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Science and Technology of Energetic Materials

Vol.80, No.4 (2019)

Research paper

Improvement of aluminized explosives and reaction mechanism of CL-20 with Al or Al-Mg alloy
Xiaoxiang Mao, Longfei Jiang, Chenguang Zhu, Xiaoming Wang, and Dihua Ou Yang
p.115-120

Abstract

There is a non-ideal problem account of release of energy for aluminized explosives. In this paper, the ignition performance experiments were carried out based on three kinds of composite explosives (RDX, HMX and CL-20) with different mass percentages of aluminum (Al) powder or aluminum-magnesium (Al-Mg) alloy powder. It was found that under the decomposition temperature or ignition temperature of RDX and HMX, the metal powder not only fails to participate in the reaction, but also hinders the complete combustion of the explosives. Different to RDX and HMX, CL-20 mixed with 10% Al or Al-Mg alloy released more energy than pure CL-20, which proves the participation of the metal powder in the reaction at the CL-20 ignition temperature. Based on the analysis of thermodynamic properties of explosives, it is concluded that since CL-20 has greater explosion heat and enthalpy of formation than RDX and HMX, a localized high-temperature region of inhomogeneous composite explosive at micro-scale forms and causes the metal particles reacting.

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Keywords

explosive, aluminum powder, ignition performance, TG-DTA

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