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Han Y.,Institute of Chemical Materials | Long X.-P.,China Academic of Engineering Physics | Huang H.-J.,Institute of Chemical Materials | Nie F.-D.,Institute of Chemical Materials | Huang Y.-M.,Institute of Chemical Materials
Binggong Xuebao/Acta Armamentarii | Year: 2012

In order to get the detonation front structure of TATB-based PBX explosive, the interface velocity between detonated PBX explosive and PMMA window was measured using all-fiber displacement interferometer (DISAR). The frequency sign in oscillograph was analyzed by the method based on short time Fourier transform and wavelet transform algorithms. The results reveal that there is not obvious inflection point in the history of particle velocity. Thermo-chemical code VLW was used to calculate the iso-entropy curves of detonation products of PBX, and 235 ns reaction time in the reaction zone of PBX was obtained by the impedance matching method. Source

Hu Y.,China Academic of Engineering Physics | Dan G.,China Academic of Engineering Physics | Du L.,China Academic of Engineering Physics | Zhang D.,China Academic of Engineering Physics | Mao B.,China Academic of Engineering Physics
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2013

The hydriding properties of Zr9Ni11 alloy at different temperatures (25~150°C) and various initial hydrogen pressures (10~160 kPa) were investigated. The results show that with the increase of temperature, the equilibrium pressure of the Zr9Ni11 alloy increases significantly, but its hydrogen absorption quantity decreases dramatically. When the temperature is less than 75°C, the hydriding reaction rate of Zr9Ni11 alloy increases with increasing of temperature; while the temperature is higher than 75°C, the hydriding reaction rate of the alloy decreases with increasing of temperature. The initial hydrogen pressure has a great influence on the kinetic properties of the alloy. When the initial pressure is lower than 50 kPa, the hydriding reaction rate of the alloy increases obviously with the increase of the initial hydrogen pressure, and even in the case of relatively low pressure, the alloy can still absorb hydrogen dramatically. The hydrogen absorption quantity and the equilibrium pressure of the alloy increase with the increase of the initial hydrogen pressure. The samples of the alloy before and after hydrogenation were analyzed by XRD, SEM(EDS) and TEM(SAED). After several hydriding-dehydriding cycles, the surface of the alloy which is homogeneous and smooth before hydrogenation becomes rough and crannied, and the ratio of Zr and Ni on the surface is varied. It is also found the amorphous states might be increased and mischcrystal formed through hydriding-dehydriding cycles. Zr9Ni11 alloy might be a promising candidate for extracting tritium according to our investigation. Copyright © 2013 Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved. Source

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