高压物理学报

Synchrotron Radiation Diffraction of Gallium Oxide under High Pressure

CUI Qi-Liang, TU Bao-Zhao, PAN Yue-Wu, WANG Cheng-Xin, GAO Chun-Xiao, ZHANG Jian, LIU Jing, ZOU Guang-Tian

2002, 16(2): 81-84 . doi: 10.11858/gywlxb.2002.02.001

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Abstract:
The in-situ synchrotron radiation diffraction of gallium oxide under high pressure has been studied in the range of 0～42.5 GPa with diamond anvil cell (DAC), using methanol-ethanol-water (16∶3∶1) mixture as transmission medium. We have found that under room temperature, the monoclinic gallium oxide ...

High-Pressure and High-Temperature Synthesis of the Electron-Doped Layered Magnates La2-2xCa1+2xMn2O7

ZHU Jia-Lin, YU Ri-Cheng, LI Feng-Ying, JIN Chang-Qing

2002, 16(2): 85-93 . doi: 10.11858/gywlxb.2002.02.002

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Abstract:
The electron-doped layered magnates with nominal composition La2-2xCa1+2xMn2O7 (x=1.0～0.8) were prepared using a standard solid-state reaction method at a temperature of 1 260 ℃ and a pressure of 5 GPa. The structures of the compounds were investigated using powder X-ray diffraction and Rietveld ana...

Penetration and Perforation of Thick Metallic Targets under Impact by Missiles

WEN He-Ming

2002, 16(2): 94-104 . doi: 10.11858/gywlxb.2002.02.003

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Abstract:
Simple analytical equations are given in this paper to predict the penetration and perforation of thick metallic targets under normal impact by missiles with different nose shapes over a wide range of impact velocities. In the formulation, it is assumed that the deformations are localized and that t...

Analysis of Equivalence for Structural Response Induced by Pulsed X-Ray with Other Analogue Sources

PENG Chang-Xian

2002, 16(2): 105-110 . doi: 10.11858/gywlxb.2002.02.004

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Abstract:
The equivalence of structural response induced by pulsed X-ray with analogues of electron beam and explosion are analyzed. The measured results of structural response in aluminum alloy cylindrical shells subjected to pulsed X-ray and MDF explosion are used in quantitative analyses of equivalence. Th...

Detonation Reaction-Zone Structure of JB-9014

ZHAO Tong-Hu, ZHANG Xin-Yan, LI Bin, WANG Gui-Chao

2002, 16(2): 111-118 . doi: 10.11858/gywlxb.2002.02.005

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Abstract:
The structure of reaction-zone of JB-9014 explosive was investigated using photoelectric technique. For one dimensional steady detonation wave of JB-9014 (1.894 g/cm3), the Neumann spike pressure is 36.5 GPa, the width of reaction-zone is 1.75 mm, and the period of reaction is 0.31 s. It was found t...

p-V Characteristics of Sintered Porous Mo under Hydrostatic Pressure

SUN Yue, LIU Fu-Sheng, GAO Zhan-Peng, ZHANG Qing-Fu

2002, 16(2): 119-124 . doi: 10.11858/gywlxb.2002.02.006

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Abstract:
Loading-unloading experiments on mid-density sintered porous Mo specimen were conducted under hydrostatic pressure. Under the circumstance, the p-V characteristics of foamed material with different diameters and initial density were first studied. Certain evidences show that strain amplitude in samp...

Preparation of W-Mo Composites and Their Characteristic Wave Impedance

SHEN Qiang, DOU Jin-Feng, ZHANG Lian-Meng, HUA Jing-Song, TAN Hua

2002, 16(2): 125-130 . doi: 10.11858/gywlxb.2002.02.007

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Abstract:
Dense W-Mo composites with different mass fractions of W and Mo were prepared at same temperature (1 473 K) and pressure (30 MPa) by using spark plasma sintering technique. The transverse and longitudinal wave velocities of the samples were accurately measured using ultrasonic pulse echo overlap met...

Shock Wave Crystallization of Amorphous Alloys FeSiB, FeMoSiB and FeCuNbSiB

ZHAO He-Yun, KAN Jia-De, WANG Hai, LIU Zuo-Quan

2002, 16(2): 131-136 . doi: 10.11858/gywlxb.2002.02.008

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Abstract:
Shock wave and annealing crystallization of amorphous alloys FeSiB, FeMoSiB and FeCuNbSiB were investigated by isothermal and non-isothermal DSC technique. It is found that shock wave crystallization is very perfect (fraction crystallized is very close to 100%) though the period of crystallization i...

Electrical Properties and Phase Transition of Sr2FeMoO6 under High Pressure

ZHAO Pan, BAO Zhong-Xing, LIU Cui-Xia, LI Feng-Ying, LIU Zhen-Xing, JIN Ming-Zhi, YU Ri-Cheng, JIN Chang-Qing

2002, 16(2): 137-139 . doi: 10.11858/gywlxb.2002.02.009

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Abstract:
The resistance-pressure and capacitance-pressure relationships for double perovskite material of Sr2FeMoO6 at room temperature and up to 20 GPa were studied using a diamond anvil cell. The experimental results show that Sr2FeMoO6 (a kind of half-metal material) undergoes metallic transition at about...

Thermodynamic Study on Passivation Reaction of Uranium with Supercritical Fluid CO2

XUE Wei-Dong, ZHU Zheng-He, CHEN Chang-An, ZOU Le-Xi, SUN Ying, ZHANG Guang-Feng, WANG Xiao-Lin

2002, 16(2): 140-146 . doi: 10.11858/gywlxb.2002.02.010

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Abstract:
The passivation process of supercritical CO2 fluids on the surface of metallic uranium was calculated. The results show that the change of Gibbs free enthalpies of the substances in passivation layer decreases with elevated temperature, and that the increased pressure facilitates the formation of pa...

Particle Simulation on Plasma Bubble and Energetic Ion Generation Produced by Laser

MA Yan-Yun, CHANG Wen-Wei, YIN Yan, CAO Li-Hua, YUE Zong-Wu

2002, 16(2): 147-151 . doi: 10.11858/gywlxb.2002.02.011

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Abstract:
The interaction between high power S-polarized laser and overdense plasma was investigated numerically using a 2.5 D particle code PLASIM. Both electron caviton and plasma ripple appear and the latter is just like bubbles. Ions are accelerated in the front of the bubbles, whose relativistic kinetic ...

Shock Wave Physics: The Coming Challenges and Exciting Opportunities in the New Century－Introduction of the 12th International Conference of Shock Compression of Condensed Matter (SCCM-2001)

GONG Zi-Zheng

2002, 16(2): 152-160 . doi: 10.11858/gywlxb.2002.02.012

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Abstract:
The 12th Biennial International Conference of the APS Topical Group on Shock Compression of Condensed Matter (SCCM-2001) was introduced. Papers presented in SCCM-2001 were surveyed and the recent progresses on shock compression of condensed matter were retrospected. The basic paradigms and the great...

2002 Vol. 16, No. 2

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