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Air explosion characteristics of a novel TiH$_2$/RDX composite explosive
B. Xue,
Hong-Hao Ma,
Zhao-Wu Shen Modern Mechanics Department, University of Science and Technology of China, Hefei, Anhui, P.R. China
Abstract:
An explosive mixture of cyclotrimethylenetrinitramine (RDX) and titanium hydride (TiH
$_2$) is introduced. To investigate the explosion characteristics of the composite explosive, charges with various contents of the TiH
$_2$ powder are prepared and tested in air explosion experiments. Results show that the peak overpressure, positive duration, and positive specific impulse increase as the content of TiH
$_2$ increases from 10 to 20%, as compared to passivated RDX. The peak overpressure, duration, and specific impulse have the largest increase of 6, 9, and 23%, respectively, as compared to passivated RDX, when the TiH
$_2$ content is 20%. The effect of the TiH
$_2$ particle size is also considered. The charge containing the TiH
$_2$ powder with a mean particle size of 4.6 mm shows higher values of the three parameters than that containing 45-mm TiH
${}$ particles under the condition of the same content of TiH
${}$. However, the relationship between the detonation velocity and TiH
$_2$ content is a linear inverse proportion, and the particle size of TiH
$_2$ has a minor effect on it. Solid explosion products of the TiH
$_2$/RDX composite explosive are analyzed by x-ray photoelectron spectroscopy (XPS) and energy dispersive x-ray spectroscopy (EDX). TiO
$_2$ is found in explosion products, which is believed to form due to TiH
$_2$ oxidation.
Keywords:
titanium hydride, RDX, composite explosives, air explosion, particle size.
UDC:
533.231
Received: 17.01.2014
Revised: 10.09.2014
DOI:
10.15372/FGV20150414
Fulltext:
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