LAUSR

In order to investigate the energy release behavior of Al/polytetrafluoroethylene (Al/PTFE) reactive materials (RMS) more effectively, a closed chamber test system that could simultaneously examine the overpressure and the temperature is designed. The maximum overpressure with the range of 2.18–6.74 MPa and the temperature with the range of 1701–2756 K are obtained for 4–10 g RMS powder in a confined space of 8.8 l. The theoretical calculation is done for the internal energy of air (IEA), internal energy of gas product, internal energy of solid product, pressure potential energy of gas mixture (PPEGM), internal energy of chamber wall (IECW), total released energy (TRE), and specific energy (SE). The energy release events show a distinguished feature at different moments. PPEGM and IEA with a large percentage of SE are the main energy release at the beginning of the events while IECW and IEA play a more important part at the end instead, which corresponds to the energy transfer from PPEGM to IECW in essence. The maximum ratio of PPEGM and IECW to TRE is in the range of 40.76%–58.98% and 45.11%–64.56%, respectively. The obtained SE is very close to the energy content of RMS in theory, indicating that it is a competitive method to evaluate the released energy for RMS. This work is vital to understanding their damage mechanism clearly.