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Structure and properties of a quasi-one-dimensional compound BaTiS3 under pressure High Press. Res. (IF 2.0) Pub Date : 2024-03-11 L. C. Fu, W. J. Cheng, Y. Liu, L. C. Shi, Y. Peng, J. Zhang, Z. W. Li, X. D. Li, J. L. Zhu, X. C. Wang, C. Q. Jin
We report the studies of structure and properties of a quasi-one-dimensional (quasi-1D) compound BaTiS3 under pressure. The poly-crystalline samples are synthesized by solid-state reaction method a...
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The influence of the HIP process on the microstructure, critical temperature and critical current density of double-doped (with Dy2O3 + C, and Tb2O3 + C) MgB2 bulk compounds High Press. Res. (IF 2.0) Pub Date : 2024-02-06 Grzegorz Gajda, Krzysztof Filar, Andrzej Morawski, Daniel Gajda
We present the results of the irreversibility field (Birr), critical temperature (Tc), and magnetic critical current density (Jcm) for cylindrical samples encapsulated in carbon and doped with 1-3 ...
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Scintillator efficiency enhancement potential consequent to the pressure-dependent electronic, optical and elastic properties of CaI2: first-principles calculations High Press. Res. (IF 2.0) Pub Date : 2024-02-02 Pradeep Kumar, Agnikumar G. Vedeshwar
First-principles calculations are carried out to investigate the effect of pressure (up to 40 GPa) on electronic, optical and elastic properties of the scintillator material calcium iodide, CaI2, b...
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Simultaneous compression of NaCl, Au, and ruby: toward mutually consistent pressure scales High Press. Res. (IF 2.0) Pub Date : 2024-01-09 Yanbin Wang, Guoyin Shen, Jesse S. Smith
We evaluate pressure consistency of equations of state (EOS) for NaCl and Au at 300 K. The simultaneous measurements of unit-cell volumes (V) with ruby R1 line shifts (Δλ) in a helium (He) loaded d...
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Carbon isotopic composition of solid carbon and C–H–O fluid produced through the decomposition of stearic acid under HP-HT condition High Press. Res. (IF 2.0) Pub Date : 2023-12-27 Hideaki Kawamura, Hiroaki Ohfuji, Madhusoodhan Satish-Kumar, Sasidharan Kiran, Akio Suzuki
We estimated δ13C of the C–H–O fluid produced by the decomposition of stearic acid at high-pressure and high-temperature conditions (10 and 17 GPa, 800–1600°C) from δ13C of the solid carbon product...
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Raman spectroscopic characterization of the CO2-N2 gaseous system at 24–300°C and 2–40 MPa and applications High Press. Res. (IF 2.0) Pub Date : 2023-12-26 Haiyan Zhang, I-Ming Chou
CO2 and N2 are important gas components of deep-sourced geological fluids. To establish a quantitative method for the study of these fluids, we used a high-pressure optical cell, a heating–cooling ...
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High-pressure synthesis of half-doped perovskites MnV0.5Nb0.5O3 and MnV0.5Ta0.5O3 with unusual A-site small Mn2+ cations High Press. Res. (IF 2.0) Pub Date : 2023-11-21 Xun Kang, Hiroaki Hayashi, Alexei A. Belik, Yoshihiro Tsujimoto, Kazunari Yamaura
We have successfully synthesized two new half-doped perovskites, MnV0.5Nb0.5O3 and MnV0.5Ta0.5O3, with unique small Mn2+ cations at the A site under high-temperature and high-pressure conditions (6...
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A novel mechanism for low- and high pressure measurement with variable-thickness diaphragm High Press. Res. (IF 2.0) Pub Date : 2023-10-30 Hamed Yaghooti, Abbas Pak
In pressure sensors, pressure measurement is based on the movements of the elastic elements under different pressures. Since there is no elastic element able to move under low and high pressures, t...
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The study of steel wire winding split type ultrahigh pressure die based on different winding methods High Press. Res. (IF 2.0) Pub Date : 2023-10-30 Zhiwei Liu, Caihua Yang, Song Guo, Feng Ding
We propose a novel structure of ultrahigh pressure die which consists of a split compression cylinder, a support ring, and steel wire winding, and the impacts of various steel wire winding methods ...
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FoilTrack: a package to increase strain-resolution by improved X-radiographic image processing High Press. Res. (IF 2.0) Pub Date : 2023-08-23 Simon A. Hunt
In high pressure multi-anvil experiments X-radiography is used to ascertain strain in deforming samples because the tooling prevents optical or other direct observations of the sample. The processi...
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Structure evolution of fluorapophyllite-(K) under high pressure High Press. Res. (IF 2.0) Pub Date : 2023-08-20 Yurii V. Seryotkin, Mark A. Ignatov
The high pressure structural evolution of a natural fluorapophyllite-(K) K0.70(NH4)0.20 Ca3.97Na0.07[Al0.04Si7.96O20]F0.99·(H2O)8.05, Z = 2, a = 8.9757(2), c = 15.7920(2) Å, space group P4/mnc, fro...
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Equation of state of KI up to 150 GPa High Press. Res. (IF 2.0) Pub Date : 2023-07-23 Robin Fréville, Agnès Dewaele, Nicolas Guignot, Gaston Garbarino, Mohamed Mezouar
ABSTRACT The equation of state of potassium iodide, KI, has been determined up to 156 GPa at 298 K by angular-dispersive X-ray diffraction in diamond-anvil-cell. Helium pressure transmitting medium was used to minimize non-hydrostatic stress on the sample. The B2 phase is stable at least between 2 and 156 GPa. Pressure–volume data were fitted using a Rydberg–Vinet equation of state. The volume, isothermal
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Correction High Press. Res. (IF 2.0) Pub Date : 2023-07-12
Published in High Pressure Research: An International Journal (Vol. 43, No. 3, 2023)
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Large volume multianvil cell assembly for hydrothermal synthesis and conversions up to 6.5 GPa and 400°C High Press. Res. (IF 2.0) Pub Date : 2023-07-12 Logan J. Leinbach, Isaac R. Rhoden, Kurt Leinenweber, Ove Andersson, Alisa Gordeeva, Ulrich Häussermann
ABSTRACT A multianvil cell assembly with octahedral edge length 25 mm has been adapted for high pressure investigations involving water-rich environments up to 6.5 GPa and 400°C. Water-rich samples are confined in Teflon containers with a volume up to 300 mm3. Applicability tests were performed between 250 and 400°C by investigating the transformation of amorphous titania particles close to the rutile–TiO2-II
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Use of finite element analysis for the thermal gradient determination of a neutron transparent high-pressure sample environment for neutron tomography High Press. Res. (IF 2.0) Pub Date : 2023-06-24 Vili Grigorova, Svyatoslav Shcheka, Fatemeh Salehi, Konstantin V. Kamenev, Simon M. Clark
ABSTRACT A 3D Finite Element Analysis model was developed to describe the temperature distribution inside a novel neutron transparent high-pressure sample assembly. The validity of the model was established by conducting experimental validation. The Finite Element Analysis model was utilised to evaluate the sample assembly’s temperature gradients and optimise its geometry and components. The results
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High pressure Raman study of Na4Ca(CO3)3 from the ambient pressure to 11 GPa High Press. Res. (IF 2.0) Pub Date : 2023-06-04 Sergey Rashchenko, Maria Kolesnichenko, Anastasia Mikhno, Anton Shatskiy
ABSTRACT Na-Ca double carbonates were found as the inclusions in ‘superdeep’ Juina diamonds and as the products of high pressure experiments and thus are regarded as the potential host of CO2 in the deep mantle. Recently, Na-rich carbonate (21.0% wt. of Na2O vs. 13.6% wt. of CaO) was reported as the product of experiment with carbonated eclogite treated at 21 GPa and 1200°C. Na/Ca ratio of this carbonate
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hpMCA: a Python-based graphical program for energy-dispersive X-ray diffraction data collection and analysis High Press. Res. (IF 2.0) Pub Date : 2023-05-27 Rostislav Hrubiak, Mark L. Rivers
ABSTRACT Energy-dispersive X-ray diffraction (EDXD) at synchrotron beamlines is commonly used for the study of material properties under high pressure and/or high temperature. Experimenters typically rely on the availability of robust data collection and analysis at a beamline, but this has become increasingly difficult, especially with the introduction of multi-element detectors that generate complex
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The use of LEDs as a light source for fluorescence pressure measurements High Press. Res. (IF 2.0) Pub Date : 2023-05-17 Rustem Khasanov, Matthias Elender, Stefan Klotz
ABSTRACT We discuss the use of commercial high power light emitting diodes (LEDs) as a light source for fluorescence pressure measurements. The relatively broad light emitting spectra of single color LEDs (in comparison with lasers) do not prevent producing narrow fluorescence lines at least for two widely used pressure indicator materials, namely ruby ( Cr3+:Al2O3Cr3+:Al2O3 ) and strontium tetraborate
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Salting and slight drying as combination pretreatments to alleviate quality alteration of raw grass carp fillets after high pressure processing High Press. Res. (IF 2.0) Pub Date : 2023-04-24 Linyun Chen, Biansheng Li, Zheng Ruan, Jiang Qian
ABSTRACT High pressure can induce significant sensory quality changes in fish. Considering the important role of raw attributes in ready-to-eat aquatic products, our study thus focused on combination treatments prior to pressurization, to maintain grass carp quality. Fish fillets with or without salting and/or slight drying were pressurized under 0.1, 300, 400, and 500 MPa for 10 min. Microbiological
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Effect of high-hydrostatic-pressure processing on catechin content in green tea leaves High Press. Res. (IF 2.0) Pub Date : 2023-04-02 Hsiuming Liu, Shigeaki Ueno, Tetsuya Araki
ABSTRACT Green tea catechins can improve human health, and their retention during processing is a concern. High hydrostatic pressure (HHP) blanching is a nonthermal processing that can increase both nutrients and flavor in tea. Thermal blanching retains catechins but decreases nutrients and flavor. We investigated catechin retention potency via HHP and thermal treatment. Fresh green tea leaves were
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Refractive index of shock-compressed liquid nitrogen up to 29 GPa High Press. Res. (IF 2.0) Pub Date : 2023-03-31 Muhammad Sabeeh Akram, Zhuo-Ning Fan, Fu-Sheng Liu
ABSTRACT We report the equation of state and optical properties of shock-compressed liquid nitrogen (LN2) by using a two-stage light-gas gun at pressure up to 29 GPa. Laser velocimetry measurements were used to investigate the transparency and refractive index of shocked LN2 as a function of density. As the density increased with increasing pressure and temperature (13–25 GPa), the refractive index
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Vacuum impregnation of liquid into carrot assisted by high hydrostatic pressure High Press. Res. (IF 2.0) Pub Date : 2023-03-31 Ming Gao, Kazuki Nomura, Yasumasa Ando, Yoshiko Nakaura, Zhenya Zhang, Kazutaka Yamamoto
ABSTRACT Carrot was impregnated with pigment solution by vacuum heat sealing (VS) and/or high hydrostatic pressure treatment (HHP; 100–600 MPa, 25°C, 5 min). Impregnation efficacy was evaluated as impregnation ratio (%) by image analysis, while damages of cell membrane and texture were quantified by electrical impedance spectroscopy and texture analysis, respectively. Combinations of VS and HHP exclusively
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Thermal conductivity of platinum and periclase under extreme conditions of pressure and temperature High Press. Res. (IF 2.0) Pub Date : 2023-03-27 Akira Hasegawa, Kenji Ohta, Takashi Yagi, Kei Hirose
ABSTRACT We have measured the thermal diffusivity and conductivity of platinum and MgO periclase at high pressures (P) and high temperatures (T) by combining the pulsed light heating thermoreflectance technique with a laser-heated diamond anvil cell. The obtained thermal conductivity of platinum shows positive pressure and temperature dependences, reaching about 210 W/m/K at the highest P–T condition
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Effect of pressure of vanadium nitride using XRD and DFT High Press. Res. (IF 2.0) Pub Date : 2023-03-21 Lun Xiong, Lujun Huang, Dujin Liu, Yingchun Ding, Junran Zhang
ABSTRACT In this study, synchrotron radiation X-ray diffraction is used to study the equation of state of vanadium nitride in a diamond anvil cell at room temperature. Experimental results reveal the high stability of the cubic structure up to 76 GPa pressure. In addition, the bulk modulus of vanadium nitride derived from XRD data is K0 = 328.4(2.8) GPa with K0′ = 5.86(0.14). Finally, the high pressure
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On the creation of thermal equations of state for use in Dioptas High Press. Res. (IF 2.0) Pub Date : 2023-03-18 James D. McHardy, Christian V. Storm, Matthew J. Duff, Simon G. Macleod, Malcolm I. McMahon
ABSTRACT Dioptas is a widely used software package for integrating and analysing 2-dimensional diffraction images. To help interpret the integrated diffraction profiles it produces, Dioptas users can input files that parameterise a material's thermal equation of state (EoS), enabling the positions of the Bragg peaks from that material to be calculated as a function of pressure and temperature. However
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SonicPy: a suite of programs for ultrasound pulse-echo data acquisition and analysis High Press. Res. (IF 2.0) Pub Date : 2023-03-15 Rostislav Hrubiak, Blake T. Sturtevant
ABSTRACT Sound speed and elastic constants measurements in solids and liquids are commonly performed using the ultrasound pulse-echo technique. Recent advances have expanded the use of this technique at numerous high pressure synchrotron beamlines and offline laboratories. However, the increased experimental throughput has revealed many limitations in existing software for handling the rapid measurement
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Modeling the inactivation of Aspergillus niger spores in a model parenteral emulsion by high hydrostatic pressure and its effect on the emulsion droplet size High Press. Res. (IF 2.0) Pub Date : 2023-03-03 Maricarmen Iñiguez-Moreno, Gabriel Ascanio, Montserrat Calderón-Santoyo, Estefanía Brito-Bazán, Edmundo Brito-de la Fuente, Juan Arturo Ragazzo-Sánchez
ABSTRACT A predictive model based on the Box–Behnken design was developed to determine the effect of high hydrostatic pressure (HHP), temperature, and cycles (each holding time of 10 min) on the inactivation of Aspergillus niger spores and in the droplet size of a model emulsion. The obtained model presented goodness of fit to the data with a high correlation coefficient (R2 = 0.91) and adjusted correlation
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New uniaxial pressure cell used in a study of magnetization of the Heusler Ni2MnSn-based alloy High Press. Res. (IF 2.0) Pub Date : 2023-02-01 J. Kamarád, J. Kaštil, M. Míšek, Z. Arnold
ABSTRACT A versatile type of non-magnetic uniaxial pressure cell has been designed for magnetic measurements in SQUID magnetometer. An advanced technology of machining of miniature parts of the cell was used to make new type of an internal squeezer module, where a sample can be compressed by force up to 3 kN in direction perpendicular to external magnetic field. A correct operation of the cell was
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Melting diamond in the diamond cell by laser-flash heating High Press. Res. (IF 2.0) Pub Date : 2022-12-27 L. Yang, A. Karandikar, T. B. Shiell, B. A. Cook, S. Wong, M. R. Field, J. E. Bradby, B. Haberl, D. G. McCulloch, R. Boehler
ABSTRACT The phase behavior of carbon at high pressure and the search for carbon structures denser than diamond has been explored for decades showing large discrepancies, with many fundamental questions remaining unresolved. Here we show evidence of melting above the graphite-diamond-liquid (GDL) triple point (∼13 GPa, 4000 K) up to 50 GPa on samples recovered from single flash-heating events using
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Development of an explicit pressure explicit saturation (EPES) method for modelling dissociation processes of methane hydrate High Press. Res. (IF 2.0) Pub Date : 2022-12-27 Giovanni Luzi, Benedict Prah, Soebiakto Loekman, Bernhard Gatternig, Antonio Delgado
ABSTRACT Methane gas is a fossil clean fuel since the products of the combustion are only carbon hydrate and water. Methane hydrate is a potential source of methane gas. This ice-like methane source can be found in deep seafloors and permafrost regions, characterized by high pressure and low-temperature conditions. In this work, we simulate the process of methane hydrate dissociation by depressurization
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In-situ X-ray diffraction and radiography of iron–silicate–water–sulfur system simulating behaviors of light elements during early Earth’s core–mantle segregation High Press. Res. (IF 2.0) Pub Date : 2022-11-24 Riko Iizuka-Oku, Hirotada Gotou, Akio Suzuki, Hiroyuki Kagi
ABSTRACT The Earth’s iron-rich core contains light elements. Studying the interaction of multiple light elements with iron and silicates during core–mantle segregation process in early Earth evolution has become important. In-situ X-ray diffraction and imaging observations of the iron–silicate–water–sulfur system at 5–10 GPa, up to approximately 1900°C, were used to elucidate sequential reactions:
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Sound velocity anomalies of limestone at high pressure and implications for the mantle wedge High Press. Res. (IF 2.0) Pub Date : 2022-11-12 Fengxia Sun, Ying Li, Qiang He, Lei Liu, Zhigang Wang, Chaowen Xu, Yueju Cui, Yi Zhang, Qingjie Gong, Jianguo Du
ABSTRACT Limestone mainly consisting of CaCO3 is one of the most abundant carbonates on Earth's surface. The sound velocities of limestone at high pressure were determined at room temperature using ultrasonic interferometry in a multi-anvil apparatus. Softening and discontinuities in compressional (P) and shear (S) wave velocities have been observed at around 1.45 GPa due to the phase transition of
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Probing the partitioning behaviour of Xe using in situ X-ray synchrotron techniques at high P–T conditions High Press. Res. (IF 2.0) Pub Date : 2022-11-12 Qi Chen, Chrystèle Sanloup, Hélène Bureau, Igor Rzeplinski, Konstantin Glazyrin, Robert Farla
ABSTRACT Understanding crystal/melt xenon (Xe) partitioning at depth is key to properly trace planetary processes using Xe isotopes. Partition coefficients measured on experimental samples recovered at room pressure (P) and temperature (T) span 6 orders of magnitude, potentially due to Xe exsolution from crystals upon quenching. We chose two in situ synchrotron X-ray methods to investigate Xe crystal/melt
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Investigation of null-matrix alloy gaskets for a diamond-anvil-cell on high pressure neutron diffraction experiments High Press. Res. (IF 2.0) Pub Date : 2022-11-10 Shinichi Machida, Satoshi Nakano
ABSTRACT To investigate a gasket of null-matrix alloys suitable for high pressure neutron diffraction measurements using diamond-anvil-cells (DACs), high pressure experiments were conducted with TiZr and Mn-Cu-Ni-Fe (M2052) alloys as gaskets. The M2052 gasket was retained at least up to 20 and 43 GPa using the flat surface anvils of 1.5 and 1.0 mm culet sizes, respectively, whereas the TiZr gasket
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The structure of sc16 GaP obtained at 17.5 GPa and 1400 K High Press. Res. (IF 2.0) Pub Date : 2022-08-26 B. Lavina, E. Zanardi, A. Mujica, H. Cynn, Y. Meng, J.S. Smith, M. Kong, Y. Lee
ABSTRACT Using a laser-heated diamond anvil cell, a powdered sample of gallium phosphide was compressed to 17.5 GPa and heated up to 1400 K. The material obtained was characterized at room temperature using synchrotron x-ray diffraction. Experimental results were compared with first-principles calculations. The polymorph observed assumes the simple cubic structure (sc16) initially reported for GaAs
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Reassessment of a bond correction method for in situ ultrasonic interferometry on elastic wave velocity measurement under high pressure and high temperature High Press. Res. (IF 2.0) Pub Date : 2022-08-18 Masamichi Noda, Toru Inoue, Taku Tsuchiya, Yuji Higo
ABSTRACT A new bond correction method for simultaneous elastic wave velocity measurement of in situ synchrotron X-ray technique and ultrasonic interferometry combined with a Kawai type multi-anvil apparatus is developed to measure elastic wave velocity precisely. The new method was validated using data from the literature and new elastic constant data of gold obtained under high pressure and high-temperature
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Performances of a VIPA-based spectrometer for Brillouin scattering experiments in the diamond anvil cell under laser heating High Press. Res. (IF 2.0) Pub Date : 2022-08-10 A. Forestier, G. Weck, F. Datchi, P. Loubeyre
ABSTRACT VIPA-based Brillouin spectroscopy is implemented for in-situ measurements at high pressure and temperature in laser-heated diamond anvil cells. Its performances are compared to those of the widely used Tandem Fabry–Perot instrument. A significant reduction of the collection time is in particular enabled. The usefulness of VIPA-Brillouin spectroscopy for High Pressure studies is here illustrated
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The systems KCl–CaCO3 and KCl–MgCO3 at 6 GPa High Press. Res. (IF 2.0) Pub Date : 2022-07-19 Ivan V. Podborodnikov, Anton Shatskiy, Anton V. Arefiev, Altyna Bekhtenova, Konstantin D. Litasov
ABSTRACT Continuous variations in the composition of melt inclusions in diamonds from K-rich saline to carbonatitic indicate their possible genetic relationship. This causes interest in the study of chloride-carbonate systems at high pressure. Here we present experimental data on phase relations in the KCl–CaCO3 and KCl–MgCO3 systems at 6 GPa and 1000–1600 °C. The studied systems have the eutectic
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P-V-T equation of state of α-ScOOH. High Press. Res. (IF 2.0) Pub Date : 2022-06-14 Yoshiaki Ito, Osamu Ikeda, Tatsuya Sakamaki, Takahiro Kuribayashi, Akio Suzuki
ABSTRACT In this study, an in situ X-ray diffraction study of α-ScOOH, scandium oxyhydroxide with a diaspore-type structure, was conducted at a pressure and temperature of up to 4.12 GPa and 700 K, respectively, to determine the pressure-volume-temperature (P-V-T) equation of state (EoS). Using a least-squares fit of the second-order Birch–Murnaghan EoS to the P-V-T data, the EoS parameters of α-ScOOH
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Review: inactivation of very heat-resistant spores of Bacilus sporothermodurans by high pressure treatment combined with others treatments High Press. Res. (IF 2.0) Pub Date : 2022-05-27 Chedia Aouadhi, Mayasar I. Al-zaban, Albandary Nasser Alsaloom, Abderrazak Maaroufi
ABSTRACT Bacillus sporothermoduras spores are known to be very resistant to ultra heat treatment. It is able to germinate and growth in the final product causing the non-sterility of UHT milk. Indeed, the currently used methods for the preservation of dairy products are often not sufficient for the destruction of all the spores potentially present. Faced with the constraint of altering the organoleptic
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Development of a hybrid piston cylinder cell for quasielastic neutron scattering experiments up to 1 GPa High Press. Res. (IF 2.0) Pub Date : 2022-04-30 T. Hattori, S. Ohira-Kawamura, T. Kawasaki
ABSTRACT We have developed a hybrid piston cylinder cell for quasielastic neutron scattering (QENS) experiments up to about 1 GPa. It consists of a fretted cylinder made of the high tensile steel (SNCM439) liner and the Al alloy (NA700) jacket. Performance tests revealed that the cell can withstand a pressure of 0.8 GPa without irreversible damage and has 4.4 times larger neutron transmission at 3
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Progress and prospects for cuprate high temperature superconductors under pressure High Press. Res. (IF 2.0) Pub Date : 2022-04-19 Alexander C. Mark, Juan Carlos Campuzano, Russell J. Hemley
ABSTRACT Since the discovery of high temperature superconductivity in La5−xBaxCu5O5(3−y) at an unprecedented Tc of 35 K over 35 years ago, high pressure experiments have played a critical role in bdeveloping cuprate superconductivity. Soon after its discovery, compression experiments on La5−xBaxCu5O5(3−y) revealed a large dTc/ dP, motivating the study of ‘chemical pressure’ in the material that led
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High pressure neutron diffraction on WAND2 with a Paris-Edinburgh press High Press. Res. (IF 2.0) Pub Date : 2022-04-19 M-E. Donnelly, Y. Wu, E. Kroll, J. J. Molaison, M. Frontzek, B. Haberl
ABSTRACT The Paris-Edinburgh press is a widely available, highly adaptable pressure cell commonly used while collecting neutron scattering data. Here, we detail the use of the VX3 and VX5 Paris-Edinburgh presses on the Wide-Angle Neutron Diffractometer (WAND 2) at the High Flux Isotope Reactor at Oak Ridge National Laboratory. We first give a detailed overview of the instrument setup and alignment
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Amorpheus: a Python-based software for the treatment of X-ray scattering data of amorphous and liquid systems High Press. Res. (IF 2.0) Pub Date : 2022-03-28 S. Boccato, Y. Garino, G. Morard, B. Zhao, F. Xu, C. Sanloup, A. King, N. Guignot, A. Clark, G. Garbarino, M. Morand, D. Antonangeli
ABSTRACT The diffuse scattering signal of amorphous or liquid systems contains information on the local atomic structure, and this can be related to the density, compressibility, thermal expansion and other thermoelastic properties. However, the analysis and full exploitation of the diffuse scattering signal, in particular for systems under extreme conditions of high pressures and temperatures are
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Effect of high hydrostatic pressure treatment with room-temperature ionic liquid 1-ethyl-3-methylimidazolium acetate - dimethyl sulfoxide mixture on lipid extraction from Chlorella vulgaris High Press. Res. (IF 2.0) Pub Date : 2022-03-11 Yuki Kojima, Akio Shimizu
ABSTRACT In this study, Chlorella vulgaris (C. vulgaris) was immersed in a mixture of 1-ethyl-3-methylimidazolium acetate and dimethyl sulfoxide, and treated hydrostatically at 0.1-250 MPa. For the first time, the relationship between the amount of lipids and fatty acids and high hydrostatic pressure was investigated, as well as the relationship between the amount of fatty acids and the morphology
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Improvement of nano-polycrystalline diamond anvil cells with Zr-based bulk metallic glass cylinder for higher pressures: application to Laue-TOF diffractometer High Press. Res. (IF 2.0) Pub Date : 2022-03-11 Keishiro Yamashita, Kazuki Komatsu, Takashi Ohhara, Koji Munakata, Tetsuo Irifune, Toru Shinmei, Kazumasa Sugiyama, Toru Kawamata, Hiroyuki Kagi
ABSTRACT Single-crystal neutron diffraction provides direct information about crystal structures such as hydrogen positions and magnetic structures. However, in-situ experiments conducted under high pressure entail technical difficulties such as attenuation correction, masking of parasitic diffraction, and limitations of sample volumes and accessible directions. For this study, we improved diamond
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High pressure photoluminescence of bismuth-doped yttria-alumina-silica glass High Press. Res. (IF 2.0) Pub Date : 2022-02-27 Mark A. Hughes, Robert McMaster, John E. Proctor, Daniel W. Hewak, Takenobu Suzuki, Yasutake Ohishi
ABSTRACT We report the effects of high pressure, up to 10.45 GPa, on the photoluminescence of Bi-doped yttria-alumina-silica glass under 532 nm excitation. We identify three emission bands attributed to Bi3+, Bi+ and a NIR emitting Bi centre, BiNIR. As the pressure is increased up to ∼6 GPa, an irreversible discontinuity in the trend for emission band energies indicates that an irreversible structural
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Measurement of shock and re-shock Hugoniot data of liquid nitrogen High Press. Res. (IF 2.0) Pub Date : 2022-02-04 Muhammad Sabeeh Akram, Shumail Sattar, Zhuo-Ning Fan, Qi-Jun Liu, Fu-Sheng Liu
ABSTRACT In this work, the equation-of-state data for liquid nitrogen shock compressed to 43 GPa along the principal Hugoniot and reflected-shock data up to 91 GPa were reported. A cryogenic target was used to liquefy the gas that was then further compressed by high-speed impactors. The first- and second-shock states were observed by a high-precision Doppler pin system (DPS). Optical wavefrom of DPS
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High pressure structural phase transitions in Dysprosium to 202 GPa High Press. Res. (IF 2.0) Pub Date : 2022-01-17 Kevin M. Hope, Christopher S. Perreault, Yogesh K. Vohra
ABSTRACT High pressure structural phase transitions in heavy lanthanide metal Dysprosium (Dy) have been studied to 202 GPa (Volume Compression V/V0=0.36) in a diamond anvil cell employing copper as an internal x-ray pressure standard. The previously assigned monoclinic (C2/m) phase above 72 GPa has been reexamined and assigned to an orthorhombic phase with sixteen atoms per cell (oF16) based on structural
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Three-wall piston-cylinder type pressure cell for muon-spin rotation/relaxation experiments High Press. Res. (IF 2.0) Pub Date : 2021-12-16 Rustem Khasanov, Ross Urquhart, Matthias Elender, Konstantin Kamenev
ABSTRACT A three-wall piston-cylinder type high pressure cell for muon-spin rotation/relaxation experiments was designed, manufactured, tested and commissioned. The outer cylinder of the cell body is made from MP35N and the middle and inner cylinders are made from NiCrAl nonmagnetic alloys. The mechanical design and performance of the pressure cell are evaluated and optimised using finite-element analysis
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High pressure effect in the near-infrared emission of Nd3+-doped alkali silicate glasses High Press. Res. (IF 2.0) Pub Date : 2021-12-16 Israel Montoya Matos, Naira Maria Balzaretti
ABSTRACT The effect of high pressure (7.7 GPa) densification on the absorption and near-infrared emission of Nd-doped lithium, sodium and potassium disilicate glasses was investigated. Judd-Ofelt parameters Ωλ (λ = 2, 4 and 6) were calculated from the absorption spectra, before and after densification of glasses, indicating that the irreversible structural changes induced by pressure increased the
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Exploration of the best reference material on anelastic measurement by cyclic loading under high pressure High Press. Res. (IF 2.0) Pub Date : 2021-12-13 Chao Liu, Takashi Yoshino, Daisuke Yamazaki, Noriyoshi Tsujino, Hitoshi Gomi, Moe Sakurai, Youyue Zhang, Ran Wang, Longli Guan, Kayan Lau, Yoshinori Tange, Yuji Higo
ABSTRACT Anelastic measurement by cyclic loading under high pressure has been developed by means of in situ X-ray observation at a synchrotron facility. In this method, the reference material is a key factor to precisely determine attenuation and moduli of unknown materials. We compared the performance of three types of reference materials (dense polycrystalline alumina, alumina single-crystal parallel
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A new model to determine the shear modulus and Poisson's ratio of shock-compressed metals up to the melting point High Press. Res. (IF 2.0) Pub Date : 2021-09-13 E. I. Kraus, I. I. Shabalin
ABSTRACT In this paper, using the few-parametric equation of state, an approach is implemented to the calculation of the longitudinal and bulk sound speeds, as well as the elastic moduli of a number of isotropic metals behind the front of a strong shock wave. The results of theoretical calculations for aluminum are compared with the available shock impact experimental data. A new analytical approximation
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Yield strength and hardness of micron-sized powders measured in the diamond cell High Press. Res. (IF 2.0) Pub Date : 2021-10-11 L. Chudinovskikh, R. Boehler
ABSTRACT When powders of polycrystalline transparent materials are compressed in the diamond cell, they undergo a change from translucent to transparent. This effect is due to plastic deformation of the grains leading to a reduction in the size of voids responsible for light scattering. The pressures of the onset and saturation of the optical transmission corelate respectively well with the previously
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Density and elastic properties of liquid gallium up to 10 GPa using X-ray absorption method combined with externally heated diamond anvil cell High Press. Res. (IF 2.0) Pub Date : 2021-11-08 Ryo Tsuruoka, Hidenori Terasaki, Seiji Kamada, Fumiya Maeda, Tadashi Kondo, Naohisa Hirao, Saori I. Kawaguchi, Iori Yamada, Satoru Urakawa, Akihiko Machida
ABSTRACT The density of liquid metals at high pressure and high-temperature provides fundamental and important information for understanding their compression behavior and elastic properties. In this study, the densities of liquid gallium (Ga) were measured up to 10 GPa and 533 K using the X-ray absorption method combined with an externally heated diamond anvil cell. The elastic properties (the isothermal
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Phase relations in the Fe-Fe3C-Fe3N system at 7.8 GPa and 1150°C: implications for C and N hosts in metal-saturated mantle High Press. Res. (IF 2.0) Pub Date : 2021-11-05 Alexey N. Kruk, Alexander A. Korablin, Alexander G. Sokol, Yury N. Palyanov
ABSTRACT The isothermal section of the Fe-Fe3C-Fe3N phase diagram at 7.8 GPa and 1150°С comprises a three-phase field of γ-Fe + Fe3C + ϵ-Fe3(С/N) in the central part and three two-phase fields (γ-Fe + Fe3C, γ-Fe + ϵ-Fe3 (С/N) and Fe3C + ϵ-Fe3(С/N)) bounded by three single-phase fields of γ-Fe, Fe3C and ϵ-Fe3(С/N) solid solutions along the triangle sides. Thus, native iron can host carbon and nitrogen
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Effect of hydrostatic pressure on magneto-crystalline anisotropy of Heusler Ni2MnSn-based alloy High Press. Res. (IF 2.0) Pub Date : 2021-11-11 J. Kamarád, J. Kaštil, M. Friák, M. Mazalová, O. Schneeweiss, Z. Arnold
ABSTRACT Single crystal of the stoichiometric Ni2MnSn alloy (cubic L21 crystal structure) was prepared by the Czochralski method. The values of the magneto-crystalline anisotropy constant K1 have been determined at temperature 10 K under ambient and high hydrostatic pressures, K1 = + 0.17 × 104 and +1.96 × 104 J/m3 (0.7 GPa), respectively. The pressure-induced decrease of magnetization was confirmed
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Vacuum impregnation of apple assisted by high hydrostatic pressure High Press. Res. (IF 2.0) Pub Date : 2021-10-07 Ming Gao, Kazuki Nomura, Yasumasa Ando, Yoshiko Nakaura, Zhenya Zhang, Kazutaka Yamamoto
ABSTRACT Apple was impregnated with pigment solution by vacuum heat sealing (VS) and/or high hydrostatic pressure treatment (HHP; 100-600 MPa, 25°C, 5 min). Impregnation efficacy was evaluated as impregnation ratio (%) by image analysis, while damages of cell membrane and texture were quantified by electrical impedance spectroscopy and texture analysis, respectively. Combinations of VS and HHP exclusively
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Elastic properties of Mg-phase D at high pressure High Press. Res. (IF 2.0) Pub Date : 2021-07-26 Chaowen Xu, Ying Li, Toru Inoue, Steeve Gréaux, Qingze Li, Jing Gao, Fengxia Sun, Leiming Fang
ABSTRACT The sound velocities of polycrystalline Mg-phase D were investigated at the pressure up to 13.6 GPa and room temperature, using ultrasonic interferometry in a multi-anvil apparatus. The P (VP) and S (VS) wave velocities obtained at ambient conditions produced the results of VP = 9.26(3) km/s and VS = 5.46(1) km/s. The results are in accordance with the values for Mg-phase D by Brillouin scattering
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High pressure stability of β-Zr: no evidence for isostructural phase transitions High Press. Res. (IF 2.0) Pub Date : 2021-07-30 E. F. O’Bannon III, P. Söderlind, D. S. Sneed, M. J. Lipp, H. Cynn, J. S. Smith, C. Park, Zs. Jenei
ABSTRACT Isostructural transitions have been reported to occur in several pure elements; however, most of these have been disproven. Zr is one of those elements which remains controversial with two reports of an isostructural bcc-to-bcc transition at ∼56–60 GPa at an ambient temperature and a more recent report proposing a second bcc-to-bcc transition at 110 GPa. Here, we report a detailed experimental