The Mechanical and Reaction Behavior of PTFE/Al/Fe₂O₃ under Impact and Quasi-Static Compression

Abstract

Quasi-static compression and drop-weight test were used to characterize the mechanical and reaction behavior of PTFE/Al/Fe 2 O 3 composites. Two kinds of PTFE/Al/Fe 2 O 3 composites were prepared with different mass of PTFE, and the reaction phenomenon and stress-strain curves were recorded; the residuals after reaction were analyzed by X-ray diffraction (XRD). The results showed that, under quasi-static compression condition, the strength of the materials is increased (from 37.1 Mpa to 77.2 Mpa) with the increase of PTFE, and the reaction phenomenon occurred only in materials with high PTFE content. XRD analysis showed that the reaction between Al and Fe 2 O 3 was not triggered with identical experimental conditions. In drop-weight tests, PTFE/Al/Fe 2 O 3 specimens with low PTFE content were found to be more insensitive by high-speed photography, and a High Temperature Metal Slag Spray (HTMSS) phenomenon was observed in both kinds of PTFE/Al/Fe 2 O 3 composites, indicating the existence of thermite reaction, which was confirmed by XRD. In PTFE/Al/Fe 2 O 3 system, the reaction between PTFE and Al precedes the reaction between Al and Fe 2 O 3 .

Effects of Recycled Fe2O3 Nanofiller on the Structural, Thermal, Mechanical, Dielectric, and Magnetic Properties of PTFE Matrix

“…Madusanka et al synthesized thick film gas sensor using PTFE and α-Fe 2 O 3 nanoparticles [ 16 ] while Kang et al fabricated porous Fe 2 O 3 -PTFE nanofiber membranes for photocatalysis applications [ 17 ]. Moreover, PTFE-Al-Fe 2 O 3 composites were prepared to be used as reactive materials [ 18 ]. The electro-Fenton system was synthesized by combining multiwall carbon nanotubes and Fe@Fe 2 O 3 nanowires with PTFE [ 19 ].…”

Effect of Sintering Factors on Properties of Al-Rich PTFE/Al/TiH2 Active Materials

“…In the last ten years, the main research based on Al/PTFE reaction materials is as follows: (1) study on the composition ratio and mixing methods of Al/PTFE-based active materials; (2) study on the mechanical properties, reaction characteristics, impact sensitivity, ignition mechanism and hot spot formation mechanism of crack tip of Al/PTFE-based active materials; (3) study on the energy release characteristics of Al/PTFE-based active materials; (4) study on the establishment of a theoretical model of impact-induced chemical reaction of Al/PTFE-based active materials. Among them, some scholars introduce high density metals such as Ni [ 13 ], W [ 14 , 15 ] and Ta [ 16 ] into Al/PTFE-based active materials to improve their hardness, density, strength and other characteristics; some scholars have added metal oxides CuO [ 17 ], Fe 2 O 3 [ 18 ] and MnO 2 [ 19 ] to Al/PTFE-based active materials to improve their reaction characteristics; some scholars have added high-energy additives such as TiH 2 [ 20 ] and ZrH 2 [ 21 ] to Al/PTFE-based active materials to improve their energy release characteristics. Based on published literature of the above studies, it can be found that most scholars mainly study the influence of distribution ratio, particle size and other factors on material properties through a given sintering control curve, while few scholars study the influence of sintering control factors on material properties.…”

Effect of addition of HTa to Al/PTFE under quasi-static compression on the properties of the developed energetic composite material

“…Li et al 9 studied PTFE/Al/CuO prepared from nano-Al and nano-CuO, and found that PTFE is both an oxidizing agent and a reducing agent, and excess Al also reacts with CuO and releases a large amount of heat. Huang et al 10 studied the mechanical properties of PTFE/Al/Fe 2 O 3 composites. It is found that as the content of PTFE increases, the strength of the material increases and only materials with high PTFE content will react.…”