高压物理学报

Pressure Effects on the Behavior of Helium in Niobium

LIU Zhi-Ming, CUI Tian, HE Wen-Jong, ZOU Guang-Tian, WEI Meng-Fu, CHEN Chang-An

2008, 22(3): 225-231 . doi: 10.11858/gywlxb.2008.03.001

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Abstract:
By combining pseudopotential plane-wave method at 0 K with Car-Parrinello molecular dynamics at finite temperature, the behavior and aggregation of helium in niobium are simulated under different pressures. The result shows that the closed-shell helium atom plays a role of rigid-ball such that to de...

The Electrodes Factor of Accurate Resistivity Measurement with Four-Point Probe Method in a Diamond Anvil Cell

WU Bao-Jia, HAN Yong-Hao, CUI Xiao-Yan, LIU Cai-Long, WANG Yue, PENG Gang, GAO Chun-Xiao

2008, 22(3): 232-236 . doi: 10.11858/gywlxb.2008.03.002

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Abstract:
To figure out the effect of electrode resistivity on the in situ resistivity measurement with four-point probe method in a diamond anvil cell (DAC), the authors simulated the distribution of the steady electric field in the sample with finite element analysis (FEA). It reveals that the electrode res...

Experimental Study on Electrical Conductivity of Biotite- and Plagioclase-Bearing Gneiss at High Temperature and High Pressure

HUANG Xiao-Ge, BAI Wu-Ming, ZHOU Wen-Ge

2008, 22(3): 237-244 . doi: 10.11858/gywlxb.2008.03.003

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Abstract:
We have investigated the electrical properties of rock sample from Yinshan orogenic zone by in situ complex impedance spectroscopy using a multianvil apparatus. The electrical conductivity was measured at pressure of 1 GPa and temperature from 250 ℃ to 1 100 ℃ at frequencies from 0.1 Hz to 1 MHz. Th...

Numerical Simulation and Analysis of the Penetration of Tungsten-Alloy Long Rod into Semi-Infinite Armor Steel Targets

LAN Bin, WEN He-Ming

2008, 22(3): 245-252 . doi: 10.11858/gywlxb.2008.03.004

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Abstract:
Numerical simulation of the penetration of tungsten alloy long rod into semi-infinite armor steel targets is performed with ALE method and Steinberg constitutive model coupled in ANSYS/LS-DYNA finite element code. The configurations of four different phases in the penetration process and the changes...

Mechanical Properties of Transition-Metal Osmium under High Pressure

LIU Xiao-Mei, LIANG Yong-Cheng, SONG Qiu-Hong

2008, 22(3): 253-258 . doi: 10.11858/gywlxb.2008.03.005

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Abstract:
The equation of states, elastic constants and other mechanical properties of transition-metal osmium under high-pressure are studied by the first-principles plane-wave pseudopotential calculations based on the density functional theory (DFT). The calculated results indicate that osmium has high bulk...

High Pressure-Induced Changes of Physico-Chemical Properties and Mutagenesis in Aspergillus Oryzae

WANG Hua, SHEN Si-Le, LI Zhi-Hui, CUI Hang, WANG Yan-Feng, FU Xin-Xin, YANG Fan, CHANG Liang, ZHENG Xiao-Yi, ZOU Guang-Tian

2008, 22(3): 259-264 . doi: 10.11858/gywlxb.2008.03.006

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Abstract:
In order to study the pressure-induced changes of biological and physiochemical properties in fungi, Aspergillus Oryzae was treated with high pressure at 0.1~400 MPa for 20 min, and their viability and modality, as well as the activity of protease and amylase were determined. The result showed that ...

Investigation on Grain Boundaries and Related Abradability of Diamond Thick Films

JIANG Zhi-Gang, FENG Yu-Ling, ZHENG Tao, LI Hong-Dong, LI Bo, ZHENG Yan-Bin, LIN Zhi-Wei

2008, 22(3): 265-268 . doi: 10.11858/gywlxb.2008.03.007

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Abstract:
The polished cross-section of the diamond thick films deposited by direct current glow discharge plasma was etched by hydrogen microwave plasma. The grain boundaries and the defects in the films have been directly observed using scanning electron microscopy (SEM). It is found that the non-diamond im...

Numerical Simulation for Rayleigh-Taylor Instability Using Runge-Kutta Discontinuous Finite Element Method

CHEN Er-Yun, LE Gui-Gao, MA Da-Wei, ZHAO Gai-Ping, ZHAO Ji-Yong

2008, 22(3): 269-274 . doi: 10.11858/gywlxb.2008.03.008

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Abstract:
Rayleigh-Taylor instability problem is simulated by using discontinuous finite element method which is developed for Euler equations with an additional body force corresponding to the gravity. Level set method for capturing moving interfaces and ghost fluid method with Isobaric fix for disposing the...

Study on 3D Computational Method by Coupling SPH Algorithm to Rigid Body Solution

LIANG Long-He, DONG Shi-Shun, WANG Zheng

2008, 22(3): 275-280 . doi: 10.11858/gywlxb.2008.03.009

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Abstract:
The 3D computational method and technique were studied by coupling SPH algorithm to rigid body solution. Based on the new method and technique, and combining with the Johnson-Cook, Johnson-Holmquist contitutive models, as well as the existing 3D synthetical Lagrangian finite element code CL3D, a new...

Acoustic Velocity of Water under High Temperature and High Pressure: Validity of the Equation of State of Water

LI Fang-Fei, CUI Qi-Liang, LI Min, ZHOU Qiang, ZOU Guang-Tian

2008, 22(3): 281-285 . doi: 10.11858/gywlxb.2008.03.010

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Abstract:
The knowledge of the thermodynamic equation of state of fluid water plays an important role in understanding of many phenomena within the purview of the earth and planetary sciences. However, data are sparse in the high temperature and high pressure region and most equations of state for water, at h...

The Velocity and Elastic Constants in Fluid Oxygen under High Pressures and High Temperature

LI Min, CUI Qi-Liang, LI Fang-Fei, ZHOU Qiang, WU Xiao-Xin, ZOU Guang-Tian

2008, 22(3): 286-290 . doi: 10.11858/gywlxb.2008.03.011

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Abstract:
We applied the Brillouin scattering and diamond-anvil cell (DAC) technique to study the liquid oxygen at high pressure and high temperature. The singlefrequency green (532 nm) laser was used as Brillouin excitation source, and the Brillouin spectra were collected by a newly developed 3+3 pass tande...

Numerical Method of Simulating Underwater Explosion on Unstructured Moving Grids

WANG Bing, XU Hou-Qian, TAN Jun-Jie

2008, 22(3): 291-297 . doi: 10.11858/gywlxb.2008.03.012

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Abstract:
The computation of underwater explosion model with a gas-water interface is discussed where the interface is considered as a special internal boundary. This boundary is represented as doubled-defined points and each point corresponds to one material. The HLLC (Harten, Lax, van Leer, Contact) scheme ...

Two-Dimensional Numerical Simulation of Gas/Liquid Interface Instability

WANG Tao, BAI Jing-Song, LI Ping

2008, 22(3): 298-304 . doi: 10.11858/gywlxb.2008.03.013

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Abstract:
On the basis of multi-fluid volume fraction (VOF) and piecewise parabolic method (PPM), a multi-fluid hydrodynamic program MFPPM (Multi-Fluid Piecewise Parabolic Method) was developed and performed to study the Richtmyer-Meshkov instability of gas/liquid interface. The influences of initial perturba...

X-Ray Diffraction Investigation of Pyrope under Pressure

MA Yan-Mei, PENG Gang, LI Min, LI Xue-Fei, GAO Ling-Ling, CUI Qi-Liang, ZOU Guang-Tian

2008, 22(3): 305-308 . doi: 10.11858/gywlxb.2008.03.014

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Abstract:
The in situ angle dispersive X-ray powder diffraction of natural pyrope collected from Zhenyuan in China using synchrotron radiation has been measured under high pressure (0~ 25.3 GPa) conditions with diamond anvil cell (DAC). We have not found any convincing evidence for a phase transformation in t...

Field Emission Characteristics of Boron Nitride Film Deposited on Dimond Film Substrate

LIU Li-Hua, LI Ying-Ai, GU Guang-Rui, ZHAO Yong-Nian

2008, 22(3): 309-312 . doi: 10.11858/gywlxb.2008.03.015

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Abstract:
Boron nitride (BN) thin film on diamond film substrate was synthesized by radio frequency (rf) magnetic sputtering physical vapor deposition. The field emission characteristics of diamond film and BN coated diamond film were measured in an ultrahigh vacuum system. Experiments demonstrate that BN fil...

Shock Synthesis of PZT 95/5 Powder by Planar Devices

TENG Hua, YANG Shi-Yuan, HE Hong-Liang, TANG Jing-You, WANG Jun-Xia

2008, 22(3): 313-317 . doi: 10.11858/gywlxb.2008.03.016

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Abstract:
Homogeneous submicron PZT 95/5 powder was synthesized from the mixtures of Pb3O4, ZrO2 and TiO2 with Nb2O5 as an additive by a planar shock wave loading device. The impact velocities of flyer plates on sample targets were adjusted by their thickness to obtain different shock conditions and to achiev...

Effect of High Pressure and Heat Treatment on Microstructure of Aluminum Bronze

YANG Jing-Ru, LIU Lin, REN Yan-Jun, LIU Jian-Hua, ZHANG Rui-Jun

2008, 22(3): 318-322 . doi: 10.11858/gywlxb.2008.03.017

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Abstract:
The effects of high pressure and heat treatment on microstructure of aluminum bronze were investigated by means of metallographic, scanning electronic microscope (SEM)/energy disersive spectrometer (EDS) and X-ray diffraction (XRD). Results showed that the grain size of phase in the aluminum bronze ...

Primary Research on Side Pressure of Cylindrical TNT at Underwater Explosive Close-Field

ZHAO Ji-Bo, TAN Duo-Wang, LI Jin-He, ZHANG Guang-Sheng, ZENG Hua-Long

2008, 22(3): 323-328 . doi: 10.11858/gywlxb.2008.03.018

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Abstract:
According to the non-sphericity characteristic of shock wave surface at close-field after cylindrical charge with end boost exploring under water, the propagation of shock near-field is recorded by frame camera within 36 s after blasting, and the shape of shock on diverse time and situation is analy...

Calculation of the Hugoniot of Unreacted Explosives

FU Hua, LI Jin-He, TAN Duo-Wang, LI Tao

2008, 22(3): 329-332 . doi: 10.11858/gywlxb.2008.03.019

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Abstract:
With considering unreacted explosives as composite and porous materials media, the shock Hugoniot of several typical explosives are calculated by using plus principle and calculation method of the Hugoniot of porous materials. The calculation results are in good agreement with the experimental data.

The Behavior of Diaspore under High Pressure and High Temperature

LI Ming, LI Li-Xin, YANG Wu-Ming, ZHANG Pei-Feng, GAO Chun-Xiao, HE Chun-Yuan, HAO Ai-Min, LI Yan-Chun, LI Xiao-Dong, LIU Jing, et al

2008, 22(3): 333-336 . doi: 10.11858/gywlxb.2008.03.020

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Abstract:
The high heat conductivity and the high temperature carbonization of diamond make it difficult to achieve high temperature on diamond anvil cell, and the temperature in sample chamber is difficult to control accurately. Here we used sputtered alumina film as heat resistant layer, and an experiment a...

2008 Vol. 22, No. 3

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