DETONATION PROPERTIES OF PRESSED AND LIQUID HYDRAZINE NITRATE*

In this work, the structure of the steady-state detonation waves, the critical diameter, detonation parameters and the dependence of detonation velocity on the charge diameter for pressed hydrazine nitrate (HN) and the HN/water solution were investigated by a VISAR laser interferometer. For pressed HN, it was found that the critical diameter drops with the initial density decrease. For pressed HN, the change of the detonation velocity with variation of the initial density is not monotonic, but has a characteristic s-shape. For the water solution of HN, the detonation velocity decreases linearly with increasing concentration of water. The limits of detonation propagation were found for HN/water solution. It doesn’t detonate at a water concentration exceeding 33 wt % at room temperature.
Experiments on the determination of Hugoniot and initiation of detonation under shock wave action for pressed HN were carried out with samples of maximum density (1.68 g/cc). The results of the conducted experiments show the low shock wave sensitivity, which is much lower than that of TNT. A noticeable reaction rate behind the front of the initiating shock wave in charges of maximum density is observed only at a pressure above 20 GPa.