高压物理学报

Experimental Investigation on the Garnet Growth during the Metamorphism of Eclogite Facies

ZHOU Wen-Ge, XIE Hong-Sen, ZHAO Zhi-Dan, GUO Jie, XU Ji-An, BAI Wu-Ming

1999, 13(4): 241-246 . doi: 10.11858/gywlxb.1999.04.001

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Abstract:
The grain growth kinetics of the garnet during the transformation of trachybasalt and andesite to eclogite has been investigated at 2.0～3.0 GPa. The experimental samples were annealed at temperatures of 860 ℃, 870 ℃and 980 ℃ for 0.57 to 13 h. The grain size was determined optically. The normal grain...

Equation of State of Detonation Product (Ⅱ)－Does ZND Theory of Detonation Fail? (A)

LI Yin-Cheng

1999, 13(4): 247-254 . doi: 10.11858/gywlxb.1999.04.002

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Abstract:
As a theory, the ZND theory of detonation must be precisely proved true. American scientists had performed the test. They did not give positive conclusion due to lack of the knowledge of the equation of state of the product. A liquid equation of state that describes the interaction between the molec...

Study of Equation-of-State of Dense Helum by Molecular Dynamics Simulation

CAI Ling-Cang, CHEN Qi-Feng, JING Fu-Qian, CHEN Dong-Quan

1999, 13(4): 255-261 . doi: 10.11858/gywlxb.1999.04.003

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Abstract:
The optimized value of =12.7, which is the stiffness parameter in exponential 6 potential function used for describing the compression behavior of dense helium, is determined by means of molecular dynamics simulation and makes comparison with the experimental isotherm of solid helium. Then, we adopt...

Surface Modification of HDPE and PC under Shock Pressure

LI Peng, LI Liang-Bin, HUANG Rui, CAI Bi-Hua, FAN Wu-Yi, LIU Fu-Sheng, ZHANG Qing-Fu, SHI Shang-Chun

1999, 13(4): 262-267 . doi: 10.11858/gywlxb.1999.04.004

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Abstract:
The surface of HDPE and PC samples undergone transient shock pressure were investigated with ESCA and FT-IR, which show high oxygen/carbon ratio of 0.195∶1 and 0.266 ∶1 respectively, suggest that oxygen-containing groups are rich on the surface. The high pressure and temperature induced by shock are...

Experimental Study of the Effect of Initial Density on Width of Detonation Reaction Zone of JO-9159

ZHANG Zhen-Yu, WANG Zhi-Bing, LU Fang-Yun

1999, 13(4): 268-271 . doi: 10.11858/gywlxb.1999.04.005

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Abstract:
The width of detonation reaction zone of JO-9159 with two different initial densities is measured by embedded electric-magnetic velocity (EMV) gauges. The experimental results show that, for heterogeneous explosives with narrow detonation reaction zone such as JO-9159, the rate of reaction is relate...

An One-Dimensional Phase Transition Constitutive Model

WANG Wen-Qiang, TANG Zhi-Ping

1999, 13(4): 272-277 . doi: 10.11858/gywlxb.1999.04.006

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Abstract:
Defects are always existing in real materials, which cause stress concentration. When phase transition takes place, new phase nuclei form first at the positions of defects and then grow via phase boundary propagation. There is a certain relationship between the propagation velocity of phase boundary...

The Influence of the Pressure, Temperature and Time on the Properties of Sintered Diamond Compacts

SUN Zhen-Wu

1999, 13(4): 278-282 . doi: 10.11858/gywlxb.1999.04.007

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Abstract:
The effects of the pressure, temperature and time on the properties of sintered diamond compacts are investigated in infiltrating way in this work; sintered diamond compacts of metal additive with the wear resistance ratio of 285103 and without abnormal diamond grain growth are obtained at 1 400 ℃, ...

A Method of Locating the Light Spot of Incidence Synchrotron Radiation in EDXRD Experiment under high Pressure

ZHAO Jing, LIU Jing, YANG Yang, GAO Zhen-Hua, CHE Rong-Zheng

1999, 13(4): 283-289 . doi: 10.11858/gywlxb.1999.04.008

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Abstract:
It is a key part to locate the light spot of incidence from 3WB1 beam of line at the sample chamber in a gasket for EDXRD experiments under high pressure using synchrotron radiation. The high pressure station has introduced the system of four-blade-slits which can scan at x-y directions and realize ...

Equation of State for Gas N2 at Low Temperature and High Density

YANG Chuan-Lu, WANG Rong, WANG Fan-Hou, ZHU Zheng-He, WANG Ming-Da, ZHENG Yong-Ming, TANG Yong-Jian, ZHENG Zhi-Jian, ZHAO Yong-Kuan

1999, 13(4): 290-294 . doi: 10.11858/gywlxb.1999.04.009

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Abstract:
The present paper has calculated the p-V-T of gas N2 at temperature 150 K and density not more than 2.548c using Beattie-Bridgeman (BB) equation of state and its modification Benedict-Webb-Rubin (BWR). It is surprisingly found that the BWR equation of state is accurate at such low temperature and ra...

Study on Shock Compression of Liquids Nitrogen and Carbon Monoxide

SHI Shang-Chun, DONG Shi, HUANG Yue, LIU Fu-Sheng, SUN Yue

1999, 13(4): 295-300 . doi: 10.11858/gywlxb.1999.04.010

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Abstract:
Dynamic equation-of-state for liquids N2 and CO were measured in the shock pressure range of 10～57 GPa, using a two-stage light-gas gun. The liquids were shocked from initial states near their saturation curves at 77.6 K that their densities are about 0.808 g/cm3 and 0.807 g/cm3 for N2 and CO, respe...

Effect of Buoyant Force and Its Influence on the Process of Growing Diamond by the Excess Pressure Seed Method

LUO Bo-Cheng, LUO Xiang-Jie, ZHANG Xin-Yuan, LI Zhu, DING Li-Ye

1999, 13(4): 301-306 . doi: 10.11858/gywlxb.1999.04.011

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Abstract:
In Excess Pressure Seed Method of synthesis diamond, we have observed the phenomenon that crystal seed grew floating up in the melting metal solvent under high-temperature and high-pressure by appropriate designing the composite cavity assembly, designing the way and the location of crystal seed pla...

1999 Vol. 13, No. 4

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