1989 Vol. 3, No. 3

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Effects of Recrystallized Graphite on the Nucleation of Diamond in Film Growth Reaction
WANG Guang-Zu, ZHENG Zhou, CHEN Lun
1989, 3(3): 177-180 . doi: 10.11858/gywlxb.1989.03.001
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Abstract:
On the basis of the experimental phenomena, it has been analyzed in this paper that the dispersion and dissolving processes of the carbon sources in the solvent-catalyst metal and the formation of the recrystallized graphite in the early period of the diamond synthesis. From the relationship between...
Phonon Generation and Energy Localization by Moving Screw Dislocations in Rapid Deformation
DONG Lian-Ke, WANG Ke-Gang
1989, 3(3): 181-186 . doi: 10.11858/gywlxb.1989.03.002
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Abstract:
From the viewpoint of quantum mechanics, the phonon field generated by a moving screw dislocation is examined. It is shown that phonon emission is in the neighborhood of active slip planes and phonon energy is locally concentrated in these planes where they form hot spots. Finally, the phonon energy...
Sound Velocities at High Pressures and Shock-Melting of Copper
HU Jin-Biao, JING Fu-Qian, CHENG Ju-Xin
1989, 3(3): 187-197 . doi: 10.11858/gywlxb.1989.03.003
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Abstract:
Sound velocities of copper at high shock pressures were determined by using optical analyzer technique under on-dimensional strain condition. The measured pressure range was from 125 GPa to 170 GPa. Combined with the data given earlier by Broberg, Morris et al., Altshuler et al., and ours, a compreh...
High-Pressure Synthesis and Luminescence Characters of Er3+-Activated Strontium Silicate
YANG Jing-Hai, WANG Yi-Feng, LIU Hong-Jian, SU Wen-Hui, LI Bin, OUYANG Chang-Jun, XING Zhi-Ming
1989, 3(3): 198-202 . doi: 10.11858/gywlxb.1989.03.004
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Abstract:
Sr2SiO4:Er3+Bi3+, SrSiO3:Er3+Bi3+ were synthesized by a high-pressure method for the first time. The effect of synthesizing pressure and temperatures on luminescence properties and structures of the samples was studied. The samples synthesized by both high-pressure and atmosphere method were analyze...
Symmetrical and Unsymmetrical Frictions in Pyrophyllite Medium on High-Temperature Measurement in Piston-Cylinder Type High-Pressure Chamber
SHEN Zhong-Yi, YAO Yu-Shu, ZHANG Yun, WANG Song-Tao
1989, 3(3): 203-210 . doi: 10.11858/gywlxb.1989.03.005
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Abstract:
Frictions in pyrophyllite medium at elevated temperature in piston-cylinder type apparatus are examined by measuring the melting curve of lead. The obtained results show evident unsymmetrical frictions grown out during pressure calibration at higher temperatures. As a result, the widely used fixed p...
Experimental Studies on the Crystallization of Amorphous Fe40Ni40P12B8 Alloy under Shock Loading
HE Hong-Liang, JIN Xiao-Gang, CHEN Pan-Sen, WANG Wen-Kui
1989, 3(3): 211-220 . doi: 10.11858/gywlxb.1989.03.006
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Abstract:
The shock-induced crystallization of amorphous Fe40Ni40P12B8 alloy was investigated in this paper. The shock loading condition was produced by the impact of high velocity projectile, which had been accelerated by a two-stage light-gas gun to a definite velocity. The experimental results indicated as...
The Effects of the Type and Amount of the Grain Boundary Phase in s-Type Polycrystalline Diamond on Its Physical Properties
YU Hong-Chang, LI Shang-Jie
1989, 3(3): 221-225 . doi: 10.11858/gywlxb.1989.03.007
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Abstract:
There are mainly two types of sintered typed polycrystalline diamond with or without additives. This article concerns only the first type on and deals with the effect of the type and amount of the grain boundary phases on the relative wear resistance, strength and thermostability. We found both the ...
Studies on the Shock Adiabatics and Equation-of-State of Nandan Iron Meteorite
FU Shi-Qin, JIN Xiao-Gang, CHEN Pan-Sen
1989, 3(3): 226-233 . doi: 10.11858/gywlxb.1989.03.008
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Abstract:
The shock adiabatic of Nandan iron meteorite was measured by using impedance-match method and a two-stage light-gas gun as its loading tool. Pressure ranges are from 62 GPa to 208 GPa. The shock velocity D versus particle velocity u can be expressed as D=3.884+1.840u-0.12267u2 (km/s). With the assum...
A Semi-Empirical Equation for Estimating the Micro-Jet Ejection from Shocked Free-Surface
HAN Chang-Sheng
1989, 3(3): 234-240 . doi: 10.11858/gywlxb.1989.03.009
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Abstract:
Based on the classical steady-jet theory and the equivalent linear mass assumption proposed by the author, a semi-empirical analytic equation for estimating the micro-jet ejection mass quantity from shocked free-surface with artificial wedged-grooves is developed in this paper. Comparing with a few ...
Influence of Pressure on the TlPbxBaCa3Cu3O Superconductors
LIU Zhen-Xing, LIN Ming-Zhu, TANG Ming-Hua, MENG Xian-Ren, LIN Zhen-Jin, SANG Li-Hua, TU Qing-Yun, HAN Wei, REN Yan-Ru
1989, 3(3): 241-245 . doi: 10.11858/gywlxb.1989.03.010
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Abstract:
Pb doped TlBaCaCuO compounds with nominal composition TlPbxBaCa3Cu3Oy have been synthesized and their physical properties have been studied. The pressure-dependence of Tc has also been studied. It is found that Tc increases with pressure at a rate of dTc0/dp=2.2 K/GPa for x=0.5, which is higher than...
A New Calculation of Energy and Polarizability of Hydrogen-Like Atom under High Pressure
SUN Feng-Guo, LIN Hua-Ling
1989, 3(3): 246-249 . doi: 10.11858/gywlxb.1989.03.011
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Abstract:
The energy and polarizability of a model hydrogen-like atom limited in a spherical shell of radius r0 are calculated using new trial wave-function. The energy and polarizability are obtained as functions of the radius r0 and corresponding pressure p. In comparison with results in reference [1], ours...
The Nucleation Character of Diamond in Two Kinds of Raising Pressure Program
ZHAO Jian-Zhong, YANG Zong-Qing, YU Hong-Chang, SU Wen-Hui
1989, 3(3): 250-255 . doi: 10.11858/gywlxb.1989.03.012
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Abstract:
In the temperature range between 1 573 to 1 663 K, the pressure inhibiting the nucleation of diamond of recrystallized graphite is about 0.4 GPa. This pressure is related to the formation time of the recrystallized graphite. X-ray diffraction analyses indicate that the d002 of recrystallized graphit...