Dynamic response behavior of PTFE/Al/oxide reactive materials

PTFE/Al, as a kind of typical reactive material with a high energy density and impact-induced reaction characteristics, has attracted extensive attention. Three kinds of PTFE/Al/oxide materials were designed and fabricated by introducing CuO, Fe2O3, and MoO3 into PTFE/Al, and their dynamic mechanical responses were studied by SHPB experiments. The results showed that the sample cracked undergoing high strain rate compression, the metal particles peeled off from the matrix on the microstructure, and many PTFE filaments formed on both ends of the crack. PTFE/Al/oxide presents typical elastoplastic characteristics with strain rates ranging from 3000 s-1 to 7000 s-1. With the increase of strain rate, the failure stress and failure strain of the three materials increased, showing a significant strain rate strengthening effect. Among them, PTFE/Al/CuO has the highest failure stress and strain.