Effects of Aluminum on Thermal Decomposition of ε-hexanitrohexaazaisowurtzitane

摘要

The effect of aluminum particle size (10 urn and 50 nm) on the thermal decomposition of ε-hexanitrohexaazaisowurtzitane (HNIW) was investigated using differential scanning calorimetry (DSC), thermogravimetry-derivative thermogravimetry (TG-DTG), and DSC-TG, respectively. The results showed that addition of mirco and nano-Al powders had little effects on the endothermic peak of HNIW, while the exothermic peak temperature decreased. The kinetic parameters of thermal decomposition of Al/HNIW were obtained by Kissinger and Flynn-Wall-Ozawa methods. The decomposition mechanisms of HNIW were demonstrated by the non-isothermal kinetics in the absent and presence of 30 wt% micro- or nano-Al, which are conformed to Avrami-Erofeev equation. The factor of nucleus growth for the 50 nm Al/HNIW mixture is found to be n=1/4, as compared to n=1/3 for HNIW with and without the micro-sized Al.