggests a top-down solidification scenario for the evolution of the lunar core. Such "iron snow" process may have been an important mechanism for the growth of the inner core. (C) 2014 Elsevier B.V. All rights reserved.
  • J. Baker, R. Kumar, N. Velisavljevic, C. Park, C. Kenney-Benson, Y. Kono, A. Cornelius, Y. Zhao
    18TH APS-SCCM AND 24TH AIRAPT, PTS 1-19 500 PART 14 2014年 [査読有り]
     研究論文(国際会議プロシーディングス) 
    We have established a new type of experimental set-up utilizing a Paris-Edinburgh (PE) type large volume press with a dedicated sample cell assembly for simultaneous x-ray diffraction, electrical resistance, and temperature gradient measurements at the High-Pressure Collaborative Access Team (HPCAT) at Advanced Photon Source (APS), Argonne National Laboratory 16BM-B beamline. We demonstrate the feasibility of performing in situ measurements and correlating the measured electrical-thermal-structural properties over a broad range of P-T conditions by observing the well-known solid-solid and solid-melt transitions of bismuth (Bi) up to 5 GPa and 600 degrees C. The goal of developing this new multi-probe measurement capability is to further improve detection of the onset of solid-solid and solid-melt transitions, relate structural and electrical properties of materials, determine changes in thermal conductivity at high P-T, and ultimately extend the technique for investigating other parameters, such as the Seebeck coefficient of thermoelectric materials.
  • M. J. Lipp, Zs Jenei, D. Ruddle, C. Aracne-Ruddle, H. Cynn, W. J. Evans, Y. Kono, C. Kenney-Benson, C. Park
    18TH APS-SCCM AND 24TH AIRAPT, PTS 1-19 500 PART 3 2014年 [査読有り]
     研究論文(国際会議プロシーディングス) 
    A pressure-volume isotherm in cerium metal at 1100 K was measured in a large volume press of the Paris-Edinburgh type up to 6 GPa. The volume was determined by imaging a rectangular shape of the sample via white X-ray radiography. Energy dispersive x-ray diffraction spectra were recorded to ensure that the highly reactive cerium in the cell assembly remained pure at this temperature. Even at 1100 K the p-V equation of state of liquid cerium shows a pronounced decrease of the bulk modulus above the gamma-phase region similar to the 775 K isotherm in the solid that also shows an inflection point between gamma-and alpha-type cerium. The inflection point in the 1100 K isotherm indicating the minimum in the bulk modulus separating the gamma- from the alpha-type liquid is located at approximately 3.5 GPa.
  • Sakamaki, T., Kono, Y., Wang, Y., Park, C., Yu, T., Jing, Z., Shen, G.
    Earth and Planetary Science Letters 391 288 - 295 2014年 [査読有り]
     研究論文(学術雑誌) 
    X-ray diffraction and ultrasonic velocity measurements of three silicate glasses (in jadeite, albite, and diopside compositions) show a sharp contrast in pressure-induced changes in structure and elasticity. With increasing pressure to around 6 GPa, polymerized glasses (jadeite and albite) display large shift in the first sharp diffraction peak (FSDP) in the structure factor, S(Q), to higher-Q values, indicating rapid shrinkage in the intermediate-range ordered (IRO) structure. Above 6 GPa, the shift of FSDP decelerates, suggesting that shrinkage in the IRO structure has been largely completed and the structure evolution is now dominated by the diminution of the interstitial volume in a more densely packed arrangement. Associated with this structural change, sound velocities increase with pressure above 6 GPa. In contrast, the depolymerized diopside glass exhibits smaller changes in the pressure dependence for both sound velocities and FSDP positions. Compared to the polymerized glasses, the velocities are faster and the positions of FSDP appear at higher-Q under the same experimental conditions. The results suggest that the depolymerized diopside glass has an initially denser IRO structure compared to that of the polymerized glasses, and there are no sufficient interstitial voids to shrink. The different behaviors between polymerized and depolymerized glasses are apparently related to the initial linkage of tetrahedra and the pressure-induced structural reactions. These results suggest that under compression up to 10 GPa, the degree of polymerization is a major factor affecting the IRO network structure and the sound velocity of silicate glasses. (C) 2014 Elsevier B.V. All rights reserved.
  • Liu, L., Kono, Y., Kenney-Benson, C., Yang, W., Bi, Y., Shen, G.
    Physical Review B - Condensed Matter and Materials Physics 89 17 2014年 [査読有り]
     研究論文(学術雑誌) 
    High-energy synchrotron x-ray diffraction was utilized to study the local order of liquid sulfur at high-pressure and high-temperature conditions. A temperature driven structure change in liquid sulfur was observed, signified by an order of magnitude reduction in lengths of sulfur chains. The large change in chain length implies that this is a liquid-liquid phase transition in sulfur. The chain breakage may strongly influence the physical properties, such as the semiconductor-metal transition and a drastic decrease in viscosity across the transition.
  • Wang, Y., Sakamaki, T., Skinner, L.B., Jing, Z., Yu, T., Kono, Y., Park, C., Shen, G., Rivers, M.L., Sutton, S.R.
    Nature Communications 5 2014年 [査読有り]
     研究論文(学術雑誌) 
    A defining characteristic of silicate melts is the degree of polymerization (tetrahedral connectivity), which dictates viscosity and affects compressibility. While viscosity of depolymerized silicate melts increases with pressure consistent with the free-volume theory, isothermal viscosity of polymerized melts decreases with pressure up to similar to 3-5 GPa, above which it turns over to normal (positive) pressure dependence. Here we show that the viscosity turnover in polymerized liquids corresponds to the tetrahedral packing limit, below which the structure is compressed through tightening of the inter-tetrahedral bond angle, resulting in high compressibility, continual breakup of tetrahedral connectivity and viscosity decrease with increasing pressure. Above the turnover pressure, silicon and aluminium coordination increases to allow further packing, with increasing viscosity and density. These structural responses prescribe the distribution of melt viscosity and density with depth and play an important role in magma transport in terrestrial planetary interiors.
  • Sanloup, C., Drewitt, J.W.E., Crépisson, C., Kono, Y., Park, C., McCammon, C., Hennet, L., Brassamin, S., Bytchkov, A.
    Geochimica et Cosmochimica Acta 118 118 - 128 2013年 [査読有り]
     研究論文(学術雑誌)
  • Lipp M.J, Kono Y, Jenei Zs, Cynn H, Aracne-Ruddle C, Park C, Kenney-Benson C, Evans W.J
    Journal of Physics Condensed Matter 25 34 2013年 [査読有り]
     研究論文(学術雑誌)
  • Nishida, K., Kono, Y., Terasaki, H., Takahashi, S., Ishii, M., Shimoyama, Y., Higo, Y., Funakoshi, K.-I., Irifune, T., Ohtani, E.
    Earth and Planetary Science Letters 362 182 - 186 2013年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Kenney-Benson, C., Park, C., Shen, G., Wang, Y.
    Physical Review B - Condensed Matter and Materials Physics 87 2 2013年 [査読有り]
     研究論文(学術雑誌)
  • Nishiyama, N., Seike, S., Hamaguchi, T., Irifune, T., Matsushita, M., Takahashi, M., Ohfuji, H., Kono, Y.
    Scripta Materialia 67 12 955 - 958 2012年 [査読有り]
     研究論文(学術雑誌) 
    Nanocrystalline bulk stishovite, with pure SiO2 composition, was synthesized under high pressure and temperature. We found that this material has an extremely high fracture toughness (similar to 13 MPa m(1/2)), nearly eight times higher than that of stishovite single crystal. The measured Vickers hardness of this material was similar to 29 GPa and stishovite is known to be one of the hardest oxides. This new material has potential to be used for industrial purposes because of its combination of very high hardness and toughness. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
  • Kono, Y., Irifune, T., Ohfuji, H., Higo, Y., Funakoshi, K.-I.
    Geophysical Research Letters 39 24 2012年 [査読有り]
     研究論文(学術雑誌) 
    Compressional (Vp) and shear (Vs) wave velocities of mid-ocean-ridge basalt (MORB) was investigated at in situ high pressure and high temperature conditions of the mantle transition region by using a combination of ultrasonic and in situ x-ray measurements. Both Vp and Vs of MORB are lower than the previously predicted velocities of the major mantle mineral phases. We found that the Vp and Vs of MORB along a typical geotherm are lower by about 2 and 5%, respectively than those of seismological models, and do not match any global and regional seismological models in the deeper parts of the mantle transition region. Thus, the existence of a basaltic layer in this region is unlikely, suggesting that the oceanic crust materials are transported into the lower mantle. Citation: Kono, Y., T. Irifune, H. Ohfuji, Y. Higo, and K. Funakoshi (2012), Sound velocities of MORB and absence of a basaltic layer in the mantle transition region, Geophys. Res. Lett., 39, L24306, doi:10.1029/2012GL054009.
  • Kono, Y., Park, C., Sakamaki, T., Kenny-Benson, C., Shen, G., Wang, Y.
    Review of Scientific Instruments 83 3 2012年 [査読有り]
     研究論文(学術雑誌) 
    An integration of multi-angle energy-dispersive x-ray diffraction and ultrasonic elastic wave velocity measurements in a Paris-Edinburgh cell enabled us to simultaneously investigate the structures and elastic wave velocities of amorphous materials at high pressure and high temperature conditions. We report the first simultaneous structure and elastic wave velocity measurement for SiO2 glass at pressures up to 6.8 GPa at around 500 degrees C. The first sharp diffraction peak (FSDP) in the structure factor S(Q) evidently shifted to higher Q with increasing pressure, reflecting the shrinking of intermediate-range order, while the Si-O bond distance was almost unchanged up to 6.8 GPa. In correlation with the shift of FSDP position, compressional wave velocity (Vp) and Poisson's ratio increased markedly with increasing pressure. In contrast, shear wave velocity (Vs) changed only at pressures below 4 GPa, and then remained unchanged at similar to 4.0-6.8 GPa. These observations indicate a strong correlation between the intermediate range order variations and Vp or Poisson's ratio, but a complicated behavior for Vs. The result demonstrates a new capability of simultaneous measurement of structures and elastic wave velocities at high pressure and high temperature conditions to provide direct link between microscopic structure and macroscopic elastic properties of amorphous materials. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3698000]
  • Gréaux, S., Nishiyama, N., Kono, Y., Gautron, L., Ohfuji, H., Kunimoto, T., Menguy, N., Irifune, T.
    Physics of the Earth and Planetary Interiors 185 3-4 89 - 99 2011年 [査読有り]
     研究論文(学術雑誌) 
    High-pressure and high-temperature phase transformations of Ca3Al2Si3O12 grossular garnet were examined at 19-26 GPa and 700-2000 K using Kawai-type multi-anvil apparatus coupled with in situ X-ray diffraction (XRD). Recovered samples were analyzed by a combination of micro-focused X-ray diffraction (mu-XRD) and transmission electron microscopy (TEM). The results show that grossular garnet gradually transforms to an Al-rich CaSiO3 perovskite at 22-26 GPa and 1000-1400K. The transition boundary can be expressed as P (GPa) = -0.0082 X T (K) + 33.05. When the garnet completely disappears, we observed orthorhombic CaSiO3 perovskite with a grossular composition. At 20-24 GPa and temperatures above 1500 K the CAS phase with the composition CaAl4Si2O11 appears to accommodate excess Al from the perovskite along with two distinct populations of Al-bearing CaSiO3 perovskites, with Al content of 3.7 and 10.0 wt% Al2O3, respectively. The pressure and temperature of these transitions correspond to the lowermost part of the transition zone and therefore it suggests that Ca-rich aluminosilicates could provide alternative candidates to explain multiple seismic reflections near the 660 km depth discontinuity. (C) 2011 Elsevier B.V. All rights reserved.
  • Gréaux, S., Nishiyama, N., Kono, Y., Irifune, T., Gautron, L.
    Physics and Chemistry of Minerals 38 8 581 - 590 2011年 [査読有り]
     研究論文(学術雑誌) 
    The thermoelastic parameters of the CAS phase (CaAl4Si2O11) were examined by in situ high-pressure (up to 23.7 GPa) and high-temperature (up to 2,100 K) synchrotron X-ray diffraction, using a Kawai-type multi-anvil press. P-V data at room temperature fitted to a third-order Birch-Murnaghan equation of state (BM EOS) yielded: V (0,300) = 324.2 +/- A 0.2 (3) and K (0,300) = 164 +/- A 6 GPa for K' (0,300) = 6.2 +/- A 0.8. With K' (0,300) fixed to 4.0, we obtained: V (0,300) = 324.0 +/- A 0.1 (3) and K (0,300) = 180 +/- A 1 GPa. Fitting our P-V-T data with a modified high-temperature BM EOS, we obtained: V (0,300) = 324.2 +/- A 0.1 (3), K (0,300) = 171 +/- A 5 GPa, K' (0,300) = 5.1 +/- A 0.6 (a,K (0,T) /a,T) (P) = -0.023 +/- A 0.006 GPa K-1, and alpha(0,T) = 3.09 +/- A 0.25 x 10(-5) K-1. Using the equation of state parameters of the CAS phase determined in the present study, we calculated a density profile of a hypothetical continental crust that would contain similar to 10 vol% of CaAl4Si2O11. Because of the higher density compared with the coexisting minerals, the CAS phase is expected to be a plunging agent for continental crust subducted in the transition zone. On the other hand, because of the lower density compared with lower mantle minerals, the CAS phase is expected to remain buoyant in the lowermost part of the transition zone.
  • Gréaux, S., Kono, Y., Nishiyama, N., Kunimoto, T., Wada, K., Irifune, T.
    Physics and Chemistry of Minerals 38 2 85 - 94 2011年 [査読有り]
     研究論文(学術雑誌) 
    The thermoelastic parameters of synthetic Ca3Al2Si3O12 grossular garnet were examined in situ at high-pressure and high-temperature by energy dispersive X-ray diffraction, using a Kawai-type multi-anvil press apparatus coupled with synchrotron radiation. Measurements have been conducted at pressures up to 20 GPa and temperatures up to 1,650 K: this P, T range covered the entire high-P, T stability field of grossular garnet. The analysis of room temperature data yielded V-0,V-300 = 1,664 +/- 2 angstrom(3) and K-0 = 166 +/- 3 GPa for K'(0) fixed to 4.0. Fitting of our P-V-T data by means of the high-temperature third order Birch-Murnaghan or the Mie-Gruneisen-Debye thermal equations of state, gives the thermoelastic parameters: (partial derivative K-0,K-T/partial derivative T)(P) = -0.019 +/- 0.001 GPa K-1 and alpha(0,T) = 2.62 +/- 0.23 x 10(-5) K-1, or gamma(0) = 1.21 for fixed values q(0) = 1.0 and theta(0) = 823 (Isaak et al. Phys Chem Min19:106-120, 1992). From the comparison of fits from two different approaches, we propose to constrain the bulk modulus of grossular garnet and its pressure derivative to K-T0 = 166 GPa and K'(T0) = 4.03-4.35. Present results are compared with previously determined thermoelastic properties of grossular-rich garnets.
  • Kono, Y., Yamada, A., Wang, Y., Yu, T., Inoue, T.
    Review of Scientific Instruments 82 2 2011年 [査読有り]
     研究論文(学術雑誌) 
    Combined ultrasonic and microtomographic measurements were conducted for simultaneous determination of elastic property and density of noncrystalline materials at high pressures. A Paris-Edinburgh anvil cell was placed in a rotation apparatus, which enabled us to take a series of x-ray radiography images under pressure over a 180 degrees angle range and construct accurately the three-dimensional sample volume using microtomography. In addition, ultrasonic elastic wave velocity measurements were carried out simultaneously using the pulse reflection method with a 10 degrees Y-cut LiNbO3 transducer attached to the end of the lower anvil. Combined ultrasonic and microtomographic measurements were carried out for SiO2 glass up to 2.6 GPa and room temperature. A decrease in elastic wave velocities of the SiO2 glass was observed with increasing pressure, in agreement with previous studies. The simultaneous measurements on elastic wave velocities and density allowed us to derive bulk (K-s) and shear (G) moduli as a function of pressure. K-s and G of the SiO2 glass also decreased with increasing pressure. The negative pressure dependence of K-s is stronger than that of G, and as a result the value of K-s became similar to G at 2.0-2.6 GPa. There is no reason why we cannot apply this new technique to high temperatures as well. Hence the results demonstrate that the combined ultrasonic and microtomography technique is a powerful tool to derive advanced (accurate) P-V-K-s-G-(T) equations of state for noncrystalline materials. (C) 2011 American Institute of Physics. [doi:10.1063/1.3552185]
  • Kono, Y.
    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu 20 3 262 - 268 2010年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Gréaux, S., Higo, Y., Ohfuji, H., Irifune, T.
    Journal of Earth Science 21 5 782 - 791 2010年 [査読有り]
     研究論文(学術雑誌)
  • Fujimoto, Y., Kono, Y., Hirajima, T., Kanagawa, K., Ishikawa, M., Arima, M., Suetsugu, D., Bina, C., Inoue, T., Wiens, D., Jellinek, M.
    Physics of the Earth and Planetary Interiors 183 1-2 219 - 228 2010年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Irifune, T., Higo, Y., Inoue, T., Barnhoorn, A., Suetsugu, D., Bina, C., Inoue, T., Wiens, D., Jellinek, M.
    Physics of the Earth and Planetary Interiors 183 1-2 196 - 211 2010年 [査読有り]
     研究論文(学術雑誌)
  • Yokoyama, A., Matsui, M., Higo, Y., Kono, Y., Irifune, T., Funakoshi, K.-I.
    Journal of Applied Physics 107 12 2010年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Nakamoto, M., Irifune, T.
    Journal of Physics: Conference Series 215 2010年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Ishikawa, M., Harigane, Y., Michibayashi, K., Arima, M.
    Tectonophysics 467 1-4 44 - 54 2009年 [査読有り]
     研究論文(学術雑誌)
  • Higo, Y., Kono, Y., Inoue, T., Irifune, T., Funakoshi, K.-I.
    Journal of Synchrotron Radiation 16 6 762 - 768 2009年 [査読有り]
     研究論文(学術雑誌)
  • Kono Y, Miyake A, Ishikawa M, Arima M
    American Mineralogist 93 4 558 - 564 2008年 [査読有り]
     研究論文(学術雑誌)
  • Irifune, T., Higo, Y., Inoue, T., Kono, Y., Ohfuji, H., Funakoshi, K.
    Nature 451 7180 814 - 817 2008年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Ohfuji, H., Higo, Y., Yamada, A., Inoue, T., Irifune, T., Funakoshi, K.-I.
    Journal of Mineralogical and Petrological Sciences 103 2 126 - 130 2008年 [査読有り]
     研究論文(学術雑誌)
  • Matsushita, M., Inoue, T., Yoshimi, I., Kawamura, T., Kono, Y., Irifune, T., Kikegawa, T., Ono, F.
    Physical Review B - Condensed Matter and Materials Physics 77 6 2008年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Higo, Y., Ohfuji, H., Inoue, T., Irifune, T.
    Geophysical Research Letters 34 14 2007年 [査読有り]
     研究論文(学術雑誌)
  • Kono Y, Ishikawa M, Arima M
    Physics of the Earth and Planetary Interiors 161 3-4 215 - 223 2007年 [査読有り]
     研究論文(学術雑誌)
  • Kono, Y., Ishikawa, M., Arima, M.
    Geophysical Research Letters 31 22 1 - 4 2004年 [査読有り]
     研究論文(学術雑誌) 
    Compressional wave velocities (Vp) of gabbronorite, pyroxene granulite, wehrlite and websterite were measured up to 1000 degreesC at 1 GPa during heating and cooling. The wehrlite and websterite, which contain secondary hydrous minerals, show irreversible change in temperature derivative of Vp (partial derivativeVp/partial derivativeT). During heating, these rocks show sudden decrease in Vp when dehydration reactions took place. During cooling, the rocks show a linear increase in Vp. In contrast, the gabbronorite and pyroxene granulite, which are nearly dry crystalline assemblage, show reversible and discontinuous change in partial derivativeVp/partial derivativeT at around 400 degreesC. It changes from - 2.4 and - 2.1 x 10(-4) km s(-1) degrees C-1 to - 4.7 and - 4.5 x 10(-4) km s(-1) degrees C-1. This reversible and discontinuous change in partial derivativeVp/partial derivativeT is difficult to explain by the previously proposed mechanisms, such as thermal cracking, dehydration reaction, and/or partial melting. The data suggest that this reversible and discontinuous change would be associated with phase transition in plagioclase.

書籍

  • Magmas Under Pressure: Advances in High-Pressure Experiments on Structure and Properties of Melts
    河野 義生, Chrystèle Sanloup (担当:編者(編著者))
    Elsevier 2018年04月

共同研究・競争的資金等の研究課題

  • 核-マントル境界におけるケイ酸塩マグマの超高圧構造転移の解明
    日本学術振興会:科学研究費助成事業 基盤研究(A)
    研究期間 : 2020年04月 -2024年03月 
    代表者 : 河野 義生
  • 高圧X線トモグラフィーを活用した高圧下のマグマ研究の推進
    日本学術振興会:科学研究費助成事業 国際共同研究加速基金(国際共同研究強化(B))
    研究期間 : 2019年10月 -2023年03月 
    代表者 : 河野 義生, 桑原 秀治, 近藤 望
  • Experimental study of pressure-induced structural changes in silicate glasses to >100 GPa
    National Science Foundation:(USA)
    研究期間 : 2017年07月 -2018年06月 
    代表者 : 河野 義生
  • 日本学術振興会:科学研究費助成事業 基盤研究(A)
    研究期間 : 2008年 -2012年 
    代表者 : 井上 徹, 大藤 弘明, 松影 香子, 河野 義生, 山田 明寛, 安東 淳一, 肥後 祐司
     
    地球内部での水の分配や相転移境界における水の影響を明らかにし、その結果と不連続面における地震学的データを組み合わせて地球内部における含水量の推定を行った。また、スラブを構成する鉱物の脱水分解反応や状態方程式の研究、さらには鉱物組み合わせにおける水の影響の研究を遂行した。加えて、マントル鉱物中の含水量の組成依存性を考慮した研究を遂行した。含水マグマに関しては、そのマグマの含水量を温度圧力の関数として決定することを試みた。
  • 日本学術振興会:科学研究費助成事業 若手研究(B)
    研究期間 : 2009年 -2010年 
    代表者 : 河野 義生
     
    「高圧下における部分溶融したかんらん岩の弾性波速度測定技術の開発」のために,(1)過去の研究(最大1400℃)以上の高温条件下における弾性波速度測定技術の開発,(2)溶融した岩石を封入した状態での弾性波速度測定方法の開発,(3)測定周波数が弾性波信号強度に及ぼす影響の評価,の3点について主に研究を行い,圧力最大5GPa,温度最大1700℃条件下において部分溶融したかんらん岩の弾性波速度測定に成功した.
  • 含水メルトの弾性波速度測定による地震波速度低速度異常の解明
    日本学術振興会:科学研究費助成事業 特別研究員奨励費
    研究期間 : 2008年 -2008年 
    代表者 : 河野 義生
     
    本年度は,(1)含水ケイ酸塩を溶融可能な高温条件下での弾性波速度測定技術の開発.(2)メルトをカプセルに封入した状態での弾性波速度測定技術の開発を行った.(1)においては,高圧実験セル内部に断熱の良いジルコニアを用いて,高温高圧発生実験のテストを行った.さらに,弾性波を伝搬させるためのロッドを,これまでの研究で用いていたアルミナから断熱の良いジルコニアに変更して弾性波測定実験を行った.その結果,最高1700℃条件下において弾性波測定を行うことに成功した,この温度は,上部マントル圧力条件下において含水ケイ酸塩を溶融させることが可能な温度であり,この測定技術を用いることにより,含水ケイ酸塩を溶融させた状態での弾性波速度測定を行うことが可能になると考えられる.そこで,この技術を用いて,さらに(2)のメルトをカプセルに封入した状態での弾性波速度測定技術の開発を行った.その結果,圧力約5GPa,温度最大1600℃条件下において,MORB組成メルトをBNカプセルに封入した状態での弾性波測定を行うことに成功した.MORB組成が溶融を開始する約1400℃以上の高温条件下において,試料の溶融とともにS波信号は消滅した.一方,P波信号は強度が弱くなるが,最大1600℃まで信号は観察され,その伝搬時間が非常に遅くなる現象が観察された.このような高圧条件下における溶融した岩石の弾性波測定は世界でも初めての実験であり,観測されている地球内部の地震波速度低速度異常を理解するために必要なマグマやそれを含む部分溶融した岩石の弾性波速度の解明に大きく貢献すると考えられる.
  • 斜長石の弾性波速度温度依存性測定による地震波速度低速度異常の検証
    財団法人日本科学協会:笹川科学研究助成
    研究期間 : 2005年04月 -2006年03月 
    代表者 : 河野 義生

委員歴

  • 2014年 - 現在   Frontiers in Earth Science (Earth and Planetary Materials section)   Review Editor
  • 2014年 - 2018年   Advanced Photon Source (USA),   Proposal Review Panel Member (High Pressure)

愛媛大学教員活動実績

教育活動(B)

担当授業科目(B01)

  • 2019, 前期, 学部, 地球内部構造論
  • 2019, 前期, 学部, 地球科学実験Ⅰ
  • 2019, 前期, 修士, 地球科学プレゼンテーション特別実習Ⅰ
  • 2019, 前期, 修士, 地球科学プレゼンテーション特別実習Ⅲ
  • 2019, 前期, 学部, 地球科学実験I
  • 2019, 前期, 学部, 地球内部構造論


Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.