高压物理学报

Hugoniot Temperature Measurements for Metals by Using Optical Radiation MethodModel Review and Discussion

DAI Cheng-Da, TAN Hua

2006, 20(2): 113-121 . doi: 10.11858/gywlxb.2006.02.001

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Abstract:
Shock temperature and melting temperature measurements are of importance to construct complete equation-of-states of materials. In this article, we overviewed the one-dimensional heat conduction model at ideal interface and model at non-ideal interface in Hugoniot temperature measurements of metals,...

Explosive Synthesis of Nanometer Titanium Dioxide and Parameter Control

LI Xiao-Jie, CHEN Tao, XU Zhao-Long, LI Rui-Yong, QU Yan-Dong, WANG Zhan-Lei

2006, 20(2): 122-126 . doi: 10.11858/gywlxb.2006.02.002

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Abstract:
Some TiO2 nanoparticle samples with size range from 10 nm to 60 nm were prepared by explosive synthesis method. The influence of the preparation parameters on the size and the crystalline phase of the TiO2 crystallite were studied by means of X-ray diffraction (XRD) technique, SEM, TEM and BET. With...

Percolation Description for the Early Stage of Void Coalescence during Dynamic Tensile Fracture in Ductile Materials

WANG Yong-Gang, HE Hong-Liang, WANG Li-Li, JING Fu-Qian

2006, 20(2): 127-132 . doi: 10.11858/gywlxb.2006.02.003

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Abstract:
Based on the frame of percolation theory, a new stress release function named as Percolation Release (PR) function has been proposed to describe the course of stress release during the early stage of void coalescence until the final or catastrophic fracture occurring. A clearly physical meaning is g...

Numerical Analysis of Marginal Detonation Dynamics in a Rectangular Tube

WANG Chang-Jian, XU Sheng-Li

2006, 20(2): 133-138 . doi: 10.11858/gywlxb.2006.02.004

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Abstract:
Marginal detonation dynamics in a rectangular tube was numerically analyzed in this paper. The detailed chemical reaction model was employed to describe the heat release of detonation chemical reactions. The 2nd additive semi-implicit Runge-Kutta method and 5th order Weighted Essentially Non-Oscilla...

Studies of the Hugoniot Curve for Fe/FeO/FeS Mixture

HUANG Hai-Jun, JING Fu-Qian, CAI Ling-Cang, BI Yan, MENG Chuan-Min

2006, 20(2): 139-144 . doi: 10.11858/gywlxb.2006.02.005

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Abstract:
Hugoniot compression curve for the mixture of Fe/FeO/FeS (58.96%/35.83%/5.21%, mass fraction) has been measured from 50 to 210 GPa, using two-stage light-gas gun and electric pin technique. The measured Hugoniot parameters are: C0＝(3.970.07) km/s, ＝1.580.03 and initial density 0＝(6.690.06) g/cm3. Ba...

Sound Velocity Measurements for Shock-Compressed LY12 Aluminum Alloy by Using VISAR Technique

YU Yu-Ying, TAN Hua, HU Jian-Bo, DAI Cheng-Da, MA Yun, CHEN Da-Nian

2006, 20(2): 145-152 . doi: 10.11858/gywlxb.2006.02.006

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Abstract:
The experimental method to measure the high-pressure sound velocity of shock-compressed LY12 aluminum alloy by VISAR technique is described. Symmetrical plate impact experiments were conducted with the two-stage light-gas gun and at peak stresses about 20, 32, 55 and 71 GPa, respectively. In each sh...

Calculation of Shock Temperature by Considering Electronic Contribution

RAN Xian-Wen, TANG Wen-Hui, TAN Hua, DAI Cheng-Da

2006, 20(2): 153-156 . doi: 10.11858/gywlxb.2006.02.007

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Abstract:
Basing on the former shock temperature calculation methods, a new method was proposed, which considered the electronic contribution and successfully avoided the difficulties of calculating 0 K EOS of materials. By applying it to aluminum and copper, the results were well consistent with experimental...

Investigations on Combustion and Explosion Process of Suspended Aluminum Particles in a Large Combustion Tube

CHEN Zhi-Hua, FAN Bao-Chun, LI Hong-Zhi

2006, 20(2): 157-162 . doi: 10.11858/gywlxb.2006.02.008

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Abstract:
The combustion and acceleration mechanism of aluminum particles has always been the focus of some related research institutes, due to its potential application value. In the present paper, to further the investigation of combustion and propagation characteristics of aluminum particles in a limited s...

Modelling Synthesis in Laboratory of Coesite in the Earth's Crust and Its Formation Mechanism

LIU Shu-E, XU Da-Peng, LIU Xiao-Mei, SU Wen-Hui, XUE Yan-Feng, SUN Jing-Shu

2006, 20(2): 163-171 . doi: 10.11858/gywlxb.2006.02.009

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Abstract:
The factors of collision and shear stress in the coesite formation has not been considered in the condition of high static pressure that was the base of the hypothesis of subduction-return of slab in the Earth. After considered these factors, a laboratory method of combining the high-energy mechanic...

Numerical Simulation of Shock Wave Structure in Single Crystal Copper

DENG Xiao-Liang, ZHU Wen-Jun, LUO Jin, HE Hong-Liang, WU Deng-Xue, JING Fu-Qian

2006, 20(2): 172-178 . doi: 10.11858/gywlxb.2006.02.010

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Abstract:
The structure of shock wave in single crystal copper has been studied by means of molecular dynamics (MD) method with a realistic embedded atom potential at initial condition of zero temperature. The simulation results indicate that the after-shock state will evolve to thermodynamic equilibrium stat...

Study on the Synthesized Black Low-Magnetism Diamond

PENG Fang, ZHANG Mei-Guang, CHEN Chao, WANG Jiang-Hua, SUN Gang, LUO Xiang-Jie

2006, 20(2): 179-182 . doi: 10.11858/gywlxb.2006.02.011

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Abstract:
Based on the testing of the magnetic susceptibility of the raw materials and the final products: graphite, Ni70Mn25Co5, general diamond, black diamond and melting NiMnCoC in the synthesis of diamond and the analyzing of the fracture surface of black diamond and general diamond by the Scanning Electr...

Effect of High Pressure Treating Catharanthus Roseus Seeds on Enhancing Content of Vinblastine in the Plant

CHEN Li-Ying, WU Xue-Hua, LIU Xiu-Ru, SU Lei, HONG Shi-Ming, LIANG Heng-Xing, GUO Li

2006, 20(2): 183-188 . doi: 10.11858/gywlxb.2006.02.012

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Abstract:
Three groups of short annual Catharanthus roseus seeds were treated in high pressure nitrogen gas for 4 h at room temperature; the pressure was 10, 20 and 30 MPa, respectively. Other untreated seeds were regarded as a control group (abbreviated to CP). All seeds were planted under same condition. Th...

The Effect of Engraving Force of Projectile on Interior Ballistic Performance of DAVIS Gun

DUAN Ji-Yuan, WANG Yan-Ping, LIU Cang-Li, YU Chuan

2006, 20(2): 189-193 . doi: 10.11858/gywlxb.2006.02.013

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Abstract:
The engraving force of projectile of a DAVIS gun through the way of project and interior ballistics during engraving has been calculated, and its effect on interior ballistic performance has been analyzed. The experiential value for theoretic model was determined, which simplified the calculation, b...

Single-Domain Nanosphere Observation and Ferromagnetic/Antiferromagnetic Coupling of Ni/NiO

LIU Xian-Song, ZHANG Cheng-Wen, ZHOU Sheng-Qiang, YIN Ping, Udi Meridor, Aviad Frydman, Aharon Gedanken

2006, 20(2): 194-201 . doi: 10.11858/gywlxb.2006.02.014

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Abstract:
Magnetic force microscopy (MFM) measurements were performed on monodispersed single-domain nickel nanospheres fabricated by the microwave-assisted (MW) polyol method. As found by MFM, a relevant characteristic of these spheres with a size distribution in the 100~180 nm range is the magnetic stripe d...

Structural Design and Experimental Study on Forward Shaped Charge and Explosion-Proof Body for Tandem Warhead

DUAN Jian, YANG Qian-Long, ZHOU Gang, CHU Zhe, TIAN Ya-Jun, ZHANG Ying

2006, 20(2): 202-206 . doi: 10.11858/gywlxb.2006.02.015

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Abstract:
The forward shaped charge's penetrative technology and the two-stage explosion-proof technology are two key technologies in the studies of tandem warhead. Based on theoretic analysis and experimental study, we have analyzed the forward charge's structure and its blast effect on the follow-through pe...

Study of the Uncertainty of the Ejected Mass Measured by ASAY Foil Method

MA Yun, WANG Xiao-Song, LI Xin-Zhu, HU Shao-Lou, LI Jia-Bo, CHEN Hong, WENG Ji-Dong

2006, 20(2): 207-210 . doi: 10.11858/gywlxb.2006.02.016

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Abstract:
The thin foil Doppler laser interferometry named ASAY foil method that can measure the mass of the ejection was described. The measurement accuracy of ASAY foil method had been tested on a predetermined ejection called Simulated Standard Ejection that a well defined thin layer of aluminium powder wa...

Preparation and Structure Characters of Nano-Powder of Ti1-xCexO2 System

LI Jian, SONG Gong-Bao, WANG Mei-Li, ZHANG Bao-Shu

2006, 20(2): 211-216 . doi: 10.11858/gywlxb.2006.02.017

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Abstract:
The series samples of Ti1-xCexO2 (x=0, 0.01, 0.02, 0.04, 0.06, 0.07 and 0.09) were prepared by Sol-Gel process. The particle sizes, morphologies, solid solution range and phase relations of Ti1-xCexO2 samples were studied by XRD, TEM and HR-TEM. Meanwhile, the Rietveld refinement method was employed...

Charge Release Characterization of PZT95/5 Ferroelectric Ceramics under Tilted Shock Wave Compression

ZHANG Fu-Ping, ZHANG Yi, DU Jin-Mei, WANG Hai-Yan, HE Hong-Liang

2006, 20(2): 217-219 . doi: 10.11858/gywlxb.2006.02.018

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Abstract:
The current waveform of Ferroelectric ceramics PZT95/5 depoling under tilted shock wave compression has been studied. Analytic model was established to analyze the effects of incident angle on the rising time, duration and peak amplitude of the depoling current. Experiments were conducted as well to...

Study on the Synthesis of New Energetic Fullerene Derivative

JIN Bo, PENG Ru-Fang, SHU Yuan-Jie, ZHONG Fa-Chun, CHU Shi-Jin

2006, 20(2): 220-224 . doi: 10.11858/gywlxb.2006.02.019

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Abstract:
A new fullerene derivative 1 which contains energy-producing groups was prepared by the Prato reaction, and the reaction conditions affecting the yield of product 1 were investigated. The optimized reaction conditions which afforded 65.8% (based on consumed C60) of product 1 are: molar ratio of C60,...

2006 Vol. 20, No. 2

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