研究者詳細 - 山﨑　大輔

MISC - 山﨑　大輔

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D111型装置を用いた高温高圧変形実験:固体地球深部の流動変形の理解を目指して

西原遊, 辻野典秀, 久保友明, 山崎大輔, 土居峻太, 今村公裕, 芳野極

Photon Factory News 38 ( 3 ) 2020年

六方最密構造(hcp)鉄の流動特性

西原遊, 土居峻太, 辻野典秀, 山崎大輔

KEK Progress Report (Web) ( 2020-6 ) 2020年

D111型装置を用いた高圧変形実験による六方最密構造鉄のレオロジーの研究

西原遊, 土居峻太, 辻野典秀, 山崎大輔

量子ビームサイエンスフェスタ(Web) 2019 2020年

CaSiO₃-ペロブスカイトの相関係と状態方程式

辻野典秀, 山崎大輔, 肥後祐司, 丹下慶範

高圧討論会講演要旨集 60th 2019年

六方最密構造(hcp)鉄のレオロジー

西原遊, 土居峻太, 辻野典秀, 山崎大輔, 肥後祐司

日本地球惑星科学連合大会予稿集(Web) 2019 2019年

ナノアモルファス水素含有層状窒化炭素を出発原料にした高温高圧合成試料の結晶構造解析とその圧力効果 II

匠正治, 永田潔文, 山崎大輔, 大藤弘明, 小島洋平, 平井正明, 森嘉久, 財部健一

高圧討論会講演要旨集 60th 2019年

D111を用いたブリッジマナイトの変形実験

辻野典秀, 山崎大輔, 西原遊

高圧討論会講演要旨集 59th 2018年

ブリッジマナイトのクリープ強度

辻野典秀, 山崎大輔, 櫻井萌, 肥後祐司, 丹下慶範

高圧討論会講演要旨集 58th 165 2017年10月

ナノアモルファス水素含有層状窒化炭素を出発原料にした高温高圧合成試料の結晶構造解析とその圧力効果

匠正治, 永田潔文, 山崎大輔, 大藤弘明, 小島洋平, 平井正明, 森嘉久, 財部健一

高圧討論会講演要旨集 58th 2017年

ナノアモルファス水素含有層状窒化炭素を出発原料にした高温高圧合成

匠正治, 永田潔文, 山崎大輔, 大藤弘明, 小島洋平, 平井正明, 森嘉久, 財部健一

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 78th 2017年

KEKでの大容量プレスを用いた高圧変形実験

西原遊, 久保友明, 芳野極, 大内智博, 山崎大輔, 鈴木昭夫

高圧討論会講演要旨集 57th 179 2016年10月

Seismic attenuation measurement by cyclic loading under high pressure and temperature 査読

Takashi Yoshino, Daisuke Yamazaki, Yuji Higo, Ken Ichi Funakoshi

Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu 24 ( 2 ) 126 - 135 2014年

An experimental method to study the seismic attenuation factor (Q-1) and anelastic properties of materials at high pressure and high temperature has been established by using the multianvil high-pressure deformation device (D-DIA) and a synchrotron X-ray radiography at SPring8. Time resolved images of the sample and reference material provide their strain as a function of time during cyclic loading. Attenuation is determined as the tangent of the angle of phase lag between the sample and the reference material. A newly installed short period sinusoidal cyclic loading oil pressure system enable us to determine minimal strain of the sample in a wide frequency range from 2 to 0.01 hertz on olivine aggregates at 1 GPa and up to 1673 K. The detectable minimum strain is around 5×10^-5. Several test experiments exhibited resolvable Q^-1 (10^-2) above 1273 K. The results are generally consistent with previously reported data.

DOI： 10.4131/jshpreview.24.126

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23GPaまでの高温高圧その場応力-歪同時測定技術の開発

辻野典秀, 山崎大輔, 芳野極, 米田明, 櫻井萌, 西原遊, 肥後祐司

高圧討論会講演要旨集 55th 2014年

変形実験による(Mg,Fe)SiO₃-ペロブスカイトの結晶選択配向

辻野典秀, 西原遊, 山崎大輔, 瀬戸雄介, 高橋栄一

高圧討論会講演要旨集 54th 2013年

Effect of very high pressure on life of plants and animals

F. Ono, Y. Mori, M. Sougawa, K. Takarabe, Y. Hada, N. Nishihira, H. Motose, M. Saigusa, Y. Matsushima, D. Yamazaki, E. Ito, N. L. Saini

Journal of Physics: Conference Series 377 2012年1月

We studied the tolerance of living organisms, such as a small animal (Milnesium tardigradum), a small crustacean (Artemia), non-vascular plants or moss (Ptichomitrium and Venturiella), and a vascular plant (Trifolium) to the extremely high hydrostatic pressure of 7.5 GPa. It turned out that most of the high pressure exposed seeds of white clover were alive. Those exposed to 7.5 GPa for up to 1 day and seeded on agar germinated roots. Those exposed for up to 1 hour and seeded on soil germinated stems and leaves. Considering the fact that proteins begins to unfold around 0.3 GPa, it seems difficult to understand that all the living samples which have been investigated can survive after exposure to 7.5 GPa.

DOI： 10.1088/1742-6596/377/1/012053

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25aAA-7 超高圧下における動植物の生命探索(25aAA 生物物理,領域12(ソフトマター物理,化学物理,生物物理))

小野文久, 伊藤英司, 寒川匡哉, 森嘉久, 財部健一, 波田善夫, 西平直美, 三枝誠行, 松島康, 山崎大輔

日本物理学会講演概要集 67 ( 0 ) 402 - 402 2012年

Bond strengths of New Carbon-nitride-Related material C2N2(CH2) 査読

M. Sougawa, T. Sumiya, K. Takarabe, Y. Mori, T. Okada, H. Gotou, T. Yagi, D. Yamazaki, N. Tomioka, T. Katsura, H. Kariyazaki, K. Sueoka, S. Kunitsugu

23RD INTERNATIONAL CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY (AIRAPT-23) 377 012028 2012年

記述言語：英語出版者・発行元：IOP PUBLISHING LTD

A new carbon-nitride-related material C2N2(CH2) nanopletelet was synthesized by subjecting a precursor C3N4HxOy+Au in a laser-heating diamond anvil cell (LHDAC) to the pressure of 40 GPa and the temperature of 1200-2000 K. The synthesized C2N2(CH2) was accordingly found to be an orthorhombic unit cell of the space group Cmc2(1) with lattice constants a = 7.625 angstrom, b = 4.490 angstrom, and c = 4.047 angstrom. The bulk modulus B-0 was determined to be B-0 = 258 +/- 3.4 GPa, only the 60 % that of the diamond. C2N2(CH2) consists of the tetrahedrally coordinated C with three C-N single bond and the one C-C single bond, and the bridging carbon with the C-CH2-C bond. The C-N single bond length of the tetrahedron ranges from 1.444 to 1.503 angstrom. This bond length is close to the C-N single bond of 1.447 to 1.458 angstrom in the superhard beta-C3N4. The compressibility of the C-N and C-C single bond of C2N2(CH2) ranges from 0.976 to 0.982 with the pressure of 30 GPa. These values are very close to the compressibility of the C-N and C-C single bond of 0.978 to 0.982 in beta-C3N4, cubic-C3N4, and diamond.

DOI： 10.1088/1742-6596/377/1/012028

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温度1100K、圧力60GPaまでのフェロペリクレイスの準静水圧縮

松井正典, 伊藤英司, 山崎大輔, 芳野極, GUO X., SHAN S., 岡本義広, 肥後祐司, 舟越賢一

日本鉱物科学会年会講演要旨集 2011 225 - 225 2011年9月

Crystal Structure of New Carbon-Nitride-Related Material C2N2(CH2) 査読

Masaya Sougawa, Takahiro Sumiya, Kenichi Takarabe, Yoshihisa Mori, Taku Okada, Hirotada Gotou, Takehiko Yagi, Daisuke Yamazaki, Naotaka Tomioka, Tomoo Katsura, Hiroaki Kariyazaki, Koji Sueoka, Shinsuke Kunitsugu

JAPANESE JOURNAL OF APPLIED PHYSICS 50 ( 9 ) 2011年9月

記述言語：英語出版者・発行元：IOP PUBLISHING LTD

A new carbon-nitride- related C2N2(CH2) nanoplatelet was synthesized by subjecting a precursor C3N4HxOy nanoparticle in a laser-heating diamond anvil cell to the pressure of 40 GPa and temperature of 1200-2000 K. The C and N composition of the quenched sample was determined to be C3N2 by using an energy dispersive X-ray spectroscope attached to a transmission electron microscope. The crystal structure and atomic positions of this C3N2 were obtained through Rietveld analysis of the X-ray diffraction pattern measured using synchrotron radiation. The hydrogen composition was difficult to determine experimentally because of the several-hundred-nanometer dimensions of the sample. First-principles calculation was alternatively used to discover the hydrogen composition. The synthesized C2N2(CH2) was accordingly found to be an orthorhombic unit cell of the space group Cmc2(1) with lattice constants a 7.625 angstrom, b 4.490 angstrom, and c 4.047 angstrom. If the CH2 atomic unit is replaced with the CN2 atomic unit and the bonding rearranged, the C2N2(CH2) becomes the expected superhard C3N4. (C) 2011 The Japan Society of Applied Physics

DOI： 10.1143/JJAP.50.095503

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High pressure generation in a kawai-type apparatus equipped with sintered diamond anvils 査読

Daisuke Yamazaki

Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu 21 ( 4 ) 272 - 277 2011年

記述言語：日本語出版者・発行元：Japan Society of High Pressure Science and Technology

In this decade, attainable pressure range in a Kawai-type high-pressure apparatus equipped with sintered diamond as second stage anvil is significantly increased and we generated pressure to 97.2 GPa measured by in situ X-ray observation at SPring-8. By using this technique, we measured compressibility of (Fe0.08Mg0.92)SiO3 perovskite up to more than 90 GPa. The bulk modulus and its pressure derivative are determined to be 268 GPa and 3.8, respectively. These values are slightly different from previous results. However, we obtained consistent results with previous study of bulk modulus of 257 GPa and pressure derivative of 4.3 when we fitted the data in the pressure range less than 70 GPa. The change of compressibility may indicate the spin transition in Fe-bearing perovskite around 70 GPa as suggested by previous study, for example, electrical conductivity measurement, X-ray emission method and so on.

DOI： 10.4131/jshpreview.21.272

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