Explosion Energy Release Characteristics of Composite Charge Containing Al/PTFE/TiH2 Ternary Reactive Materials and RDX

doi:10.12382/bgxb.2023.1211

Abstract

Abstract:

To investigate the detonation characteristics of composite charges containing the reactive materials and explosives,a composite charge containing Al/PTFE/TiH₂ ternary reactive materials and RDX explosives is prepared.The influences of TiH₂ powder content on detonation performance and afterburning effect are systematically studied by the air blast experiment and the colorimetric temperature measurement technology.The experimental results show that the shock wave parameters,explosion fireball duration and maximum average temperature of the composite charges increase first and then decrease with the increase in TiH₂ powder content,reaching the maximum values when the content of TiH₂ powders is 10%.Compared with the composite charge without TiH₂ powders,the shock wave peak pressure,explosion fireball duration and maximum average temperature of composite charges containing 10% of TiH₂ powders are increased by 21.6%,105.9% and 7.1%,respectively.Furthermore,the effects of TiH₂ and Ti powders on the explosion energy release characteristics of composite charges are compared.It is found that the enhancement effects of TiH₂ powders on the explosion shock wave parameters and fireball temperature field of the composite charge are superior to those of Ti powders due to the participation of free hydrogen in the afterburning reaction.The research results can provide valuable references for the application design of Al/PTFE/TiH₂ ternary reactive materials for composite charges as well as the weapon damage assessment.

Key words: reactive material, composite charge, air blast, afterburning effect, colorimetric temperature measurement

CLC Number:

O381

LI Danyi, CHENG Yangfan, LI Xiang, WANG Hao, ZHAO Changxiao, SHEN Zhaowu. Explosion Energy Release Characteristics of Composite Charge Containing Al/PTFE/TiH₂ Ternary Reactive Materials and RDX[J]. Acta Armamentarii, 2025, 46(1): 231211-.

Figures/Tables 17

Fig.1 Particle size distribution of experimental powders

Fig.2 SEM images of experimental materials

Table 1 Formulations of reactive materials in composite charge samples

样品编号	质量分数/%			活性材料理论密度/(g·cm^-3)
样品编号	Al/PTFE	TiH₂	Ti	活性材料理论密度/(g·cm^-3)
A1	100	0	0	2.31
A2	95	5	0	2.36
A3	90	10	0	2.41
A4	85	15	0	2.46
A5	80	20	0	2.52
B	90	0	10	2.43

Fig.3 Experimental samples

Fig.4 Schematic diagram of air blast experimental system

Fig.5 Tungsten lamp calibration experiment

Fig.6 Explosion fireball propagation of composite charge Sample A1

Fig.7 Explosion fireball propagation of composite charge Sample A3

Fig.8 Reaction mechanism of composite charge sample

Fig.9 Explosion fireball duration of composite charges with different contents of TiH2 powders

Fig.10 Transient explosion temperature field of composite charge Sample A1

Fig.11 Transient explosion temperature field of composite charge Sample A3

Fig.12 Average explosion temperature-time curves of composite charges with different contents of TiH2 powders

Fig.13 Maximum average explosion temperatures of composite charges with different contents of TiH2 powders

Fig.14 Pressure-time curves of composite charges with different contents of TiH2 powders in air blast experiment

Fig.15 Shock wave parameters of composite charges with different contents of TiH2 powders in air blast experiment

Fig.16 Explosion characteristic parameters of different composite charges

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Explosion Energy Release Characteristics of Composite Charge Containing Al/PTFE/TiH₂ Ternary Reactive Materials and RDX

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