Notice on the organization of advanced research class on high-pressure science and new materials of engineering knowledge of professional and technical personnel Notice on the organization of advanced research class on high-pressure science and new materials of engineering knowledge of professional and technical personnel

2004 Vol. 18, No. 4

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Molecular Analysis of Stable Mutagenesis Rice Cultivar Induced by High Hydrostatic Pressure
SHEN Si-Le, XU Shi-Ping, WENG Ke-Nan, TAN Mei, ZHANG Jian-Feng, LONG Guo-Hui, JIA Xiao-Peng, CHI Yuan-Bin, LIU Bao, ZOU Guang-Tian
2004, 18(4): 289-294 . doi: 10.11858/gywlxb.2004.04.001
PDF (978)
Abstract:
By using high hydrostatic pressure treatment, two genetically stable rice lines were obtained from the japonica rice cultivar Bijing 38. Mutant 1 is characterized by its lower segregation frequency and 20 d less of maturation period than the original cultivar. Mutant 2 is characterized by its signif...
Numerical Simulation of the Instability of the Jelly Surfaces under the Imploding Drives
BAI Jing-Song, LI Ping, CHEN Sen-Hua, LIAO Hai-Dong, YANG Li-Bing, JIANG Yang
2004, 18(4): 295-301 . doi: 10.11858/gywlxb.2004.04.002
PDF (860)
Abstract:
In this paper, we applied the high-resolution compressible multi-fluid PPM method to simulation of the instability of the jelly surfaces under the imploding drives. The outer and the inner surfaces of the jelly are set initially by model 10, 1 mm in top-top and top-bottom disturbance amplitude. Shap...
A Theoretical Study on the Penetration of Rocks Struck by Rigid Projectiles
WEN He-Ming, XU Hai-Bin
2004, 18(4): 302-308 . doi: 10.11858/gywlxb.2004.04.003
PDF (881)
Abstract:
Rocks as natural building materials have been widely used in protective engineering and military fortification/installations. Hence, it is of great significance to carry out studies on the penetration of rock targets by projectiles. This paper contains two parts. The first part is an overview of the...
Subsolidus Phase Relation and Crystal Structure in the Pr1-xBa2-yCax+yCu3O7 System
SONG Gong-Bao, LIANG Jing-Kui, RAO Guang-Hui
2004, 18(4): 309-314 . doi: 10.11858/gywlxb.2004.04.004
PDF (848)
Abstract:
Subsolidus phase relation and crystal structure in the Pr1-xBa2-yCax+yCu3O7 system were studied by X-ray diffraction combined with Rietveld structure refinement. The results indicate that all of the Pr1-xBa2-yCax+yCu3O7 (y=0) samples contain a BaCuO2 phase besides the Pr123 (PrBa2Cu3O7) phase under ...
Experimental Study on Hypervelocity Flyer Driven by Strong Detonation at Low Vacuum Conditions
WEN Shang-Gang, ZHAO Feng, SUN Cheng-Wei, DENG Wen-Rong, ZHANG Zhen-Tao, PANG Yong, HUANG Wen-Bin, ZHANG Xiao-Lin
2004, 18(4): 315-318 . doi: 10.11858/gywlxb.2004.04.005
PDF (836)
Abstract:
The problem of accelerating metallic flyers to ultra-high speed by multi-stage detonation system at low vacuum conditions is studied in this paper by means of X-rays photography and electrical-pins technique. The pictures of the secondary flyer impacting static target at different time are obtained....
Molecular Dynamic Study of Liquid Nitromethane under High-Pressure
LIU Hong, WEI Dong-Qing, ZHAO Ji-Jun, GUO Yong-Xin, GONG Zi-Zheng
2004, 18(4): 319-327 . doi: 10.11858/gywlxb.2004.04.006
PDF (787)
Abstract:
The thermodynamic properties of liquid nitromethane under high-pressure have been determined using molecular dynamic (MD) simulations based on classical empirical potentials and first-principles Car-Parrinello method (CPMD). Classical MD simulations were carried out to study the structural and therm...
Research on Dynamic Compressive Testing and Mechanical Properties of Silicon Rubber
ZHAO Xi-Jin, LU Fang-Yun, LIN Yu-Liang
2004, 18(4): 328-332 . doi: 10.11858/gywlxb.2004.04.007
PDF (994)
Abstract:
By use of split Hopkinson pressure bars (SHPB) technique, a kind of silicon rubber is investigated for understanding its dynamic constitutive behaviors at high strain rates. Experimental results show that silicon rubber is strain-rate sensitive. It shows viscoelastic characteristics at room temperat...
Self-Consistent Field Calculation of Electron Pressure for Dense Plasmas with Medium-Low Temperature
ZHU Xi-Rui, MENG Xu-Jun
2004, 18(4): 333-338 . doi: 10.11858/gywlxb.2004.04.008
PDF (798)
Abstract:
Criterion for determining free electrons in general SCF average atomic model is revised to describe well the existence of the potential in condensed matter, and, partial wave and Fermi-Dirac statistics are employed for dealing with the resonant electrons and free electrons, individually. The electro...
Magnetic Behavior of Oxygen-Doped T-R2CuO4 (R=Nd~Tm) at Low Temperature
WU Yun-Long, XIONG Yu-Feng, DAI Wen, LI Ke-Qiang, YAO Yu-Shu, JIN Duo
2004, 18(4): 339-344 . doi: 10.11858/gywlxb.2004.04.009
PDF (799)
Abstract:
The weak ferromagnetic behavior arises from the size effects, which gives rise to the distortion of the T-R2CuO4 structure. In this paper, we study magnetic properties on rare-earth cuprates, R2CuO4 (R=Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Tm), synthesized under high oxygen pressure (6 GPa) at elevated...
An Investigation on the Entropy Argument in Detonation Models
HU Shao-Ming, LI Chen-Fang
2004, 18(4): 345-352 . doi: 10.11858/gywlxb.2004.04.010
PDF (853)
Abstract:
Detonation science has been annoyed for a long time with the argument that the entropy has a minimum at the process end of detonation models. Neglecting thermodynamics, Newton mechanics that is invariant for the substitution t-t may create thermodynamic mistake in describing detonation phenomena. Th...
Chemical Reaction of CuO-Al System in Preparation of Al2O3/Cu Composite
WANG Wu-Xiao, JIE Wan-Qi, YUAN Sen
2004, 18(4): 353-358 . doi: 10.11858/gywlxb.2004.04.011
PDF (716)
Abstract:
Chemical reaction in CuO-Al pre-fabricated blocks is controlled at different temperatures. Thermal analysis curves were determined and X-ray diffraction was used to carry out phase analysis of samples after their reactions, whereby the reaction temperature for producing heat explosion and reaction p...
Analysis of Graphite-Hexagonal Boron Nitride (g-hBN) Micro-Crystal Mixture Treated under High-Pressure and High-Temperature
LUO Xiang-Jie, LUO Bo-Cheng, PENG Fang, CHEN Hao, DING Li-Ye
2004, 18(4): 359-363 . doi: 10.11858/gywlxb.2004.04.012
PDF (811)
Abstract:
For further research of the regularity of B-C-N material prepared by ball-milling method, the micro-crystal mixture of graphite-hexagonal boron nitride (g-hBN) is heat-treated under the pressure of 4.5~5.8 GPa and the temperature of 800 ℃~1 300 ℃. XRD, XPS and FT-IR analysis of the heattreated prod...
Simulation of Magnetohydrodynamics for Plasma Jetting on Wire Pinch
WANG Gang-Hua, HU Xi-Jing, SUN Cheng-Wei
2004, 18(4): 364-367 . doi: 10.11858/gywlxb.2004.04.013
PDF (905)
Abstract:
We have worked out one dimensional double region MHD programs for Z-pinch simulation. One of our calculated results of tungsten load has been discussed in the article. The dynamic phenomenon of double wire pinch is presented. The current distribution between the two liners after collision was given....
Raman Spectroscopic Studies on Methanol as Pressure Gauge
QIAO Er-Wei, ZHENG Hai-Fei, SUN Qiang
2004, 18(4): 368-373 . doi: 10.11858/gywlxb.2004.04.014
PDF (898)
Abstract:
This paper mainly studies Raman spectroscopy of CH stretching vibrational mode of methanol at 2 835 cm-1 from 169.2 up to 713.8 MPa under the temperature of 301 K using cubic zirconium oxide Anvil Cell. The result shows that methanol is stable at the experimental pressure, and the Raman shift of met...
Research on Raman Spectra of Water as a Pressure Gauge at High Pressure and Room Temperature
LI Min, ZHENG Hai-Fei
2004, 18(4): 374-378 . doi: 10.11858/gywlxb.2004.04.015
PDF (769)
Abstract:
This paper has discussed the reliability of the Raman spectra of water as a pressure gauge for the hydrothermal diamond anvil cell (HDAC) at pressures of 39~1 150 MPa and a temperature of 26 ℃. The results show a linear relation between pressure and the frequency of the fitted peak: p (MPa)=32.9(p)3...
Effect of High Pressure Nitrogen Gas Treatments of Mini-Tomato Seeds on Its Growth Characteristics
WU Xue-Hua, CHEN Li-Ying, SU Lei, LIU Xiu-Ru, HONG Shi-Ming
2004, 18(4): 379-384 . doi: 10.11858/gywlxb.2004.04.016
PDF (857)
Abstract:
In this work, mini-tomato seeds (Red Cherry) were separated random into four groups, three of them pretreated by 10, 20 and 30 MPa high pressure nitrogen gas for 4 h respectively, and the untreated one as a comparison group (abbreviated to CP). All seeds were planted under same conditions. Through o...

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