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

1988 Vol. 2, No. 4

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The High Pressure Conlidation and Magnetism of Amorphous Fe40Ni38Mo4B18 (2826MB) Powder
LIU Yong, SHEN Zhong-Yi, YIN Xiu-Jun, ZHANG Yun, ZHAO Jian-Gao
1988, 2(4): 289-295 . doi: 10.11858/gywlxb.1988.04.001
PDF (883)
Abstract:
The feasibility to prepare the glassy alloy bulk was investigated by consolidating amorphous soft-magnetic Fe40Ni38Mo4B18 powder under high pressure and at elevated temperatures. The dependence of consolidating pressure and temperature on soft-magnetic properties of the pressed samples were examined...
A Study on the High Temperature-High Pressure Stability and the X-Ray Phase Analysis for Compounds R2Fe4/3W2/3O7 with Pyrochlore Structure
WANG Yi-Feng, SU Wen-Hui, QIAN Zheng-Nan, MA Xian-Feng, YAN Xue-Wei
1988, 2(4): 296-304 . doi: 10.11858/gywlxb.1988.04.002
PDF (805)
Abstract:
The compounds R2Fe4/3W2/3O7 (R=Er, Yb, Dy) treated with high temperature-high pressure have been studied by X-ray diffraction and PSPC. It is found that under the condition of 3.7 GPa and 1 200 ℃, the compounds with hexagonal pyrochlore structure synthesized under atmospheric pressure and high tempe...
Numerical Analysis for Dynamic Damage Processes and LY-12 Aluminum Spallations
DONG Yu-Bin, ZAHNG Wan-Jia, JING Fu-Qian, HAN Jun-Wan, CHEN Da-Nian, SU Lin-Xiang, FENG Jia-Bo
1988, 2(4): 305-312 . doi: 10.11858/gywlxb.1988.04.003
PDF (548)
Abstract:
In Ref.[1], a damage-level function is proposed for analyzing the dynamic fracture processes of expanding cylindrical shell. In this paper, we extend the model to the case of planar geometry and perform numerical simulation for the dynamic damage processes under uniaxial strain case. The studied mat...
Effect of Pressure on Electrical Resistance of Ten Rare-Earth Metals
DONG Wei-Yi, LIN Ze-Shou, DENG Ke-Jun
1988, 2(4): 313-318 . doi: 10.11858/gywlxb.1988.04.004
PDF (644)
Abstract:
The pressure equipment used in this investigation was a Drickamer-type apparatus with sintered diamond compacts. The pressure calibration was established by using p vs. (L. Go) calibration diagram. The electrical resistance behavior of ten rare-earth metals (Pr, Nd, Sm, Gd, Tb, Dy, Ho, Tm, Lu and Yb...
Investigation on Superconductivity of Metallic Hydrogen
PANG Xiao-Feng
1988, 2(4): 319-326 . doi: 10.11858/gywlxb.1988.04.005
PDF (599)
Abstract:
The strong-coupling superconductivity theory has been used to study the superconductivity of metallic hydrogen in this paper. As a result, the values of the isotope effect, the thermodynamic critical magnetic field and the specific heat as well as the relationship between the functional derivatives ...
Lateral Unstability of a Jet Produced by Shaped Charge
LI Mao-Sheng
1988, 2(4): 327-334 . doi: 10.11858/gywlxb.1988.04.006
PDF (532)
Abstract:
Based on the gas dynamics with lateral gas-solid two phase flow and the stability analysis to the vibrating elastic-plastic bar, the vibration phenomenon during jet penetration could be explained in this paper.
A Diamond Anvil Cell with External Heater and Pressure Measurement by Using Ruby at High Temperature
WANG Li-Jun, HU Jing-Zhu, CHE Rong-Zheng, TANG Ru-Ming, CHEN Liang-Chen
1988, 2(4): 335-339 . doi: 10.11858/gywlxb.1988.04.007
PDF (664)
Abstract:
The techniques of diamond anvil cell used in our laboratory with external heater under high pressure and high temperature are described in this paper. The pressure and the temperature can be up to 20 GPa and 350 ℃, respectively. The high pressure phase of LiIO3, phase has been determined in situ by ...
An Improvement on Resistance Measuring Technique of Insulant under Shock Compression
GU Cheng-Gang, XIE Pan-Hai, WANG Jin-Gui, JING Fu-Qian
1988, 2(4): 340-345 . doi: 10.11858/gywlxb.1988.04.008
PDF (639)
Abstract:
An improvement technique, in comparison with that of the Mitchell, et al, on measuring the resistance of insulant under shock compression is proposed in this paper. The main point of the improvement is adding a circuit branch with an etalon resistance connected in series in it, for monitoring the sh...
Flash X-Ray Radiographic Image Restoration by Wiener Filter Method
LIU Rui-Gen, WU Shi-Fa
1988, 2(4): 346-353 . doi: 10.11858/gywlxb.1988.04.009
PDF (472)
Abstract:
Some blurred images taken by a flash X-ray system have been restored successfully. A radiography model is built by the approximation of LSI system. United PSF is presented to describe the blur effect of the system and measured by pinhole or step sample experiment successfully. Before calculation, so...
The Pressure Dependence of Ionic Conductivity of Amorphous Lithium Ionic Conductor
SU Fang, XU Wei
1988, 2(4): 354-359 . doi: 10.11858/gywlxb.1988.04.010
PDF (436)
Abstract:
The ionic conductivity and the activation volume of amorphous lithium ionic conductors B2O3-0.7Li2O-0.7LiCl-xAl2O3 (x=0.05 and 0.15) under pressure from the atmosphere to 0.80 GPa were investigated for the first time. It is found that their activation volumes have changed from negative to positive u...
A High Sensitive Method of Differential Thermal Analysis DTA under High Pressure
ZHANG Yun, YIN Xiu-Jun, SHEN Zhong-Yi, LIU Yong, ZHOU Wei-Ya
1988, 2(4): 360-364 . doi: 10.11858/gywlxb.1988.04.011
PDF (592)
Abstract:
We set up a sensitive high pressure DTA measuring method on a piston-cylinder apparatus with 20 mm inner diameter. By repeated experiments and improvements, this method is proved to be enough sensitive and efficient. The main point of this method can be stated as follows: the sample capsule is made ...

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