Combustion characterization of hydrazinium nitrate/energetic binder/Alex based model propellants

The hydrazinium nitrate (N₂H₄1HNO₃HN) can be considered as a candidate for using instead of ammonium perchlorate (AP) in eco-friendly solid propellant formulations. In combination with energetic binder it provides reasonably high energetic parameters of solid propellant. In addition, the substitution of AP by HN leads to decrease in the combustion temperature. The combustion of the HN based metallized propellants containing energetic binder has been investigated. The effect of partial substitution of commercial Al powder by Alex on the propellant combustion characteristics has been examined. The burning law was measured in the pressure range 20–80 atm, the ignition delay time and temperature profile were measured at atmospheric pressure. Some qualitative observations on the combustion behavior of the propellants under study have been made by analyzing the video camera and recoil force transducer records.