Research on the Ignition Height and Reaction Flame Temperature of PTFE/Al/Si/CuO with Different Mass Ratios of PTFE/Si

Xuan Zou,Xianwen Ran,Haifu Wang,Wenhui Tang,Pengwan Chen,Ping Liu,Jingyuan Zhou,Yiting Wu

doi:10.3390/ma14133464

Xuan Zou, Xianwen Ran + Show 6 more

Open Access

https://doi.org/10.3390/ma14133464

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Abstract

Recent studies have shown that the energy release capacity of Polytetrafluoroethylene (PTFE)/Al with Si, and CuO, respectively, is higher than that of PTFE/Al. PTFE/Al/Si/CuO reactive materials with four proportions of PTFE/Si were designed by the molding–sintering process to study the influence of different PTFE/Si mass ratios on energy release. A drop hammer was selected for igniting the specimens, and the high-speed camera and spectrometer systems were used to record the energy release process and the flame spectrum, respectively. The ignition height of the reactive material was obtained by fitting the relationship between the flame duration and the drop height. It was found that the ignition height of PTFE/Al/Si/CuO containing 20% PTFE/Si is 48.27 cm, which is the lowest compared to the ignition height of other Si/PTFE ratios of PTFE/Al/Si/CuO; the flame temperature was calculated from the flame spectrum. It was found that flame temperature changes little for the same reactive material at different drop heights. Compared with the flame temperature of PTFE/Al/Si/CuO with four mass ratios, it was found that the flame temperature of PTFE/Al/Si/CuO with 20% PTFE/Si is the highest, which is 2589 K. The results show that PTFE/Al/Si/CuO containing 20% PTFE/Si is easier to be ignited and has a stronger temperature destruction effect.

Highlights

In recent studies, energy release characteristics of Polytetrafluoroethylene (PTFE)/Al reactive material have been widely recognized [1,2,3]
Compared with TNT, the calorific value of the same volume of PTFE/Al is about 2.4 times that of TNT, which indicates that the PTFE/Al reactive material may become a new type of high-energy explosive [4]
The ignition height of four mass ratios of PTFE/Al/Si/CuO was calculated by fitting the relationship between flame duration and drop height

Summary

Introduction

Energy release characteristics of Polytetrafluoroethylene (PTFE)/Al reactive material have been widely recognized [1,2,3]. Compared with TNT, the calorific value of the same volume of PTFE/Al (mass ratio 73.5/26.5) is about 2.4 times that of TNT, which indicates that the PTFE/Al reactive material may become a new type of high-energy explosive [4]. Huang [6] studied the damaging effect of PTFE/Al fragments through experiments and found that the damaging effect of reactive fragments was significantly better than inert fragments It can be seen from the above that PTFE/Al has higher structural strength and calorific value compared with traditional explosives. The ignition height and reaction flame temperature of PTFE/Al/Si/CuO were obtained by the drop hammer and spectrophotometer system to study the influence of different mass ratios of PTFE/Si on the energy release characteristics of PTFE/Al/Si/CuO

Formulation Design of Reactive Materials

Specimen Preparation

Experimental Procedures

Calculation of Reactive Material Ignition Height

Calculation of Temperature of Reaction Flame

Conclusions