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Mechanical and reaction behavior of PTFE / Al / Fe2O3 under impact and quasi-static compression

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Document pages: 9 pages

Abstract: The mechanical and reaction behaviors of PTFE Al Fe2O3 composites were studied by quasi-static compression and drop weight tests. Two kinds of PTFE Al Fe2O3 composites were prepared with different quality of PTFE, and the reaction phenomena and stress-strain curves were recorded; The residue after the reaction was analyzed by X-ray diffraction (XRD). The results show that the strength of the material increases under quasi-static compression (from 37.1   MPa to 77.2 MPa). With the increase of PTFE content, the reaction only occurs in the materials with high PTFE content. XRD analysis shows that there is no reaction between Al and Fe2O3 under the same experimental conditions. In the drop weight test, it is found that the PTFE Al Fe2O3 samples with low PTFE contentbe more insensitive by high-speed photography, and a High Temperature Metal Slag Spray (HTMSS) phenomenon was observed in both kinds of PTFE Al Fe2O3 composites, indicating the existence of thermite reaction, which was confirmed by XRD. In PTFE Al Fe2O3 system, the reaction between PTFE and Al precedes the reaction between Al and Fe2O3.

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