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

1993 Vol. 7, No. 4

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Evolution Dynamic Equations of Dislocation Density
Dong Lian-Ke
1993, 7(4): 241-246 . doi: 10.11858/gywlxb.1993.04.001
PDF (887)
Abstract:
We regard the proliferation, the annihilating and the mutual reactions of the dislocations as chemical reactions, dislocations under action of heat activation will have properties of diffusion. Therefore a dislocation system is a reaction-diffusion system. Two equations of evolution dynamics for dis...
Theoretical Studies of the Thermal Relaxation at the Materials Interface under Shock Compression
TANG Wen-Hui, ZHANG Ruo-Qi, JING Fu-Qian, HU Jin-Biao
1993, 7(4): 247-253 . doi: 10.11858/gywlxb.1993.04.002
PDF (629)
Abstract:
The thermal relaxation processes at metal/window interfaces under shock compression are studied. Starting from the contact resistance model, a functional relation between the thermal relaxation time and the interface thermal reistance as well as the thermal transport coefficients of materials is obt...
The Microstructure of Shock Wave-Processed 45 Steel
JIN Xiao-Gang, WANG Hong
1993, 7(4): 254-259 . doi: 10.11858/gywlxb.1993.04.003
PDF (583)
Abstract:
The projectile was driven to 2.34 km/s by using 20 mm diameter two-stage light gas gun and impacted with a target to deliver a shock wave into 45 steel sample material. The micro-hardness and micro-structure of the shock wave processed 45 steel were analyzed. The observed results indicate that twins...
Theoretical Calculation of the Resistivity of Teflon under Shock Loading
ZHANG Guan-Ren
1993, 7(4): 260-264 . doi: 10.11858/gywlxb.1993.04.004
PDF (917)
Abstract:
The resistivity of Teflon under shock loading is calculated theoretically by means of the Mott and Jones' formula with the addition of its equation of state. The results are compared with the published experimental data. Although they may be in good accord, some mechanisms about the decrease of poly...
Explosive Welding of Amorphous Alloy Ribbons
LI Xiao-Jie, ZHANG Kai, YANG Wen-Bin, XI Jin-Yi, SUN Ming
1993, 7(4): 265-271 . doi: 10.11858/gywlxb.1993.04.005
PDF (827)
Abstract:
Amorphous alloys or metallic glass belongs to a novel class of rapidly solidified alloys, well known for their amorphous structures and excellent properties. Usually, it can only take a very limited number of shapes; thin ribbon, wires or powders. This limitation becomes a major barrier against the ...
The Interface Instability of the Flyer Driven by Explosion
WANG Wen-Qiang
1993, 7(4): 272-278 . doi: 10.11858/gywlxb.1993.04.006
PDF (668)
Abstract:
The interface instability of a flyer driven by one dimensional or by sliding explosive detonation was studied. The computational results for one dimensional driving are in accord with the experimental results. For sliding explosion, however, there exist no experimental results to compare with, only ...
A Study on the Catalytic Mechanism of Fe-Based Alloy Diamond Growth
HAO Zhao-Yin, LIU Mi-Lan, CHEN Yu-Fei
1993, 7(4): 279-285 . doi: 10.11858/gywlxb.1993.04.007
PDF (782)
Abstract:
The change of the 3d shell electrons of Fe-based alloys at high pressure and temperature has been measured by using electron energy spectra and Mossbauer spectra, which reveals the bond reaction between the unpaired electrons in the 3d shell of Fe atoms and the 2Pz electrons of carbon atoms in synth...
Experimental Studies of the Dynamic Strain Produced in the Circular Ring Targets Bombarded by Electron Beam
PENG Chang-Xian, CHENG Gui-Gan, XU Jian-Bo, YU Bao-Ming
1993, 7(4): 286-292 . doi: 10.11858/gywlxb.1993.04.008
PDF (588)
Abstract:
The dynamic strain is an important mechanic parameter of the structural response produced in the target structure bombarded by electron beam. In this paper, the experimental studies of the dynamic strain produced in the circular ring targets bombarded by electron beam on FLASH-Ⅱ equipment during the...
Nucleation and Crystal Growth of Synthetic Diopside-Jadeite Jewelry
ZHAO Ting-He, YAN Xue-Wei, CUI Shuo-Jing, ZHU Yi-Bing
1993, 7(4): 293-300 . doi: 10.11858/gywlxb.1993.04.009
PDF (666)
Abstract:
The effects of the crystalline temperature on the hardness and crystalline degree of synthetic diopside-jadeite were studied in this paper. Diopside-jadeite jewelry synthesized from glass with stoichiometry of 0.4CaMgSi2O6-0.6NaAlSi2O6 was obtained under 4.0 GPa, at the different temperatures from 9...
The control of Graphite Component in Diamond Thin Films Growth by the Hot Filament CVD Method
YANG Guo-Wei, MAO You-De, Zhang S G
1993, 7(4): 301-304 . doi: 10.11858/gywlxb.1993.04.010
PDF (801)
Abstract:
The effect of the deposition conditions on the graphite or amorphous carbon component in the formation of diamond thin films by HFCVD method was studied. We found that high CH3COCH3 concentration or low-substrate temperature would cause the graphit or amorphous carbon component of the formed films t...

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