Study on thermal stability of HNS in adiabatic environment

The thermal stability of heat-resistant explosives plays an important role in their applications. This article uses adiabatic calorimetry to study the thermal stability of HNS-II, HNS-II, nickel chromium alloys of different quantities, and HNS-II after high-temperature storage in an adiabatic environment. SEM, XRD, and other methods are used to assist in analyzing the samples before and after decomposition. The results showed that the larger the sample size, the relatively less heat loss during thermal decomposition of the sample, and the faster the adiabatic decomposition rate. When the sample size was below 70mg, due to the endothermic effect of the sample ball, the temperature rise rate of sample decomposition was lower, and the decomposition process was relatively mild. The morphology of the residue after decomposition remained elongated; HNS II has good compatibility with nickel chromium alloy in adiabatic environments. In addition, compared with DSC, ARC can more accurately characterize the changes in material thermal stability: ARC testing shows that the thermal stability of HNS II has changed after high-temperature storage.