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Open Journal of Orthopedics 2022年第4期12卷 131-141页

作者： Kinya Nishida Yong Ho Che hideto irifune Kazuhiro Uesugi Akane Maeda Koji Miyata Department of Orthopaedic Surgery Teine Keijinkai Hospital Sapporo Japan

Background: AO type C3 distal radius fracture (DRF) is the most difficult-to-treat fracture type because of a tendency to shorten and collapse. The purpose of this study is to investigate the clinical and radiographic outcomes of comminuted intra-articular DRFs treated with a dynamic external fixator combined with a volar locking plate (VLP). Methods: Eleven patients (mean age, 61 years) with comminuted intra-articular DRFs were treated with a dynamic type of external fixator combined with a VLP. Following reduction and fixation with a VLP, the dynamic external fixator was applied and the distal ball joint of the fixator was aligned with the lunate-capitate line. The ball joint was unlocked approximately 2 weeks after surgery to allow wrist mobilization. The fixator was removed 3 - 6 weeks (mean, 5 weeks) after surgery. Consequently, clinical and radiographic assessments were carried out at the final follow-up. Results: At the final follow-up, the mean range values of wrist extension and flexion were 76°and 64°, respectively. Compared with the contralateral side, the mean grip strength was 84%. The mean Modified Mayo Wrist Score and the Disabilities of the Arm, Shoulder and Hand score were 88 and 9, respectively. No significant differences in the radiographic parameters exist between after surgery and final follow-up. Conclusions: This study indicated that the dynamic wrist fixator combined with a VLP is effective for the treatment of AO type C3 DRFs.

关键词： Distal Radius Fracture Intra-Articular Fracture External Fixator Dynamic External Fixator Volar Locking Plate

Technical Development of Simple Shear Deformation Experiments Using a Deformation-DIA Apparatus

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Journal of Earth Science 2010年第5期21卷 523-531页

作者： Tomohiro Ohuchi Takaaki Kawazoe Norimasa Nishiyama Yu Nishihara Tetsuo irifune Geodynamics Research Center Ehime University Senior Research Fellow Center Ehime University

Technical developments for simple shear deformation experiments at high pressures were made. The newly designed cell assembly can be compressed by deformation-DIA apparatuses with the MA 6-6 system, which consists of six second-stage tungsten carbide anvils （with a truncated edge length of 5 mm） and the anvil guide. Deformation of samples was barely observed during the compression process, showing that the shear strain of the deformed samples can be measured by the rotation of a strain marker. Simple shear deformation experiments on anhydrous and hydrous oli- vine aggregates were conducted under upper mantle conditions （pressures of 5.2-7.6 GPa and temperatures of 1 473-1 573 K）, and sample deformation with a shear strain of 7=0.8-1.2 was successfully achieved at a shear strain rate of 4.0×10^-5-7.5×10^-5 s^-1. The present study extended the pressure range of simple shear deformation experiments in the deformation-DIA apparatus from 3 GPa in an early study to 7.6 GPa at high temperatures.

关键词： simple shear deformation deformation-DIA MA 6-6 upper mantle.

Pressure and Temperature Dependences of Elastic Properties of Grossular Garnet up to 17 GPa and 1 650 K

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Journal of Earth Science 2010年第5期21卷 782-791页

作者： Yoshio Kono Steeve Gréaux Yuji Higo Hiroaki Ohfuji Tetsuo irifune Geodynamics Research Center Ehime University JASRI 1-1-1 Mikazuki-cho Sayo-gun Hyogo 679-5198 Japan

Simultaneous ultrasonic elastic wave velocity and in situ synchrotron X-ray measurements on grossular garnet were carried out up to 17 GPa and 1 650 K. P- and S-wave vdoeities and bulk and shear modulus showed linear pressure and temperature dependence. These data yielded a pressure derivative of the bulk modulus of 4.42（7） and a shear modulus of 1.27（3）, which are in good agreement with those of garnets with variable chemical compositions. Temperature dependence of the bulk modulus of grossular （-1.36×10^-2 GPafK） is also similar to that of other garnets, while the temperature dependence of the shear modulus of grossular （-1.11×10^-2 GPa/K） is higher than those of magnesium end-member garnets and pyrolitic garnet.

关键词： elastic property grossular garnet high pressure high temperature.

Preliminary Deformation Experiment of Ringwoodite at 20 GPa and 1 700 K Using a D-DIA Apparatus

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Journal of Earth Science 2010年第5期21卷 517-522页

作者： Takaaki Kawazoe Tomohiro Ohuchi Norimasa Nishiyama Yu Nishihara Tetsuo irifune Geodynamics Research Center Ehime University Senior Research Fellow Center Ehime University

A deformation experiment of ringwoodite with a strain of 9% was achieved at 20 GPa and 1 700 K and at a strain rate of 3×10^-5 s^-1 using a deformation-DIA （D-DIA） apparatus and a multi-anvil 6-6 （MA 6-6） assembly. The crystallographic orientations of the deformed sample were successfully analyzed by the electron backscatter diffraction （EBSD） method, although any notable latticepreferred orientation （LPO） was not observed presumably due to the insufficient strain in the present experiment. In this study, the deformation experiment on ringwoodite succeeded at P-T conditions consistent with the lower part of the mantle transition zone and at a controlled strain rate for the first time. The present study extended the pressure range of deformation experiments in the D-DIA apparatus from 16 GPa in our earlier study to 20 GPa at 1 700 K. The successful extension of the pressure range demonstrates potential importance of the D-DIA apparatus in studying rheological properties of minerals under the P-T conditions of the whole mantle transition zone.

关键词： ringwoodite mantle transition zone rheology viscosity mantle dynamics.

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Foreword

Journal of Earth Science 2010年第5期21卷 489-494,I0001页

作者： Harry W Green II 章军锋 Larissa F Dobrzhinetskaya Tetsuo irifune Department of Earth Sciences University of California at Riverside Riverside 92521 USA State Key Laboratory of Geological Processes and Mineral Resources Faculty of Earth Sciences China University of Geosciences Geodynamics Research Center Ehime University Matsuyama 790-8577 Japan

The contributions to this Special Issue were called on the occasion of the upcoming birthday anni- versary of one of the outstanding scientists in field of mantle rheology and rock deformation, Prof. Zhenmin Jin, China University of Geosciences, to celebrate his scientific life achievements. The issue consists of a series of articles that highlight the versatilitv of Prof.

关键词： Olivine Lithospheric Mantle North China Craton Enstatite Mantle Xenolith

High-pressure phase transitions of anorthosite crust in the Earth's deep mantle

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Geoscience Frontiers 2018年第6期9卷 1859-1870页

作者： Masayuki Nishi Steeve Gréaux Shigehiko Tateno Yasuhiro Kuwayama Kenji Kawai Tetsuo irifune Shigenori Maruyama Geodynamics Research Centre Ehime UniversityEhime 790-8577Japan Earth-Life Science Institute Tokyo Institute of TechnologyTokyo 152-8550Japan Institute for Planetary Materials Okayama UniversityMisasaTottori 682-0193Japan Department of Earth Planetary Science School of ScienceUniversity of Tokyo113-0033 Hongo 7-3-1BunkyoTokyoJapan Novosibirsk State University Pirogova 1630090Russia

We investigated phase relations, mineral chemistry, and density of lunar highland anorthosite at conditions up to 125 GPa and 2000 K. We used a multi-anvil apparatus and a laser-heated diamond-anvil cell for this purpose. In-situ X-ray diffraction measurements at high pressures and composition analysis of recovered samples using an analytical transmission electron microscope showed that anorthosite consists of garnet,CaAl_4Si_2O_(11)-rich phase(CAS phase), and SiO_2 phases in the upper mantle and the mantle transition zone.Under lower mantle conditions, these minerals transform to the assemblage of bridgmanite, Ca-perovskite,corundum, stishovite, and calcium ferrite-type aluminous phase through the decomposition of garnet and CAS phase at around 700 km depth. Anorthosite has a higher density than PREM and pyrolite in the upper mantle, while its density becomes comparable or lower under lower mantle conditions. Our results suggest that ancient anorthosite crust subducted down to the deep mantle was likely to have accumulated at660-720 km in depth without coming back to the Earth's surface. Some portions of the anorthosite crust might have circulated continuously in the Earth's deep interior by mantle convection and potentially subducted to the bottom of the lower mantle when carried within layers of dense basaltic rocks.

关键词： Anorthosite Phase transformation Multi-anvil apparatus Diamond-anvil cell Mantle dynamics

Formation of diamond powders from melamine under high pressure and high temperature

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Chinese Physics C 2013年第8期37卷 80-83页

作者：房雷鸣陈喜平 H. Ohfuji T. irifune 孙光爱陈波彭述明 Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics Geodynamics Research Center Ehime University

High pressure pyrolysis of melamine has been attracting great interest recently, due to it being considered as a suitable precursor to realize the g-C3N4 and even superhard C3N4. In this work, we studied the detailed pyrolysis behavior of melamine at 22 GPa. Melamine was stable at 800℃, and decomposed to diamond in the form of powder at 1500-2000 ℃ under this pressure condition. At 2000℃, the pure cubic diamond powders with 0.1 0.5 μm grain size were obtained. The diamond particles exhibited euhedral forms and dispersed to each other, we proposed that these novel features were caused by the presence of liquid N2 and NH3 during diamond formation. The high pressure pyrolysis of melamine may provide a new means of producing micrometer-sized diamond powders.

关键词： melamine decomposition high pressure diamond powder

Pressure-induced disordering of site occupation in iron–nickel nitrides

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Matter and Radiation at Extremes 2021年第3期6卷 55-63页

作者： Binbin Wu Li Lei Feng Zhang Qiqi Tang Shan Liu Meifang Pu Duanwei He Yuanhua Xia Leiming Fang Hiroaki Ohfuji Tetsuo irifune Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065China Institute of Nuclear Physics and Chemistry Academy of Engineering PhysicsMianyang 621900China Geodynamics Research Center Ehime UniversityMatsuyama 790-8577Japan

Controlled disordering of substitutional and interstitial site occupation at high pressure can lead to important changes in the structural and physical properties of iron–nickel nitrides.Despite important progress that has been achieved,structural characterization of ternary Fe–Ni–N compounds remains an open problem owing to the considerable technical challenges faced by current synthetic and structural approaches for fabrication of bulk ternary nitrides.Here,iron–nickel nitride samples are synthesized as spherical-like bulk materials through a novel highpressure solid-state metathesis reaction.By employing a wide array of techniques,namely,neutron powder diffraction,Rietveld refinement methods combined with synchrotron radiation angle-dispersive x-ray diffraction,scanning electron microscopy/energy dispersive x-ray spectroscopy,and transmission electron microscopy,we demonstrate that high-temperature and high-pressure confinement conditions favor substitutional and interstitial site disordering in ternary iron–nickel nitrides.In addition,the effects of interstitial nitrogen atoms and disorderly substituted nickel atoms on the elastic properties of the materials are discussed.

关键词： disordering nickel ternary

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高压下地幔物质的相转变

世界地质 1991年第1期10卷 15-16页

作者： irifune T. 赵国春

具有多种压砧装置的高压技术的新进展,使我们能够测定25～27Pa条件下的地幔物质相转变。这样,我们就可以对地幔岩、玄武岩和橄榄岩以及那些与此成分类似的岩石相平衡进行广泛研究(例如,I(?)ifune和Ringwood,1987,a、b)。作者在这里对这... 详细信息

具有多种压砧装置的高压技术的新进展,使我们能够测定25～27Pa条件下的地幔物质相转变。这样,我们就可以对地幔岩、玄武岩和橄榄岩以及那些与此成分类似的岩石相平衡进行广泛研究(例如,I(?)ifune和Ringwood,1987,a、b)。作者在这里对这些研究及一些新的实验结果作了一些总结,并讨论这些结果对地幔组成和构造的意义。 CaSiO_2-MgSiO_6系统:在使用金刚石压砧所得到的实验结果中,有关透辉石的相转变一直存在着不同意见(如Liu,1987;Tami和Yagi,在出版中)。基于电子探针和扫描电镜对淬火样品中透辉石相转变性质的仔细鉴定,作者的最新研究(I(?)ifune等,在出版中)揭示出,在19GPa以上。

关键词：地幔物质相转变岩石相平衡

650km深处地震不连续面的新模式——地幔动力学及分异作用的意义

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宝石和宝石学杂志(中英文) 1988年第3期 25-33页

作者： A.E.Ringtood T.irifune 朱德玉

年青较薄的大洋板块在俯冲期间,由于化学浮力关系而被圈闭于600-700km之间的重力稳定层内,从而部分地脱离了下地幔的对流系统.但当壮年期较厚板块俯冲时,其上部较冷的分异层将会突破这个隔层,而被拖曳到下地幔的对流圈内.由此得出的混... 详细信息

年青较薄的大洋板块在俯冲期间,由于化学浮力关系而被圈闭于600-700km之间的重力稳定层内,从而部分地脱离了下地幔的对流系统.但当壮年期较厚板块俯冲时,其上部较冷的分异层将会突破这个隔层,而被拖曳到下地幔的对流圈内.由此得出的混合对流模式就会对650km深处地震不连续面的性质以及地幔的地球化学演化提供一种大有希望的解释.

关键词：方辉橄榄岩重力分异作用圈闭纯橄榄岩中心力地质构造纯橄岩玄武岩壳大洋岩石圈板块俯冲大洋型地壳洋壳部分熔融地震不连续面石榴石岩俯冲作用