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High-pressure and high-temperature neutron-diffraction experiments using Kawai-type multi-anvil assemblies High Press. Res. (IF 1.315) Pub Date : 2021-01-11 Asami Sano-Furukawa; Sho Kakizawa; Chikara Shito; Takanori Hattori; Shinichi Machida; Jun Abe; Ken-ichi Funakoshi; Hiroyuki Kagi
ABSTRACT We applied Kawai-type multi-anvil assemblies (MA6-8) for time-of-flight neutron-diffraction experiments to achieve high-pressures and high-temperatures simultaneously. To achieve sufficient signal intensities, the angular access to the sample was enlarged using slits and tapers on the first-stage anvils. Using SiC-binder sintered diamond for the second-stage anvils that transmits neutrons
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The solubility behavior of NaCl in water at high pressure studied by neutron diffraction and Raman scattering High Press. Res. (IF 1.315) Pub Date : 2021-01-04 Qiwei Hu; Ji Chen; Leiming Fang; Xiping Chen; Lei Xie; Li Lei; Chaowen Xu; Guangai Sun; Bo Chen; Duanwei He
ABSTRACT The solubility of NaCl in water is one of the most important thermo-physical properties. However, the solubility behavior of NaCl in water is poorly understood at high pressure and low temperature. Herein, we performed high pressure neutron diffraction and Raman scattering to investigate the solubility of NaCl in water and the corresponding structural change, respectively. With the pressure
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In situ electrical resistivity and viscosity measurements of iron alloys under pressure using synchrotron X-ray radiography High Press. Res. (IF 1.315) Pub Date : 2020-12-28 A. Pommier; K. Leinenweber; H. Pirotte; T. Yu; Y. Wang
ABSTRACT We have developed a new type of experimental setup utilizing a multi-anvil large volume press and designed for simultaneous measurements of structure-sensitive thermophysical properties (diffraction, electrical resistivity, viscosity). This multi-probe capability was tested on iron alloys at 2 GPa and up to 1750 K. Phase transitions as detected by X-ray diffraction patterns are clearly associated
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Experimental and theoretical P-V-T equation of state for Os2B3 High Press. Res. (IF 1.315) Pub Date : 2020-12-26 Kaleb C. Burrage; Chia-Min Lin; Wei-Chih Chen; Cheng-Chien Chen; Yogesh K. Vohra
ABSTRACT Thermoelastic behavior of transition metal boride Os2B3 was studied under quasi-hydrostatic and isothermal conditions in a Paris-Edinburgh cell to 5.4 GPa and 1273 K. In-situ Energy Dispersive X-ray diffraction was used to determine interplanar spacings of the hexagonal crystal structure and the P-V-T data were fitted to a 3rd Order Birch–Murnaghan equation of state with a temperature modification
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Pressure calibration based on the ultrasonic measurement in multi-anvil apparatus High Press. Res. (IF 1.315) Pub Date : 2020-12-26 Wei Song; Qizhe Tang; Chang Su; Xiang Chen; Yonggang Liu
ABSTRACT Two ultrasonic measurement methods for pressure calibration to 4.4 GPa in a multi-anvil apparatus by measuring the travel times of longitudinal wave as a function of pressure are reported. The first method is to continuously calibrate pressure by combining the measured travel times of Z-cut quartz under hydrostatic pressure with the related equation of state and unit-cell parameters of quartz
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Preparation of SEM hydrogel samples using a high pressure water freeze fracture method High Press. Res. (IF 1.315) Pub Date : 2020-12-26 Hirofumi Satani; Masahiko Kuwata; Hirotaka Ishii; Toshifumi Inoue; Akio Shimizu
ABSTRACT The preparation of SEM samples is a complex and time-consuming process. The present report describes the development of a simple and inexpensive high pressure water freeze fracture method for the preparation of SEM samples from hydrogels without using organic solvents. This method involves two key features. First, the sample and water are frozen with liquid nitrogen in a pressure-resistant
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Pressure tolerance of brine shrimp (Artemia) High Press. Res. (IF 1.315) Pub Date : 2020-12-15 Ryo Kitahara; Hiroshi Ueta; Uiko Tomiyasu; Kensuke Egashira
ABSTRACT Life adapts to various environments, including high temperatures and high pressures. The brine shrimp Artemia was used to investigate the tolerance to hydrostatic pressure up to 750 bar. The swimming activity of Artemia nauplii (larval form) decreased as pressure increased, and the activity became null at 400 bar and above. Interestingly, at 300 bar and less, the swimming activity gradually
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In situ formation of FePO4-II: a neutron diffraction study High Press. Res. (IF 1.315) Pub Date : 2020-12-08 C. W. Wilson; C. J. Ridley; S. G. MacLeod; C. L. Bull
ABSTRACT The structural transformation of FePO 4 from the trigonal berlinite phase to the orthorhombic CrVO 4 phase has been studied using neutron diffraction at high pressure and high-temperature. The berlinite structure was compressed to a pressure of 5.2(2) GPa and amorphisation observed. Upon annealing at temperatures above 798(28) K the high pressure FePO 4 structure was observed to form. This
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Clamp cells for high pressure neutron scattering at low temperatures and high magnetic fields at Heinz Maier-Leibnitz Zentrum (MLZ) High Press. Res. (IF 1.315) Pub Date : 2020-11-11 A. Eich; M. Hölzle; Y. Su; V. Hutanu; R. Georgii; L. Beddrich; A. Grzechnik
ABSTRACT We report on the feasibility of high pressure neutron scattering in clamp cells at various diffraction and spectroscopy beamlines in the Heinz Maier-Leibnitz Zentrum in Garching (Germany). The cells are compact in order to fit into the existing sample environment devices and to accommodate samples up to about 150 mm³ at pressures above 1 GPa.
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In situ formation of coestite under hydrothermal conditions High Press. Res. (IF 1.315) Pub Date : 2020-10-15 M. C. Wilding; C. J. Ridley; C. L. Bull; J. B. Parise
ABSTRACT We present the in situ neutron diffraction data of a water and silica mixture at high pressure and temperature. We show initially the formation of ice VI at 1.5 GPa at 290 K in the presence of crystalline SiO2, upon heating we observe its melting at ∼400 K. Upon further warming to 1200 K, we observe melting of the crystalline silica. Upon cooling to 290 K and recovery to ambient pressure,
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Melting and decomposition of orthorhombic B6Si under high pressure High Press. Res. (IF 1.315) Pub Date : 2020-10-15 Vladimir L. Solozhenko; Vladimir A. Mukhanov; Vadim V. Brazhkin
ABSTRACT Melting of orthorhombic boron silicide B6Si has been studied at pressures up to 8 GPa using in situ electrical resistivity measurements and quenching. It has been found that in the 2.6–7.7 GPa range B6Si melts congruently, and the melting curve exhibits negative slope of −31(2) K/GPa that points to a higher density of the melt as compared to the solid phase. At very high temperatures B6Si
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Raman study of 3.65 Å-phase MgSi(OH)6 under high pressure and the bands assignment High Press. Res. (IF 1.315) Pub Date : 2020-10-12 Ulyana Borodina; Sergey Goryainov; Aleksandr Oreshonkov; Anton Shatskiy; Sergey Rashchenko
ABSTRACT 3.65 Å-phase (or hydroxide-perovskite), MgSi(OH)6, is a representative of dense hydrous magnesium silicates (DHMS) with maximum water content (up to ∼35 wt.% H2O) and thus is of interest as one of the largest repositories of water among all the known hydrous phases. Sample of 3.65 Å-phase, grown in DIA-type multianvil apparatus, was studied by Raman spectroscopy under pressure up to ∼7 GPa
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Empirical constrains on volume changes in pressure-induced solid state transformations High Press. Res. (IF 1.315) Pub Date : 2020-09-18 Oliver Tschauner
ABSTRACT By means of comparing molar volumes at reference ambient conditions (298 K, 1.105 Pa) of 160 pressure-driven polymorphic transitions in chalcogenides, germanates, silicates, simple molecular compounds, elemental non-metals and a few metals it is shown that for reconstructive transitions between 0.1 and 150 GPa, mean volume contraction ranges around 11% for about 85% of all examined materials
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Pressure media for high pressure experiments, Daphne Oil 7000 series High Press. Res. (IF 1.315) Pub Date : 2020-09-27 D. Staško; J. Prchal; M. Klicpera; S. Aoki; K. Murata
ABSTRACT Characterization of a new pressure medium Daphne Oil 7575 using a set of three manganin coils, a superconducting temperature of lead and the response of two perpendicular strain-gages down to low temperatures is presented. A complementary study of Daphne Oil 7474 and Daphne Oil 7373 employing identical methods is included as well. Temperature dependence of the solidification point of Daphne
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Challenging a range of high pressure processing parameters to inactivate pathogens in orange juice High Press. Res. (IF 1.315) Pub Date : 2020-10-12 Rodrigo Rodrigues Petrus; John Joseph Churey; Randy William Worobo
ABSTRACT Among the non-thermal food technologies, high pressure processing (HPP) is currently the most widespread intervention in the juice industry. The study herein was conducted to challenge a wide range of pressure (401–599 MPa) and dwell time (87–313 s) in orange juice processing. The parameters were combined and targeted a minimum of 5-log cycle reductions in a cocktail for the pathogens of reference
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Optimization of antioxidant activity and bioactive compounds extraction of winter savory leaves by high hydrostatic pressure High Press. Res. (IF 1.315) Pub Date : 2020-10-22 Sílvia A. Moreira; Manuela E. Pintado; Jorge A. Saraiva
ABSTRACT Winter savory is often used in traditional medicine, having several recognized biological properties. This study aimed to evaluate the effect of high pressure-assisted extraction (HPE) and its optimization by response surface methodology to obtain winter savory extracts with a high content of bioactive compounds and high antioxidant activity (the effect of extraction pressure, extraction time
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Toward an international practical pressure scale: A proposal for an IPPS ruby gauge (IPPS-Ruby2020) High Press. Res. (IF 1.315) Pub Date : 2020-07-23 Guoyin Shen; Yanbin Wang; Agnes Dewaele; Christine Wu; Dayne E. Fratanduono; Jon Eggert; Stefan Klotz; Kamil F. Dziubek; Paul Loubeyre; Oleg V. Fat’yanov; Paul D. Asimow; Tsutomu Mashimo; Renata M. M. Wentzcovitch; other members of the IPPS task group
At the 26th AIRAPT conference in 2017, a task group was formed to work on an International Practical Pressure Scale (IPPS). This report summarizes the activities of the task group toward an IPPS ruby gauge. We have selected three different approaches to establishing the relation between pressure (P) and ruby R1-line shift (Δλ) with three groups of optimal reference materials for applying these approaches
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Practical effects of pressure-transmitting media on neutron diffraction experiments using Paris–Edinburgh presses High Press. Res. (IF 1.315) Pub Date : 2020-06-25 T. Hattori; A. Sano-Furukawa; S. Machida; K. Ohuchi; H. Kira; J. Abe; K. Funakoshi
ABSTRACT To understand the practical effects of pressure-transmitting media (PTM) on neutron diffraction using Paris–Edinburgh presses, diffraction patterns of MgO were collected to approximately 20 GPa using PTMs of Pb, AgCl, 4:1 methanol–ethanol (ME) mixture with and without heating, N2, and Ar. Hydrostaticity in the sample chamber estimated from the MgO 220 peak width improves in the order of Pb
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Boron-doped diamond synthesized by chemical vapor deposition as a heating element in a multi-anvil apparatus High Press. Res. (IF 1.315) Pub Date : 2020-07-07 Longjian Xie; Akira Yoneda; Zhaodong Liu; Keisuke Nishida; Tomoo Katsura
We tested boron-doped diamond (BDD) synthesized by chemical vapor deposition (CVD) as a heating element in a multi-anvil apparatus. We succeeded in manufacturing BDD into a tubular shape by laser cutting and electric discharging machining. The BDD tube shaped by the electric discharging machining was contaminated by discharging electrode materials (Mo and W), which affected the heating performance
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Resistively heated, high pressure, membrane and screw driven diamond anvil cell High Press. Res. (IF 1.315) Pub Date : 2020-07-07 Mario Santoro; Ahmed Hajeb; Federico A. Gorelli
High temperature is of paramount importance in high pressure science. One of the leading tools in this respect is the resistively heated diamond anvil cell (DAC), where the heat is provided by small heaters, positioned close to the diamond/gasket/sample region (internally heated DAC, IHDAC) or by wrapping the DAC body into bigger heaters (externally heated DAC, EHDAC). Although IHDACs can reach sample
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Static compression of rare earth metal holmium to 282 GPa High Press. Res. (IF 1.315) Pub Date : 2020-07-09 Christopher S. Perreault; Yogesh K. Vohra
The phase transitions and equation of state measurements were carried out on rare earth metal Holmium (Ho) to 282 GPa using toroidal diamond anvils thereby doubling the pressure range to which it has been studied previously. The first set of experiment employed standard beveled diamond anvils utilizing copper as an x-ray pressure standard to 217 GPa. The second set of experiment employed toroidal diamond
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X-ray diffraction and Raman spectra of merrillite at high pressures High Press. Res. (IF 1.315) Pub Date : 2020-07-29 Muhua Jia; Xin Hu; Yungui Liu; Sheng Jiang; Xiang Wu; Shuangmeng Zhai
The compressibility and effect of pressure on the vibrations of merrillite, Ca9NaMg(PO4)7, were studied by using diamond anvil cell at room temperature combined with in-situ synchrotron X-ray diffraction and Raman spectroscopy up to about 18 and 15 GPa, respectively. The pressure-volume data was fitted by a third-order Birch–Murnaghan equation of state to determine the isothermal bulk modulus as K0
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Refrigerated shelf-life evaluation of high pressure processed, raw and sous vide cooked lobster High Press. Res. (IF 1.315) Pub Date : 2020-06-16 Sami Humaid; Dhriti Nayyar; Jason Bolton; Brian Perkins; Denise I. Skonberg
High pressure processing (HPP) and sous vide may increase the shelf-life of high value seafood products without the use of additives. This study investigated the effects of 150MPa or 350MPa for 10min on microbial, sensory, and physicochemical qualities of raw and subsequently sous vide cooked (65°C) lobster tails during 28 days of refrigerated storage. Raw lobster pressurized at 350MPa or sous vide
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Elasticity of single-crystal NaCl under high-pressure: simultaneous measurement of x-ray inelastic scattering and diffraction High Press. Res. (IF 1.315) Pub Date : 2020-08-17 Hiroshi Fukui; Akira Yoneda; Seiji Kamada; Hiroshi Uchiyama; Satoshi Tsutsui; Naohisa Hirao; Alfred Q. R. Baron
Elastic stiffness constants, C ijs, of single crystal of NaCl B1 phase have been determined at pressure up to 20 GPa using inelastic x-ray scattering to measure elastic wave velocities and x-ray diffraction to measure densities in the same experimental setup. The Voigt-Reuss-Hill average velocities calculated from the present Cijs are in good agreement with previous ultrasonic measurements of polycrystalline
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Elasticity of single-crystal NaCl under high-pressure: simultaneous measurement of x-ray inelastic scattering and diffraction High Press. Res. (IF 1.315) Pub Date : 2020-08-17 Hiroshi Fukui; Akira Yoneda; Seiji Kamada; Hiroshi Uchiyama; Satoshi Tsutsui; Naohisa Hirao; Alfred Q. R. Baron
ABSTRACT Elastic stiffness constants, C ijs, of single crystal of NaCl B1 phase have been determined at pressure up to 20 GPa using inelastic x-ray scattering to measure elastic wave velocities and x-ray diffraction to measure densities in the same experimental setup. The Voigt-Reuss-Hill average velocities calculated from the present Cijs are in good agreement with previous ultrasonic measurements
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Development of a high pressure stirring cell up to 2 GPa: a new window for chemical reactions and material synthesis High Press. Res. (IF 1.315) Pub Date : 2020-06-05 Ying-Jui Hsu; Alisa Gordeeva; Mathis Antlauf; Ulrich Häussermann; Ove Andersson
ABSTRACT A new method for stirring under high pressure conditions has been developed and tested. The key component is a Teflon cell assembly equipped with magnetic stirring function, which is capable to operate across a wide pressure range, up to at least 2 GPa, in a large volume press. The setup enables adjustable stirrer rotation rate and detection of stirring in a sample, e.g. to observe liquid–solid
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Compression of CsCl and CsBr in the megabar range High Press. Res. (IF 1.315) Pub Date : 2020-06-03 Agnès Dewaele
The quasi-hydrostatic compression of cesium chloride and cesium bromide has been measured with X-ray diffraction up to 141 GPa at 300 K. A cubic to orthorhombic P m 3 ¯ m → P m m a transition, with a ≥10% distortion of lattice parameters, is evidenced in CsBr around 60 GPa. A smaller distortion (∼1.5%) appears in CsCl at the same pressure, followed by a likely transition to a lower symmetry phase which
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On single-crystal neutron-diffraction in DACs: quantitative structure refinement of light elements on SNAP and TOPAZ High Press. Res. (IF 1.315) Pub Date : 2020-05-22 B. Massani; J. S. Loveday; J. J. Molaison; A. M. dos Santos; X. P. Wang; L. L. Daemen; B. Haberl; R. Boehler; M. Guthrie
Quantitative single crystal neutron-diffraction in diamond anvil cells has so far been limited by the neutron flux available at the various neutron sources. As a result, highly precise measurements of the exact position of light elements have not been possible preventing, for example, structural studies of hydrogen and hydrogen bonds under pressure. Here we report experiments carried out on SNAP at
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Compressibility and thermoelasticity of CrN High Press. Res. (IF 1.315) Pub Date : 2020-05-21 Mingqi Yan; Xuefeng Zhou; Hu Cheng; Liping Wang; Jianzhong Zhang; Xiaohui Yu; Duanwei He; Jia-wei Mei; Yusheng Zhao; Shanmin Wang
We report experimental determination of compressibility and thermoelasticity for CrN based on in situ high pressure/high temperature synchrotron x-ray diffraction measurements. The pressure-induced cubic-to-orthorhombic phase transition is observed at ∼ 5 GPa in high-quality CrN samples synthesized using a high pressure reaction route. Equation of state, bulk modulus and axial compressibility of this
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Tantalum doping in HfO2: orthorhombic phase formation at ambient conditions and change in path of pressure-induced structural evolution High Press. Res. (IF 1.315) Pub Date : 2020-05-20 S. Pathak; P. Das; M. Sahu; K. L. Pandey; G. Mandal; G. R. Patkare
A systematic study of orthorhombic phase formation at ambient conditions beyond a critical concentration of dopant Tantalum (Ta) in HfO 2 is reported. The effect on the path of structural evolution due to Ta doping in HfO 2 was also investigated. Studies on Ta-doped HfO 2 samples and their path of structural evolution under compression have significant implications for materials undergoing β-decay
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Measurement of thermal conductivity in laser-heated diamond anvil cell using radial temperature distribution High Press. Res. (IF 1.315) Pub Date : 2020-05-14 Kamil M. Bulatov; Alexander N. Semenov; Alexey A. Bykov; Alexander S. Machikhin; Konstantin D. Litasov; Pavel V. Zinin; Sergey V. Rashchenko
Thermal conductivities of planetary materials under extreme conditions are important input parameters for modeling planetary dynamics such as accretion, geodynamo and magnetic field evolution, plate tectonics, volcanism-related processes etc. However, direct experimental measurements of thermal conductivity at extreme conditions remain challenging and controversial. Here we propose a new technique
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Ab initio investigation of pressure-induced structural transitions and electronic evolution of Th3N4 High Press. Res. (IF 1.315) Pub Date : 2020-05-13 Yue Zhang; Yongliang Guo; Zhiguang Liao; Changdong Liu; Ping Huai; Zhiyuan Zhu; Xuezhi Ke
The crystal structures, lattice dynamics, mechanical, electronic properties, and electron–phonon coupling of Th3N4 under environmental conditions and high pressures have been studied by merging first-principles calculations and particle-swarm optimization algorithm. Four structures are identified for Th3N4, including the R3¯m, I4¯3d, R3¯, and C2/m phases, in which the I4¯3d, R3¯, and C2/m phases are
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Pressure stability of the first hydration shell of yttrium in aqueous YCl3 solution High Press. Res. (IF 1.315) Pub Date : 2020-02-11 M. Elbers; C. Sternemann; K. Julius; M. Paulus; G. Surmeier; N. König; J. Nase; J. Bolle; R. Wagner; T. Irifune; M. Tolan
The pressure stability of the first hydration shell of Y 3+ ions in aqueous solution has been investigated by means of extended x-ray absorption fine-structure spectroscopy at the yttrium K-edge for hydrostatic pressures up to 4.5 kbar and concentrations between 1 M and 2.5 M. We find approximately 8.4 water molecules surrounding the yttrium cation at a mean distance of 2.370 Å at ambient conditions
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Developments of nano-polycrystalline diamond anvil cells for neutron diffraction experiments High Press. Res. (IF 1.315) Pub Date : 2020-02-17 Kazuki Komatsu; Stefan Klotz; Satoshi Nakano; Shinichi Machida; Takanori Hattori; Asami Sano-Furukawa; Keishiro Yamashita; Tetsuo Irifune
A new high pressure cell for neutron diffraction experiments using nano-polycrystalline anvils is presented. The cell design, off-line pressure generation tests and a gas-loading procedure for this cell are described. The performance is illustrated by powder neutron diffraction patterns of ice VII to ∼82 GPa. We also demonstrate the feasibility of single crystal neutron diffraction experiments of Fe3O4
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Opposed type double stage cell for Mbar pressure experiment with large sample volume High Press. Res. (IF 1.315) Pub Date : 2020-01-08 Yoshio Kono; Curtis Kenney-Benson; Guoyin Shen
A new opposed type double-stage large volume cell has been developed to compress large volume samples to more than 100 GPa (Mbar) pressure. A pair of second-stage diamond anvils is introduced into the first-stage Paris–Edinburgh press. The double-stage large volume cell allows the generation of ultrahigh pressures using a large culet diameter of the second-stage diamond anvils (diameters of 0.5–1.2 mm)
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Nano-polycrystalline diamond synthesized through the decomposition of stearic acid High Press. Res. (IF 1.315) Pub Date : 2020-01-20 Hideaki Kawamura; Hiroaki Ohfuji
Here we report a novel route for synthesizing nano-polycrystalline diamond (NPD) using stearic acid (C18H36O2) as a starting material under high pressure and high temperature. The obtained NPD shows a transparent dark-yellowish color similar to the standard NPD synthesized from graphite and consists of extremely fine diamond grains (∼10 nm). The temperature required for the present synthesis of pure
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Review: high pressure generation techniques beyond the limit of conventional diamond anvils High Press. Res. (IF 1.315) Pub Date : 2019-12-26 Takehiko Yagi; Takeshi Sakai; Hirokazu Kadobayashi; Tetsuo Irifune
Current anvil designs and problems associated with various efforts to generate static high pressures beyond the limit of conventional diamond anvil cells (DACs) (∼400 GPa) are reviewed. Pressures of up to 1 TPa have been reported by one research group using the double-stage DAC (ds-DAC) technique, but no other research group has successfully reproduced this high pressure result. Some research groups
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Deep-ultraviolet near band-edge emissions from nano-polycrystalline diamond High Press. Res. (IF 1.315) Pub Date : 2019-12-18 Ryota Ishii; Rei Fukuta; Fumitaro Ishikawa; Masafumi Matsushita; Hiroaki Ohfuji; Toru Shinmei; Tetsuo Irifune; Mitsuru Funato; Yoichi Kawakami
Deep-ultraviolet continuous-wave photoluminescence spectroscopy is performed for nano-polycrystalline diamond (NPD) synthesized by a high pressure high-temperature technique. NPD exhibits clear deep-ultraviolet emissions, which originate from intrinsic excitonic transitions assisted by a momentum-conserving phonon with a photon. Surprisingly, the peak emission energy is about 30 meV higher than that
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Element-selective elastic properties of Fe65Ni35 Invar alloy and Fe72Pt28 alloy studied by extended X-ray absorption fine structure High Press. Res. (IF 1.315) Pub Date : 2019-12-12 M. Kousa; S. Iwasaki; N. Ishimatsu; N. Kawamura; R. Nomura; S. Kakizawa; M. Mizumaki; H. Sumiya; T. Irifune
We present the element-selective local structure analysis of ferromagnetic Fe 65Ni 35 Invar alloy and Fe 72Pt 28 alloy under high pressures as a recent application of nano-polycrystalline diamond (NPD) to extended X-ray absorption fine structure (EXAFS). The Invar effect is a phenomenon where thermal expansion becomes nearly zero in a wide range of temperatures. Fe 72Pt 28 is an alloy exhibiting negative
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An application of NPD to double-stage diamond anvil cells: XAS spectra of rhenium metal under high pressures above 300 GPa High Press. Res. (IF 1.315) Pub Date : 2019-12-17 K. Kuramochi; N. Ishimatsu; T. Sakai; N. Kawamura; T. Irifune
We present the first application of double-stage diamond anvil cells (ds-DACs) to X-ray absorption spectroscopy (XAS) of Rhenium (Re) metal. By using highly stable and sub-micron sized X-ray beam, XAS spectra were successfully observed at the L2,3-edges from the sample encapsulated in the small space between the second-stage anvils. The pressure generation exceeding 300 GPa was evaluated by the pressure-induced
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Exploiting optical properties of nanopolycrystalline diamond in high pressure experiments High Press. Res. (IF 1.315) Pub Date : 2019-12-17 J. Antonio Barreda-Argüeso; Jesús González; Rafael Valiente; Tetsuo Irifune; Fernando Rodríguez
We investigated the optical properties (absorption, luminescence and Raman spectra) of nanopolycrystalline diamond (NPD) aiming at exploring its capabilities as a pressure sensor and as a pressure-cell anvil for combined X-ray/neutron and optical studies. Notably, we analysed the Raman peak shift and broadening with pressure using a Moissanite Anvil Cell (MAC). The results are compared with those obtained
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Synthesis of nano-polycrystalline diamond from glassy carbon at pressures up to 25 GPa High Press. Res. (IF 1.315) Pub Date : 2019-12-23 Tetsuo Irifune; Chiaki Ueda; Shohei Ohshita; Hiroaki Ohfuji; Takehiro Kunimoto; Toru Shinmei
Nano-polycrystalline diamond (NPD) with various grain sizes has been synthesized from glassy carbon at pressures 15–25 GPa and temperatures 1700–2300°C using multianvil apparatus. The minimum temperature for the synthesis of pure NPD, below which a small amount of compressed graphite was formed, significantly increased with pressure from ∼1700°C at 15 GPa to ∼1900°C at 25 GPa. The NPD having grain
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A nano-polycrystalline diamond anvil cell with bulk metallic glass cylinder for single-crystal neutron diffraction High Press. Res. (IF 1.315) Pub Date : 2019-12-13 Keishiro Yamashita; Kazuki Komatsu; Stefan Klotz; Maria T. Fernández-Díaz; Oscar Fabelo; Tetsuo Irifune; Kazumasa Sugiyama; Tooru Kawamata; Hiroyuki Kagi
A high-pressure cell for in-situ single-crystal neutron diffraction was developed. The cell uses nano-polycrystalline diamond anvils in a tubular load frame made of bulk metallic glass which is highly transparent to neutrons and does not produce Bragg reflections. Diffraction peaks from a sample can be measured from almost any direction and the simple geometry of the cell allows accurate attenuation
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Recent progress in high pressure X-ray absorption spectroscopy studies at the ODE beamline High Press. Res. (IF 1.315) Pub Date : 2020-01-13 Lucie Nataf; François Baudelet; Alain Polian; Inga Jonane; Andris Anspoks; Alexei Kuzmin; Tetsuo Irifune
High pressure energy-dispersive X-ray absorption spectroscopy is a valuable structural technique, especially, when combined with a nano-polycrystalline diamond anvil cell. Here we present recent results obtained using the dispersive setup of the ODE beamline at SOLEIL synchrotron. The effect of pressure and temperature on the X-ray induced photoreduction is discussed on the example of nanocrystalline
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Nano-polycrystalline diamond anvils: key devices for XAS at extreme conditions: their use, scientific impact, present status and future needs High Press. Res. (IF 1.315) Pub Date : 2019-12-10 A. D. Rosa; O. Mathon; R. Torchio; J. Jacobs; S. Pasternak; T. Irifune; S. Pascarelli
Nano-polycrystalline diamonds (NPDs) have become fundamental tools for cutting-edge X-ray absorption spectroscopy (XAS) studies at high P/T conditions that opened up new research directions by overcoming previous limitations. Indeed, NPDs yield a continuous and weak X-ray background signal which enables the collection of high-quality XAS data of materials compressed in diamond anvil cells. This is
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High pressure atomic structure of Zr–Cu metallic glass via EXAFS spectroscopy and molecular dynamics simulations High Press. Res. (IF 1.315) Pub Date : 2019-11-27 P. Dziegielewski; O. Mathon; I. Kantor; S. Pascarelli; T. Shinmei; T. Irifune; J. Antonowicz
In this work, we use extended X-ray absorption fine structure (EXAFS) data collected using nano-polycrystalline diamond anvil cell to study the atomic arrangement in Zr–Cu metallic glass in high pressure (HP) conditions. To reveal the microscopic details of stress accommodation mechanism, we performed molecular dynamics (MD) simulations of the HP atomic arrangement. By comparing the experimental and
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Strength and plastic deformation of polycrystalline diamond composites High Press. Res. (IF 1.315) Pub Date : 2019-11-27 Yanbin Wang; Feng Shi; Hiroaki Ohfuji; Julien Gasc; Norimasa Nishiyama; Tony Yu; Timothy Officer; Toru Shinmei; Tetsuo Irifune
The use of nanopolycrystalline diamond has allowed a systematic study on deformation of polycrystalline diamond composites (PCDCs). Bulk PCDCs samples containing either Co or SiC as a binding agent were deformed under high pressure and temperature to strains up to 18% at strain rates ∼10−5 s−1. All samples exhibit strong work hardening. The strength of PCDCs depends on the amount and type of binding
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Data-driven exploration for pressure-induced superconductors using diamond anvil cell with boron-doped diamond electrodes and undoped diamond insulating layer High Press. Res. (IF 1.315) Pub Date : 2019-12-03 Ryo Matsumoto; Zhufeng Hou; Shintaro Adachi; Masanori Nagao; Sayaka Yamamoto; Peng Song; Noriyuki Kataoka; Pedro Baptista de Castro; Kensei Terashima; Hiroyuki Takeya; Hiromi Tanaka; Takayoshi Yokoya; Tetsuo Irifune; Kiyoyuki Terakura; Yoshihiko Takano
Data-driven exploration for pressure-induced superconductors was performed based on the high-throughput first-principles screening of electronic band structures. In the screening conditions, we focused on the characteristics including a narrow band gap, flat band feature, and possibility of metallization under high pressure. The 27 promising compounds were screened out from the database of Atomwork
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Conical support for double-stage diamond anvil apparatus High Press. Res. (IF 1.315) Pub Date : 2019-11-19 Takeshi Sakai; Takehiko Yagi; Ryosuke Takeda; Toshiki Hamatani; Yuki Nakamoto; Hirokazu Kadobayashi; Hideto Mimori; Saori I. Kawaguchi; Naohisa Hirao; Keitaro Kuramochi; Naoki Ishimatsu; Takehiro Kunimoto; Hiroaki Ohfuji; Yasuo Ohishi; Tetsuo Irifune; Katsuya Shimizu
Both micro-paired and conical support type double-stage diamond anvil cells (ds-DAC) were tested using a newly synthesized ultra-fine nano-polycrystalline diamond (NPD). Well-focused X-ray sub-micron beam and the conically supported 2nd stage anvils (micro-anvils) with 10 μm culet enable us to obtain good quality X-ray diffraction peaks from the sample at around 400 GPa. The relationship between confining
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High pressure generation in the Kawai-type multianvil apparatus equipped with sintered diamond anvils High Press. Res. (IF 1.315) Pub Date : 2019-11-14 D. Yamazaki; E. Ito
Generation of high pressure is a key to the investigation of the interior of the Earth. The Kawai-type multianvil apparatus (KMA) has been widely used in the fields of Earth science and material science. In conventional KMA, tungsten carbide (WC) has been used as the second stage anvil material. However, attainable pressure is limited to ∼70 GPa even if newly developed WC is used. Recently, on the
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A brief history of nano-polycrystalline diamond High Press. Res. (IF 1.315) Pub Date : 2020-02-25 Tetsuo Irifune
(2020). A brief history of nano-polycrystalline diamond. High Pressure Research: Vol. 40, Nano-Polycrystalline Diamond: Synthesis and applications, pp. 1-2.
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TiB2-reinforced B4C composites produced by reaction sintering at high-pressure and high temperature High Press. Res. (IF 1.315) Pub Date : 2020-04-08 Xiaonan Wang; Qiang Tao; Yang Han; Qiuyang Hu; Jiaen Cheng; Hongsheng Jia; Pinwen Zhu
Obtaining both high hardness and toughness is a challenge in B4C-nano-adhesive composites. Solving the inhomogeneous distribution of nano-adhesives in B4C and forming the chemical bonding at grain boundary is an effective method. Here, we reported that the uniform distribution of titanium diboride (TiB2)-reinforced B4C composites synthesized by high-pressure and high temperature (HPHT). It is found
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TiC-MgO composite: an X-ray transparent and machinable heating element in a multi-anvil high pressure apparatus High Press. Res. (IF 1.315) Pub Date : 2020-04-06 Fang Xu; Longjian Xie; Akira Yoneda; Nicolas Guignot; Andrew King; Guillaume Morard; Daniele Antonangeli
TiC-MgO composite was developed as a heating element for X-ray study in the multi-anvil high pressure apparatus. We synthesized TiC-MgO blocks (50–70 wt.% of TiC) by compression in a cold isostatic press followed by baking in a gas flow furnace. Heaters of tubular shape were manufactured from the synthesized blocks either by lathe or numerically controlled milling machine. The so-produced heating elements
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Empirical determination of the three-dimensional isentropic equation of state of polyethylene High Press. Res. (IF 1.315) Pub Date : 2020-03-23 Susumu Saeki
An isentropic equation of state (Isen-Eos) in a high-density polyethylene (HDPE) consists of four variables of PS, VS, TS and entropy S where the VS, PS and TS are variables satisfying the isentropic condition that S is constant. The typical values of isentropic derivatives at constant S = 21.35 [J/molK] and T = 313.15 [K] are αS = −1.66 × 10−3 [K−1] and γS = 13.8 [10−3 GPa] where αS and γS are isentropic
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Phase relations in the Fe-P system at high pressures and temperatures from ab initio computations High Press. Res. (IF 1.315) Pub Date : 2020-03-16 Nursultan E. Sagatov; Pavel N. Gavryushkin; Maksim V. Banayev; Talgat M. Inerbaev; Konstantin D. Litasov
Based on the first-principles calculations within the density functional theory and crystal structure prediction algorithms iron phosphide phases stable under pressure of the Earth’s core and temperatures up to 4000 K were determined. A new low-temperature modification FeP-P21/c stable above ∼75 GPa was predicted. Fe2P with the allabogdanite structure has been established to be stable in the low-temperature
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Changes of microflora in high pressure treated Indian white prawn (Fenneropenaeus indicus) High Press. Res. (IF 1.315) Pub Date : 2020-01-06 J. Ginson; Satyen Kumar Panda; C. K. Kamalakanth; J. Bindu
This study was to investigate the piezotolerance and diversity indices of microflora of Indian white prawn (Fenneropenaeus indicus) after high pressure (HP)-treatment. Indian white prawns subjected to HP-treatments and its effect was studied up to species level and compared with unpressurized samples. The bacterium was identified by using bacterial identification schemes, biochemical tests and API
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Pressure effect on the electromotive force of the type R thermocouple High Press. Res. (IF 1.315) Pub Date : 2019-12-23 Yu Nishihara; Shunta Doi; Hideitsu Hino; Yuji Higo; Yoshinori Tange
The pressure effect on the electromotive force (EMF) of a Pt13Rh–Pt (type R) thermocouple was examined to determine the temperature measurement accuracy of solid pressure medium apparatuses in high-pressure experiments. Single-wire EMFs were measured up to pressure of 13 GPa and temperature of 1173 K with a Kawai-type multi-anvil apparatus for Pt13Rh and Pt based on the single-wire method. The pressure
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Numerical and theoretical determination of various materials Hugoniot relations based on the equation of state in high-temperature shock loading High Press. Res. (IF 1.315) Pub Date : 2019-12-10 M. Hallajisany, Jamal Zamani, J. Albelda Vitoria
The numerical shock velocity–particle velocity data were obtained by the use of the conservative laws and data were fitted to the linear and quadratic relation with respect to the particle velocity in various temperatures. An equation was derived for the second parameter of the general Hugoniot relation that could be obtained at every initial temperature loading by the use of the existing equation
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Parallel background subtraction in diamond anvil cells for high pressure X-ray data analysis High Press. Res. (IF 1.315) Pub Date : 2019-12-05 Weizhao Cai, Mohammad Tomal Hossain, Jared Coles, Jordan Lybarger, Joseph Blanton, Eran Sterer, Shanti Deemyad
We present a simple and effective approach to improve X-ray data collected under extreme conditions of pressure and temperature. The X-ray data of the sample and the amorphous, liquid, or crystalline pressure transmitting media (PTM) which surround the sample are collected separately at each pressure and temperature, allowing a satisfactory background subtraction. Using this method, we are able to
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High-temperature electrical resistivity measurements of hcp iron to Mbar pressure in an internally resistive heated diamond anvil cell High Press. Res. (IF 1.315) Pub Date : 2019-11-18 Sho Suehiro, Tatsuya Wakamatsu, Kenji Ohta, Kei Hirose, Yasuo Ohishi
Electrical and thermal transport properties of iron are of great importance for understanding the thermal evolution and dynamics of the Earth’s core, of which iron is a major component. However, the reported values of iron’s conductivity at core conditions are still highly controversial. In this study, we employed an internally resistive heated diamond anvil cell (IHDAC) technique that reduces temperature
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