高压物理学报

Synthesis of SiCp/Al Nanocomposite under Ultra-High Pressure

LIU Hao-Zhe, HE Hong-Liang, WANG Lu-Hong, WANG Ai-Min, JIN Chang-Qing

1999, 13(1): 1-6 . doi: 10.11858/gywlxb.1999.01.001

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Abstract:
SiC nanoparticle reinforced Al-matrix composite has been synthesized under the ultra-high pressure. X-ray diffraction (XRD), high resolution electron microscopy (HREM), positron annihilation and Vickers micro-hardness measurements have been used to evaluate the chemical reaction and the bonding beha...

Experimental Investigation on the Errors of the in Situ Magnetic Measurements in Hydrostatic High Pressure Vessel (3)－Comprehensive Consideration of Two Influences

SU Fang, SU Xiao

1999, 13(1): 7-14 . doi: 10.11858/gywlxb.1999.01.002

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Abstract:
In order to investigate the errors of the primary coil with multiple electric solenoid, we selected two samples using different slice-number (n=1, 3) of amorphous alloy Fe46.3Co0.03Ni46.5Si3.75V0.92B2.5 ribbon, inserted into the 13 layers electric solenoid and measured the magnetization, magnetic pe...

Experimental Studies of Blowoff Impulse Induced by Electron Beam with Different Materials and Different Energy Fluxes

PENG Chang-Xian, TAN Hong-Mei, HU Ze-Gen, LIN Peng, LIU Jin

1999, 13(1): 15-21 . doi: 10.11858/gywlxb.1999.01.003

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Abstract:
In this paper, the experimental studies of variation of blowoff impulse with different materials and different energy fluxes are described. The experiments are conducted on FLASH-Ⅱ electron beam equipment with the probe principle of directly measuring the specific series of time intervals and miniat...

Changes of Solubility and Rheological Property of the Isolated Soybean Protein after High Pressure Treatment and Its Mechanism

LI Bian-Sheng, ZENG Qing-Xiao, PENG Zhi-Ying, CHEN Bo-Nuan, LIANG Di-Hua

1999, 13(1): 22-29 . doi: 10.11858/gywlxb.1999.01.004

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Abstract:
The changes as well as its mechanism of solubility and rheological property of the isolated soybean protein (ISP) in water solution after high pressure treatment were studied. The solubility of ISP was improved after high pressure treatment, which had the highest increment after pressurization at 40...

Phase Transitions and Electronic Properties of La1.65Sr0.35CaCu2O4+Cly under High Pressure

BAO Zhong-Xing, XU Li-Wen, CHE Guang-Can, LIU Cui-Xia, CHEN Hong, WU Fei, ZHAO Zhong-Xian

1999, 13(1): 30-33 . doi: 10.11858/gywlxb.1999.01.005

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Abstract:
The pressure-induced phase transitions, including some irreversible transitions from crystallite to noncrystallite, of copper oxy-chloride superconductor La1.65Sr0.35CaCu2O4+Cly were studied by both the measurements of electronic resistance (R) dependence on pressure (p) and X-ray diffraction techni...

Pressure-Induced Structural Phase Transition of Ba3Bi3Ti4NbO18

HAN Jie, ZOU Guang-Tian, CUI Tian

1999, 13(1): 34-36 . doi: 10.11858/gywlxb.1999.01.006

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Abstract:
The pressure-induced structural phase transition of the layered ferroelectrics Ba3Bi3Ti4NbO18 and its variation of Raman spectra under 8.87 GPa have been studied. The internal modes of Ba3Bi3Ti4NbO18 have been assigned according to the internal mode approach. It was found that Ba3Bi3Ti4NbO18 experie...

Volume Adding Model and Thermodynamic Self-Consistency for Equation of State of Mixtures

WANG Zheng-Yan, LI Mao-Sheng, CHEN Dong-Quan, XU Xi-Shen

1999, 13(1): 37-41 . doi: 10.11858/gywlxb.1999.01.007

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Abstract:
In this article we present a volume-adding model to calculate EOS of mixture numerically using tabulated EOS data for its constituents with volume-pressure iterative method. Meanwhile, it is proved that if each of the constituent EOS satisfies the thermodynamic self-consistency, their mixture EOS wi...

The Determination of Lagrangian Sound Velocities for 93W Alloy under Shock Loading and Its Application

ZHANG Jiang-Yue, TAN Hua, YU Ji-Lin

1999, 13(1): 42-49 . doi: 10.11858/gywlxb.1999.01.008

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Abstract:
It is believed that material always has a finite strength before reaching its shock melting point. In other words, shear strength will not equal to zero at the initial shock compression states before shock melting occurs. In the classical shock pressure experimental measurements, however, we often t...

Research on the High Transformation Ratio of Graphite to Diamond by the Static Pressure Method

YI Jian-Hong

1999, 13(1): 50-54 . doi: 10.11858/gywlxb.1999.01.009

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Abstract:
Catalystic materials play an important role in the diamond synthesis. It can reduce the pressure and temperature required to transform graphite into diamond. By using Ni-Mn-C powder catalyst, the diamond synthesis with a transformation ratio of 90% from graphite has been achieved in this paper.

Review and Look Forward to the Progress of VLW Equation of State

WU Xiong, LONG Xin-Ping, HE Bi, JIANG Xiao-Hua

1999, 13(1): 55-58 . doi: 10.11858/gywlxb.1999.01.010

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Abstract:
The background of the establishment of VLW equation of state (EOS) has been reviewed in this paper. Comments on the fact that the third item of VLW EOS has been proved theoretically after VLW EOS proposed about ten years was made. The future progress of it is forecasted.

Raman Scattering of Ultrafine Diamond Obtained from Detonation

CHEN Peng-Wan, YUN Shou-Rong, HUANG Feng-Lei, CHEN Quan, MA Feng

1999, 13(1): 59-63 . doi: 10.11858/gywlxb.1999.01.011

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Abstract:
Raman spectra of ultrafine diamond obtained from detonation are measured. The characteristic Raman bands assigned to sp3 diamond and sp2 graphite have been observed at around 1 321 cm-1 and 1 600 cm-1, respectively, in which the sp3 diamond band is asymmetric with the half-peak width of about 30 cm-...

Investigation on Impact Sensitivity of Explosive with Fractal Geometry

LIN Qi-Wen, XIA Xian-Gui, YANG Guang-Zhi, ZHANG Guan-Ren, LIAO Han-Ning

1999, 13(1): 64-70 . doi: 10.11858/gywlxb.1999.01.012

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Abstract:
The framing photographs of explosive samples under drop hammer test exhibit a fractal structure, in which the fractal dimension is related to the explosive's impact sensitivity. Based on the perimeter-area relation in fractal geometry and the linear recurrent analysis, fractal dimension calculations...

Diffuse Reflectivity of Shock-Compressed Tungsten Target to 514.5 nm Laser

LI Ze-Ren, LIU Jun, CHENG Xiao-Feng, MA Ru-Chao, YAO Jian-Quan

1999, 13(1): 71-75 . doi: 10.11858/gywlxb.1999.01.013

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Abstract:
A series of experiments of flat impact between copper flyer and tungsten target has been done on a two stage light gas gun and the diffuse reflectivity of tungsten target to 514.5 nm incident laser was measured under 85～250 GPa shock pressure. The experimental results show that shock compression deg...

Explosive Bulge Test for Metal Tube of Magnetic Flux Compression Generator (MFCG)

YAN Cheng-Li, YU Chuan, LI Liang-Zhong, TONG Yan-Jin

1999, 13(1): 76-80 . doi: 10.11858/gywlxb.1999.01.014

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Abstract:
Metal tube is the important part of MFCG. Its expansive characteristic driven by detonation product is the important basis of the MFCG design. In this paper, the detonation velocity of RDX explosive powder in copper tube was measured by electric method. We derived the detonation velocity of RDX powd...

1999 Vol. 13, No. 1

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