高压物理学报

1992 Vol. 6, No. 1

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The Effect of Boron Additives on the Oxidation Rate of Synthetic Diamond Monocrystals

ZHENG Zhou

1992, 6(1): 1-6 . doi: 10.11858/gywlxb.1992.01.001

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Abstract:
By means of molten KNO3 oxidation experiments were conducted on the discs cut from a large synthetic diamond monocrystal. The relative depth of oxidation formed at sector boundaries on oxidized (110) cross-section of the diamond monocrystals (boron-doped and non-boron-doped) were measured with a two...

The High Oxygen Pressure Synthesis of Metallic LaCuO3 and the XPS Study on Cu3+ State

ZHOU Jian-Shi

1992, 6(1): 7-14 . doi: 10.11858/gywlxb.1992.01.002

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Abstract:
In this work, on the basis of LaCuO3 synthesized at high oxygen pressure (~6.5 GPa) and temperature (~980 ℃) and of its structure determination, the Cu3+ ion in metallic state was first characterized, and the difference between the metallic and insulator state was studied. The compound of LaCuO3 syn...

An Investigation of the Equation of State of NaCl at High Pressure by Use of Gordon-Kim Model

WU Shao-Zeng, ZHANG Cheng-Xiang, WU Shu-Yan, WANG Rong, ZHU Hai-Jun

1992, 6(1): 15-22 . doi: 10.11858/gywlxb.1992.01.003

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Abstract:
Pair-potentials of ions in the NaCl crystal are calculated by using Gordon-Kim model and numerical solutions of Hartree-Fock wave functions for free ions. Results show that short range interactions have different properties for different pairs of ions, the cation-anion pair interaction potential is ...

Interference Diagnosis of Laser Induced Vapor Plume

YUAN Yong-Hua, LIU Chang-Ling, GUI Yuan-Zhen, ZHANG Ning

1992, 6(1): 23-29 . doi: 10.11858/gywlxb.1992.01.004

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Abstract:
Characterizations of the vapor plume from LY12 aluminum target irradiated by a focused normal mode pulsed Nd: glass laser beam have been studied by using of a plate shearing interferometer and the high speed photography. The frame photos show that the speed of shock wave in the air is bout 473 m/s, ...

Study on Vibration Spectra of cBN Synthesized under High Pressure and High Temperature

ZHANG Tie-Chen, YANG Jun, ZHAO Yong-Nian, ZOU Guang-Tian, CUI Qi-Liang

1992, 6(1): 30-36 . doi: 10.11858/gywlxb.1992.01.005

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Abstract:
Phonon absorption and reflection of the lattice vibration of different color cBN synthesized by static high-pressure high-temperature method were investigated, much information about its lattice vibrations being obtained. Three new spectrum lines of lattice vibration in the range from 1 000 cm-1 to ...

Research on Thermodynamic Mechanism of Diamond Surface Metallization

SUN Yu-Chao

1992, 6(1): 37-47 . doi: 10.11858/gywlxb.1992.01.006

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Abstract:
The wetting of diamond by three kinds of liquid alloy and its surface metallization by means of solid contact techniques were systematically studied. The micro structure of the surface-metallized diamond in the matrix alloy as well as its chemical compositions distribution were investigated by SEM a...

The Compression Behavior of Raman Active Mode E2g of Graphite and the Pressure Effect of Force Constant of CC Bonding

ZHAO Yong-Nian, ZHANG Zhi-Lin, CUI Qi-Liang, LIU Zhen-Xian, ZOU Guang-Tian

1992, 6(1): 48-53 . doi: 10.11858/gywlxb.1992.01.007

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Abstract:
The frequency changes of Raman active mode E2g of graphite were measured with pressure in the range of 0 to 13 GPa. The results show that a discontinuity in d/dp appeared near 4 GPa and that d/dp is larger before the discontinuous point than behind it. This may be caused by the distortion of the hex...

The Dependence of Constitutive Model on the Density, Temperature, Pressure and Strain Rate

LI Mao-Sheng, WANG Zheng-Yan, CHEN Dong-Quan, WANG Xiao-Sha

1992, 6(1): 54-57 . doi: 10.11858/gywlxb.1992.01.008

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Abstract:
We introduce strain rate into constitutive model and integrate dynamic and static yield into the same model. Results of computation for 2024Al are in good agreement with experiments.

Study on the Spallation Behavior of Tungsten Alloy

ZENG Yuan-Jin, JING Fu-Qian, ZHANG Wan-Jia

1992, 6(1): 58-67 . doi: 10.11858/gywlxb.1992.01.009

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Abstract:
Spallation behavior of a kind of tungsten alloy, with composition percent by weight W90%-Ni6.8%-Fe2.7%-Cr0.5% and manufactured by powder metallurgical method, was investigated by using a compressed gas gun as impact loading device. The peak stress in target is 5~10 GPa, stress duration 0.2~0.6 s. Th...

A Plating Manganin Piezoresistance Gauge

SHI Shang-Chun, ZHANG Qing-Fu, LUO Jiao-Ming, CHENG Ju-Xin, CHEN Pan-Sen

1992, 6(1): 68-74 . doi: 10.11858/gywlxb.1992.01.010

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Abstract:
The magnetically controlled cathode plasma sputtering technique has been successfully used to manufacture a plating-type manganin piezoresistance gauge on a mica matrix plate. Calibration experiments under pressures 5 to 6 GPa show that the piezoresistance behavior is well-reproduceable. The pressur...

Phase Decomposition of FexN Compounds under High Pressures

WEI Yu-Nian, SUN Ke, FENG Yuan-Bing, YAO Yu-Shu, LIU Shi-Chao, WANG Wen-Kui

1992, 6(1): 75-80 . doi: 10.11858/gywlxb.1992.01.011

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Abstract:
The effect of pressure on the decomposition of compounds FexN at room temperature has been investigated X-ray diffraction analysis shows that high pressure prompts nitrogen atoms precipitating from the lattice of FexN compounds, causing phase decomposition and forming parent phase and -Fe. This phen...

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Founded in 1987, monthly

Hosted by:Institute of Fluid Physics, CAEP

Sponsored by:Topical Committee of High Pressure of Chinese Physical Society Sichuan Physical Society

Editor-in-Chief:MA Yanming

1992 Vol. 6, No. 1

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