Atomic-Scale Reaction Mechanism of Impact Ignition in Al/Si/PTFE Reactive Materials
- 1State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China
- 2College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
Abstract
Non-metallic polytetrafluoroethylene (PTFE)-based reactive materials (RMs) exhibit relatively high energy density; however, the low shock sensitivity hinders their widespread application in space debris protection. To develop lightweight, high-energy PTFE-based RMs with superior shock-induced energy-release performance, Al/Si/PTFE ternary RMs were produced by a cold pressing and sintering process with additions of Aluminum (Al) and Silicon (Si) powders. The effect of Al and Si content on the impact ignition and energy release of Al/Si/PTFE was investigated by split Hopkinson pressure bar (SHPB) experiments. High-speed photography shows that the addition of Al powder can effectively lower the reaction threshold of Si/PTFE and enhance its energy release efficiency. The critical reaction temperature threshold of Al1.2Si1PTFE is lower than that of other Al/Si/PTFE RMs, and its primary and secondary ignition intensities are the highest. The micro-ignition mechanism of the Al/Si/PTFE RMs was revealed by molecular dynamics (MD) simulations and differential scanning calorimetry (DSC) experiments. The synergistic effect of Al and Si particles in Al1.2Si1PTFE under a shock wave produces a more pronounced local temperature rise and more hotspots, ultimately releasing the greatest extent of reaction.
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BibTeX
@article{gong2026atomicscale,
title = {{Atomic-Scale Reaction Mechanism of Impact Ignition in Al/Si/PTFE Reactive Materials}},
author = {Liangfei Gong and Lieke Ma and Xiaomalong Pu and Bo Li and Yulian Liu and Ao Mei and Jie Wang},
journal = {Polymers},
year = {2026},
month = oct,
doi = {10.3390/polym18192432},
url = {https://europepmc.org/article/PMC/PMC13667215},
note = {CC BY},
}
RIS
TY - JOUR
TI - Atomic-Scale Reaction Mechanism of Impact Ignition in Al/Si/PTFE Reactive Materials
AU - Liangfei Gong
AU - Lieke Ma
AU - Xiaomalong Pu
AU - Bo Li
AU - Yulian Liu
AU - Ao Mei
AU - Jie Wang
PY - 2026
DA - 2026/10/01
JO - Polymers
DO - 10.3390/polym18192432
UR - https://europepmc.org/article/PMC/PMC13667215
AB - Non-metallic polytetrafluoroethylene (PTFE)-based reactive materials (RMs) exhibit relatively high energy density; however, the low shock sensitivity hinders their widespread application in space debris protection. To develop lightweight, high-energy PTFE-based RMs with superior shock-induced energy-release performance, Al/Si/PTFE ternary RMs were produced by a cold pressing and sintering process with additions of Aluminum (Al) and Silicon (Si) powders. The effect of Al and Si content on the impact ignition and energy release of Al/Si/PTFE was investigated by split Hopkinson pressure bar (SHPB) experiments. High-speed photography shows that the addition of Al powder can effectively lower the reaction threshold of Si/PTFE and enhance its energy release efficiency. The critical reaction temperature threshold of Al1.2Si1PTFE is lower than that of other Al/Si/PTFE RMs, and its primary and secondary ignition intensities are the highest. The micro-ignition mechanism of the Al/Si/PTFE RMs was revealed by molecular dynamics (MD) simulations and differential scanning calorimetry (DSC) experiments. The synergistic effect of Al and Si particles in Al1.2Si1PTFE under a shock wave produces a more pronounced local temperature rise and more hotspots, ultimately releasing the greatest extent of reaction.
SN - 2073-4360
ER -