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Title: Insensitive high-energy energetic structural material of tungsten-polytetrafluoroethylene-aluminum composites

Abstract

Energetic structural material is a kind of materials that are inert under normal conditions but could produce exothermic chemical reaction when subjected to impact. This report shows a kind of energetic structural material of tungsten (W)-polytetrafluoroethylene (PTFE)-aluminum (Al) with density of 4.12 g/cm{sup 3}, excellent ductility and dynamic compressive strength of 96 MPa. Moreover, 50W-35PTFE-15Al (wt%) can exhibit a high reaction energy value of more than 2 times of TNT per unit mass and 5 times of TNT per unit volume, respectively, but with excellent insensitivity compared with traditional explosives. Under thermal conditions, the W-PTFE-Al composite can keep stable at 773 K. Under impact loading, when the strain rate up to ∼4820 s{sup −1} coupled with the absorbed energy per unit volume of 120 J/cm{sup 3}, deflagration occurs and combustion lasts for 500 μs. During impact compressive deformation, the PTFE matrix is elongated into nano-fibers, thus significantly increases the reaction activity of W-PTFE-Al composites. The nano-fiber structure is necessary for the reaction of W-PTFE-Al composites. The formation of PTFE nano-fibers must undergo severe plastic deformation, and therefore the W-PTFE-Al composites exhibit excellent insensitivity and safety. Furthermore, the reaction mechanisms of W-PTFE-Al composites in argon and in air are revealed.

Authors:
; ;  [1];  [1]
  1. School of Material Science and Engineering, Beijing Institute of Technology, No.5 yard, Zhong Guan Cun South Street, Beijing, 100081 (China)
Publication Date:
OSTI Identifier:
22492188
Resource Type:
Journal Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 11; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2158-3226
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; ARGON; COMPARATIVE EVALUATIONS; COMPOSITE MATERIALS; COMPRESSION STRENGTH; DEFORMATION; DENSITY; DUCTILITY; FIBERS; LOADING; MATRIX MATERIALS; PLASTICITY; STRAIN RATE; TEFLON; TNT; TUNGSTEN

Citation Formats

Wang, Liu, Liu, Jinxu, Zhang, Xinbo, Li, Shukui, and State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, No. 5 yard, Zhong Guan Cun South Street, Beijing 100081. Insensitive high-energy energetic structural material of tungsten-polytetrafluoroethylene-aluminum composites. United States: N. p., 2015. Web. doi:10.1063/1.4936557.
Wang, Liu, Liu, Jinxu, Zhang, Xinbo, Li, Shukui, & State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, No. 5 yard, Zhong Guan Cun South Street, Beijing 100081. Insensitive high-energy energetic structural material of tungsten-polytetrafluoroethylene-aluminum composites. United States. https://doi.org/10.1063/1.4936557
Wang, Liu, Liu, Jinxu, Zhang, Xinbo, Li, Shukui, and State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, No. 5 yard, Zhong Guan Cun South Street, Beijing 100081. 2015. "Insensitive high-energy energetic structural material of tungsten-polytetrafluoroethylene-aluminum composites". United States. https://doi.org/10.1063/1.4936557.
@article{osti_22492188,
title = {Insensitive high-energy energetic structural material of tungsten-polytetrafluoroethylene-aluminum composites},
author = {Wang, Liu and Liu, Jinxu and Zhang, Xinbo and Li, Shukui and State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, No. 5 yard, Zhong Guan Cun South Street, Beijing 100081},
abstractNote = {Energetic structural material is a kind of materials that are inert under normal conditions but could produce exothermic chemical reaction when subjected to impact. This report shows a kind of energetic structural material of tungsten (W)-polytetrafluoroethylene (PTFE)-aluminum (Al) with density of 4.12 g/cm{sup 3}, excellent ductility and dynamic compressive strength of 96 MPa. Moreover, 50W-35PTFE-15Al (wt%) can exhibit a high reaction energy value of more than 2 times of TNT per unit mass and 5 times of TNT per unit volume, respectively, but with excellent insensitivity compared with traditional explosives. Under thermal conditions, the W-PTFE-Al composite can keep stable at 773 K. Under impact loading, when the strain rate up to ∼4820 s{sup −1} coupled with the absorbed energy per unit volume of 120 J/cm{sup 3}, deflagration occurs and combustion lasts for 500 μs. During impact compressive deformation, the PTFE matrix is elongated into nano-fibers, thus significantly increases the reaction activity of W-PTFE-Al composites. The nano-fiber structure is necessary for the reaction of W-PTFE-Al composites. The formation of PTFE nano-fibers must undergo severe plastic deformation, and therefore the W-PTFE-Al composites exhibit excellent insensitivity and safety. Furthermore, the reaction mechanisms of W-PTFE-Al composites in argon and in air are revealed.},
doi = {10.1063/1.4936557},
url = {https://www.osti.gov/biblio/22492188}, journal = {AIP Advances},
issn = {2158-3226},
number = 11,
volume = 5,
place = {United States},
year = {Sun Nov 15 00:00:00 EST 2015},
month = {Sun Nov 15 00:00:00 EST 2015}
}