高压物理学报

A New Material for High-Pressure Anvil: Moissanite Gemstone

XIE Hong-Sen, XU Ji-An, ZHOU Wen-Ge

2004, 18(1): 1-3 . doi: 10.11858/gywlxb.2004.01.001

PDF (850)

Abstract:
History, synthesis method and main physical parameters of moissanite gemstone are described. Comparing to other synthetic gemstone (such as corundum, cubic zirconia), the moissanite gemstone is suitable for high-pressure anvil. The advantages and prospects of moissanite anvil cell for high-temperatu...

The High Pressure Synthesis and Properties of Apical Oxygen Doped High Tc Superconductors

JIN Chang-Qing

2004, 18(1): 4-9 . doi: 10.11858/gywlxb.2004.01.002

PDF (905)

Abstract:
The (Sr,Ca)n+1CunO2n(Cl,O)2 superconducting homologous series have been briefly introduced. The emphasis is on the special charge reservoir block of the oxyhalide high Tc superconductror (HTSC), which consists of the halide layer instead of the routine oxide layer. Consequently the apical oxygen rel...

Differential Equations and Their Solutions for Hugoniot Relation of Porous Materials along the Isobaric Path

LIU Fu-Sheng, JING Fu-Qian

2004, 18(1): 10-16 . doi: 10.11858/gywlxb.2004.01.003

PDF (829)

Abstract:
Shock compression techniques can be applied to porous materials to reproduce thermodynamic states at high temperatures and high densities, and a lot of Hugoniot data were published in the past two decades. To investigate the intrinsic relationship between Hugoniot curves of dense metals and porous o...

The Effect of Water on the Synthesis of Cubic Boron Nitride Crystal in the System of Mg-hBN

ZHANG Tie-Chen, WANG Xian-Cheng, DU Yong-Hui, SU Zuo-Peng, ZOU Guang-Tian

2004, 18(1): 17-20 . doi: 10.11858/gywlxb.2004.01.004

PDF (766)

Abstract:
Synthesis of cubic boron nitride (cBN) crystal in the system of Mg-hBN with water, in the form of free or bonded, was investigated under the pressure and temperature of 4.5~5.5 GPa and 1 400~1 800 ℃. Results indicate that the form and the amount of water have important effect on the colour, the nucl...

Experimental Investigation and DEM Simulation of Mass Mixing under Shock Loading

GONG Ping, TANG Zhi-Ping, SHEN Zhao-Wu

2004, 18(1): 21-26 . doi: 10.11858/gywlxb.2004.01.005

PDF (808)

Abstract:
Tin and lead beads are chosen to conduct the high velocity impact experiments with an explosive plane wave generator. The impact velocity is about 2 km/s. A metallurgic picture of the recovered specimen shows that there are four bands along the interfaces between tin and lead. The width across the b...

The Extent and Crystal Structure of the Solid Solution Based on Ca2Pr2Cu5O10

SONG Gong-Bao, HAN Cang-Qiong, LIANG Jing-Kui, RAO Guang-Hui

2004, 18(1): 27-35 . doi: 10.11858/gywlxb.2004.01.006

PDF (785)

Abstract:
The extent and crystal structure of the solid solution based on Ca2Pr2Cu5O10 were studied by X-ray diffraction combined with Rietveld structure refinement. According to the principle of valence neutralization and the disappearing-phase method, in the Ca-rich region (i.e. Ca/Pr1) the composition of s...

Effect of Preparation Pressure on Magnetoresistance of La2/3Sr1/3MnO3

TANG Yan-Kun, SUI Yu, QIAN Zheng-Nan, LIU Yu-Qiang, XU Da-Peng, SU Wen-Hui

2004, 18(1): 36-39 . doi: 10.11858/gywlxb.2004.01.007

PDF (827)

Abstract:
The effect of preparation pressure on the structural, magnetic and electronic properties has been investigated for nanostructured bulk samples of La2/3Sr1/3MnO3. The results show that the grain size decreases and magnetoresistance varies with preparation pressure growth. Low-field magnetoresistance ...

Two-Dimensional Simulation of Transient Detonation Process for H2-O2-N2 Mixture

DONG Gang, FAN Bao-Chun, XIE Bo

2004, 18(1): 40-46 . doi: 10.11858/gywlxb.2004.01.008

PDF (1037)

Abstract:
By solving the two-dimensional Euler equations coupled with the chemistry, a numerical simulation of transient detonation process induced by flame for H2-O2-N2 mixture was performed, and a detailed chemical mechanism for H2-O2-N2 system, which included 19 element reactions and 9 species, was involve...

Numerical Simulation of Debris Cloud Produced by Hypervelocity Impact of Projectile on Bumper

ZHANG Wei, PANG Bao-Jun, JIA Bin, QU Yan-Zhe

2004, 18(1): 47-52 . doi: 10.11858/gywlxb.2004.01.009

PDF (957)

Abstract:
All spacecraft in low orbit are subject to hypervelocity impacts by meteoroids and space debris. These impacts can damage spacecraft flight-critical systems, which can in turn lead to catastrophic failure of the spacecraft. In order to ensure the astronauts safety and spacecraft normal operation, th...

Diffusion and Infiltration Mechanisms of Cobalt through Diamond Layer during the Sintering of Polycrystalline Diamond Compacts

DENG Fu-Ming, CHEN Qi-Wu

2004, 18(1): 53-58 . doi: 10.11858/gywlxb.2004.01.010

PDF (927)

Abstract:
The mechanisms of solid cobalt diffusion, molten cobalt infiltration and two wave-like cobalt peaks movement through diamond layer during the sintering process were discussed theoretically according to the experiment data. Results show that the solid cobalt diffusion coefficient under 5.8 GPa and at...

Studies on the Equilibrium State of Mixture Following Shock Compression

LIN Hua-Ling, HUANG Feng-Lei, HU Yu-Xin, YU Wan-Rui, FANG Jian-Qing

2004, 18(1): 59-69 . doi: 10.11858/gywlxb.2004.01.011

PDF (741)

Abstract:
The mixture is as a randomly distributed component grains in three-dimensional meshes. The shock compression behavior of mixtures is simulated numerically by using the 3D thermodynamics finite element method. We have studied the course of tendency to the thermodynamic equilibrium, the characteristic...

Influence of Ultra High Pressure (UHP) on Micro-organisms in Watermelon Juice

ZENG Qing-Mei, PAN Jian, XIE Hui-Ming, YANG Yi, XU Hui-Qun

2004, 18(1): 70-74 . doi: 10.11858/gywlxb.2004.01.012

PDF (968)

Abstract:
The relation between the survivors of micro-organisms and the processing pressure and the pulse pressure processing was investigated in UHP treatment to watermelon juice. And species of baroduric bacteria were discriminated. Processing pressure is between the atmosphire pressure and 500 MPa, and the...

Isothermal Equation of State of Aluminium

ZHANG Jian, XIE Yan-Wu, PAN Yue-Wu, JIAO Hu-Jun, DAI Quan-Qin, CUI Qi-Liang, LIU Jing, ZOU Guang-Tian

2004, 18(1): 75-77 . doi: 10.11858/gywlxb.2004.01.013

PDF (626)

Abstract:
We have studied the equation of state (EOS) of aluminium by using energy dispersive synchrotron radiation X-ray diffraction technique at room temperature under in situ pressures up to 21.5 GPa. The data were fitted to Murnaghan equation of state and gave the bulk modulus and its first order derivati...

Comment on the Pressure Gauge for the Experiments at High Temperature and High Pressure with DAC

ZHENG Hai-Fei, SUN Qiang, ZHAO Jin, DUAN Ti-Yu

2004, 18(1): 78-82 . doi: 10.11858/gywlxb.2004.01.014

PDF (1111)

Abstract:
As a pressure gauge, Ruby is the most common and wildly used mineral for determining pressure in DAC experiments, but it has difficulty in such an experiment that simultaneously contains high temperature and water. Quartz is a new mineral proposed recently as a pressure gauge and it can be used with...

Effects of W Diffusion Barrier Layer for Diamond Coatings Deposited on WC-Co Substrates

WANG Chuan-Xin, WANG Jian-Hua, MAN Wei-Dong, MA Zhi-Bin, WANG Sheng-Gao, KANG Zhi-Cheng

2004, 18(1): 83-89 . doi: 10.11858/gywlxb.2004.01.015

PDF (771)

Abstract:
Two different W interlay/substrate bonding interfaces for the adhesion of diamond film deposited on WC-Co substrate were investigated using bias enhancing nucleation method, in microwave plasma enhanced chemical vapor deposition (MWCVD) device. The results indicate that hydrogen plasma decarburizati...

Research on Piezoresistance Sensitivity of Yb Film Sensor

TENG Lin, YANG Bang-Chao, DU Xiao-Song, ZHOU Hong-Ren, CUI Hong-Ling, XIAO Qing-Guo

2004, 18(1): 90-93 . doi: 10.11858/gywlxb.2004.01.016

PDF (954)

Abstract:
Yb film sensor was fabricated by vacuum evaporation technique, and its performance has been studied under the longitudinal quasi-static loading in the range of 1 GPa. The comparison of two group Yb film sensors, one is unheated treatment and the other is heat treatment at 300 ℃ for 1 h in vacuum, in...

Measurement of the Precursor Gas Accompanied with the Launch of Two-Stage Gas Gun

WANG Wei, WANG Xiang

2004, 18(1): 94-96 . doi: 10.11858/gywlxb.2004.01.017

PDF (925)

Abstract:
During the launch of hypervelocity projectile in the two-stage light gas gun, the remanent gas in target chamber and the pushing gas that leaks through the projectile might disturb the physical measurement of target sample. In this paper quartz gauges were used to detect whether the influence of suc...

2004 Vol. 18, No. 1

Login in

NewsMore

LinksMore