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

1995 Vol. 9, No. 4

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Thermal Radiation Field of Two Half-Space in Contact with Different Temperatures
ZHANG Guan-Ren
1995, 9(4): 241-246 . doi: 10.11858/gywlxb.1995.04.001
PDF (662)
Abstract:
By using the fluctuation dissipation theorem in electro-magnetic circuits, the thermal radiation energy density at any point of two half-space in contact with different temperatures derived. By approximate expansion of the derived equations, the temperature expressions at any point are obtained, whi...
Constant Magnetic Permeability and Its Both Pressure and Frequency Characteristic in Nanometer－Scale Ultramicron of Pormalloy
SU Fang, XIE Bin, CHEN Yun-Hong
1995, 9(4): 247-256 . doi: 10.11858/gywlxb.1995.04.002
PDF (865)
Abstract:
By means of vacuum evaporation and condensation technique, nanometer-scale ultramicrons of Pormalloy (Fe-50wt%Ni, Fe-84wt%Ni) were prepared. It is found out with the method of TEM and X-ray diffraction that the composition of the ultramicron coincides with that of its mother alloy, and the average g...
A New Approximant of the Decagonal Quasicrystal and Ultrafine Particles Intercepted and Captured under High Static Pressure
YU Ri-Cheng, XU Da-Peng, SU Wen-Hui
1995, 9(4): 257-263 . doi: 10.11858/gywlxb.1995.04.003
PDF (715)
Abstract:
In this paper, we reported a new approximant of Al70Co15Ni10Tb5 decagonal quasi-crystal obtained by quenching from melting state (1 700 ℃) under high static pressure (7.0 GPa) for the first time. The approximant is a B-type orthorhombic crystalline phase and its lattice parameters are a=2.28 nm, b=1...
Review of the Apparent Spectral Radiance from the Metal/Window Interface in the Measurement of Shock Temperature of Metals
TANG Wen-Hui, ZHANG Ruo-Qi, HU Jin-Biao, JING Fu-Qian
1995, 9(4): 264-269 . doi: 10.11858/gywlxb.1995.04.004
PDF (619)
Abstract:
It was shown that the temperature at the shocked ideal metal/window interface is a constant of time independent, so the apparent spectral radiance from the interface was alto regarded as time independent. This study indicates that the coefficient for light absorption of a metal decreases and the opt...
Many-Body Contributions for the Compressibility of Helium Atomic Cluster He9
LIU Fu-Sheng, GOU Qing-Quan, JING Fu-Qian
1995, 9(4): 270-274 . doi: 10.11858/gywlxb.1995.04.005
PDF (827)
Abstract:
Lowdin scheme was applied to calculate the repulsive potentials and their multi-body expansions of compressed atomic cluster He9. The micro-pressure and their expansions were calculated. The results show that many-body effects are important for the compressibility of atomic cluster He9. At the same ...
Phase Transitions of Germanium during Pressure Quenching
ZHANG Fu-Xiang, WANG Wen-Kui
1995, 9(4): 275-278 . doi: 10.11858/gywlxb.1995.04.006
PDF (753)
Abstract:
The solidification parameters of germanium are directly measured under high pressure by a developed high pressure differential thermal analysis method. The differential thermal signal indicates that some phase transitions of Ge occurred during solidification under pressures of more than 3 GPa. High ...
Studies on the Fracture Behaviour for 93 Tungsten Alloy
ZHANG Wan-Jia, YANG Zhong-Zheng
1995, 9(4): 279-288 . doi: 10.11858/gywlxb.1995.04.007
PDF (949)
Abstract:
Studies on the spallation behavior for 93 tungsten alloy have been performed with a compressed gas gun and a manganin piezoresistance gauge technique. It is found that tensile strain rate, alloy elements and metallurgical technology can significantly influence the fracture strength of this material....
An Accrate Measurement Technique for Shock Hugoniot
WANG Jin-Gui
1995, 9(4): 289-295 . doi: 10.11858/gywlxb.1995.04.008
PDF (716)
Abstract:
In order to accurately measure the shock Hugoniot, we introduce the methods to reduce the relative errors in the measurements for the size of samples and the time intervals in the experiments and that to correct the errors caused by the inclined impact. The experimental results demonstrate that thes...
The Phase Transition of Fullerene Carbon under High Temperature and Pressure
ZHANG Hong-Huang, LIANG Ji, WEI Bing-Qing, GAO Zhi-Dong, ZHANG Ji-Hong, LIU Li-Fang, ZHAO Gang
1995, 9(4): 296-301 . doi: 10.11858/gywlxb.1995.04.009
PDF (738)
Abstract:
The phase transition of both C60 and Buckytube has been studied under high pressure up to 5～6 GPa and high temperature at 1 450 ℃ by cube equipment. The experimental results of SEM, X-ray and Uv/Vis show that most of the fullerene sample can transform to diamond with good crystal morphology, part tr...
Measurement of Convective Diffusion Coefficients of CO2-Normal Octane and Normal Tetradecane System
WANG Li-Sheng, DONG Qing-Tian, LANG Zhao-Xin
1995, 9(4): 302-309 . doi: 10.11858/gywlxb.1995.04.010
PDF (789)
Abstract:
The method for measuring convective diffusion coefficients of driving gases in reservoir fluid by slim tube displacement method has been established in this work. The convective diffusion coefficients of CO2-normal octane and normal tetradecane systems have been measured and the effect of driving ra...

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