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

2010 Vol. 24, No. 4

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Experimental Study on the Membraneless Heavy Gas Cylinder and Gas Curtain Interfaces Impacted by a Weak Shock Wave
ZOU Li-Yong, LIU Jin-Hong, TAN Duo-Wang, HUANG Wen-Bin, BAI Jin-Song, LIU Cang-Li
2010, 24(4): 241-247 . doi: 10.11858/gywlxb.2010.04.001
PDF (631)
Abstract:
A modified shock tube apparatus has been developed in order to experimentally investigate the evolution process of a sulfur hexafluoride gas cylinder and gas curtain surrounded by air when impacted by a shock wave with a Mach number of 1.2. By designing the test section, the fog generator, the gas c...
Dynamic Behavior of Void Growth in Aluminum with a Preexisting Flaw under Intense Impact Loading
WANG Yong-Gang, LIU Hong-Wei
2010, 24(4): 248-254 . doi: 10.11858/gywlxb.2010.04.002
PDF (674)
Abstract:
By means of the explicit nonlinear dynamic finite element computer code LS-DYNA, the nucleation and growth of void in aluminum with a preexisting flaw under plate impact loading have been investigated. The results are as follows: firstly, the void nucleation occurs from the boundary of the preexisti...
Preliminary Studies on Real-Time Acoustic Emission Monitoring in Single Crystal Diamond Growth
LIU Lei, ZHANG Yuan-Pei, LAN Wei-Ke, LI He-Sheng, LI Mu-Sen
2010, 24(4): 255-259 . doi: 10.11858/gywlxb.2010.04.003
PDF (663)
Abstract:
The growth process of synthetic diamond single crystals under high-pressure and high-temperature (HPHT) was tested with acoustic emission (AE) technique. A real-time AE monitoring system was built by using a PCI-8 acoustic emission instrument and a LMD-800 hinge-type cubic-anvil press. The character...
First Principles Calculation of SiO2 at High Pressures
HAO Jun-Hua, WU Zhi-Qiang, WANG Zheng, JIN Qing-Hua, LI Bao-Hui, DING Da-Tong
2010, 24(4): 260-266 . doi: 10.11858/gywlxb.2010.04.004
PDF (704)
Abstract:
Total energy of SiO2 as a function of unit cell volume has been calculated for -quartz, rutile and CaCl2 structures using the density function theory (DFT) and Hartree-Fork (HF) method. According to the Murnaghan's equation of state, the bulk modulus B0 and B=dB/dp for these three structures have be...
Synchrotron Radiation X-Ray Diffraction Study of AlN Nanowires under High Pressures
SHEN Long-Hai, CUI Qi-Liang, LI Xue-Fei
2010, 24(4): 267-270 . doi: 10.11858/gywlxb.2010.04.005
PDF (648)
Abstract:
The high-pressure behavior of wurtzite AlN nanowires is studied up to 51.1 GPa by in situ angle dispersive X-ray diffraction using synchrotron radiation source and a diamond anvil cell. With increasing pressure up to 24.9 GPa, the wurtzite-to-rocksalt phase transition was observed. The rocksalt phas...
Molecular Dynamics Simulation of CO2-Expanded Liquids
WANG Wei-Bin, YIN Jian-Zhong
2010, 24(4): 271-278 . doi: 10.11858/gywlxb.2010.04.006
PDF (791)
Abstract:
Thermodynamic and transport properties of CO2-expanded methanol system and CO2-expanded ethanol system, as well as the diffusivities of p-chloronitrobenzene/CO2-expanded methanol system and benzonitrile/CO2-expanded ethanol system were modeled with molecular dynamics simulation method. The density d...
Understanding and Interpreting of the Measured Wave Signals in Impact Dynamics Studies
WANG Li-Li, ZHU Jue, LAI Hua-Wei
2010, 24(4): 279-285 . doi: 10.11858/gywlxb.2010.04.007
PDF (734)
Abstract:
The significance and difficulty of the multi-position measuring were analyzed when understanding and interpreting the wave signals measured in impact dynamic experiments. By combining the Lagrange inverse analysis with the Hopkinson pressure bar technique, a new method was proposed, which substantia...
Cavitation and Wear in the Micro Jewel Nozzle of Ultra-High Pressure Water Jet
YANG Min-Guan, WANG Yu-Li, KANG Can, YU Feng
2010, 24(4): 286-292 . doi: 10.11858/gywlxb.2010.04.008
PDF (665)
Abstract:
In an ultra-high pressure water jet cutting system, the micro jewel nozzle has important influences on the machining efficiency. Cavitation inside the jewel orifice affects the jet formation directly and is a crucial reason for the nozzle wear. By simulating the cavitation flow in the orifice at pre...
Preparation of Medium-Chain Fatty Acids (MCFA) Nano-Liposome by Means of High Pressure Microfluidization (HPM)
LIU Wei, LIU Wei-Lin, LIU Cheng-Mei, YANG Shui-Bing, ZHENG Hui-Juan, LIU Jian-Hua, WANG Jian-Hong
2010, 24(4): 293-299 . doi: 10.11858/gywlxb.2010.04.009
PDF (747)
Abstract:
Medium-chain fatty acids (MCFA) nano-liposome was prepared and characterized by means of high pressure microfluidization (HPM), sonication and microfiltration, respectively. The average diameter, encapsulated efficiency and stability were investigated after treatment with different pressures and pas...
Effects of High Pressure Heat Treatment on the Thermal Physical Properties of Aluminum Bronze
WANG Hai-Yan, LU Wei, LIU Jian-Hua
2010, 24(4): 300-304 . doi: 10.11858/gywlxb.2010.04.010
PDF (818)
Abstract:
Aluminum bronze was treated at 5 GPa and 750 ℃ for 15 min, after that its electric conductivity, thermal diffusion coefficient, heat capacity, and thermal conductivity between 25 and 600 ℃ were measured. Combining these data with the microstructure images, the effects of high pressure heat treatment...
Experimental Study on the Generating Condition of Over-Detonation during the Gaseous DDT
DUAN Ji-Yuan, WANG Jian, HE Zhi
2010, 24(4): 305-310 . doi: 10.11858/gywlxb.2010.04.011
PDF (781)
Abstract:
To verify the three current international views on the generating condition of over-detonation during gaseous deflagration-to-detonation transition (DDT), the DDT process of gaseous hydrogen-oxygen mixture was experimentally studied by using pressure sensors. The whole pressure histories of gaseous ...
A Reaction Rate Model of PBX-9502 Detonation
CHEN Jun, ZENG Dai-Peng, ZHANG Zhen-Yu
2010, 24(4): 311-315 . doi: 10.11858/gywlxb.2010.04.012
PDF (846)
Abstract:
Using Lagrange analysis method for high explosives, a simple detonation reaction rate model of explosive PBX-9502 was proposed. With this model, the longitudinal structure of detonation reaction zone of explosive PBX-9502 was obtained. By Comparing with experimental results and calculated results of...
Experimental Study on Underwater Explosion Performance of Aluminized Explosive
ZHANG Yuan-Ping, CHI Jia-Chun, GONG Yan-Qing, WANG Guang-Jun
2010, 24(4): 316-320 . doi: 10.11858/gywlxb.2010.04.013
PDF (744)
Abstract:
The blast shock wave pressure and the bubble pulse period of RS211, HL-1, HL-2 and TNT explosives were measured, and then the peak pressure, shock wave impulse, shock wave energy and bubble energy were obtained. The experimental results showed that in the studied range, the shock wave energies and t...

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