Unknown

Dataset Information

0

Thermal Decomposition Mechanism of 1,3,5,7-Tetranitro-1,3,5,7-tetrazocane Accelerated by Nano-Aluminum Hydride (AlH3): ReaxFF-Lg Molecular Dynamics Simulation.


ABSTRACT: ReaxFF-low-gradient reactive force field with CHONAl parameters is used to simulate thermal decomposition of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) and AlH3 composite. Perfect AlH3 and surface-passivated AlH3 particles were constructed to mix with HMX. The simulation results indicate HMX is adsorbed on the surface of particles to form O-Al and N-Al bonds. The decomposition of HMX and AlH3 composite is an exothermic reaction without energy barrier, but the decomposition of pure HMX needs to overcome the energy barrier of 133.57 kcal/mol. Active nano-AlH3 causes HMX to decompose rapidly at low temperature, and the primary decomposition pathway is the rupture of N-O and C-N bonds. Adiabatic simulation shows that the energy release and temperature increase of HMX/AlH3 is much larger than those of the HMX system. Surface-passivated AlH3 particles only affect the initial decomposition rate of HMX. In HMX and AlH3 composites, the strong attraction of Al in AlH3 to O and the activation of the intermediate reaction by H2 cause HMX to decompose rapidly. The final decomposition products of pure HMX are H2O, N2, and CO2, and those of HMX/AlH3 are H2O, N2, and Al-containing clusters dominated by C-Al. The final gas production shows that the specific impulse of HMX/AlH3 is larger than that of HMX.

SUBMITTER: Zhao Y 

PROVIDER: S-EPMC7495736 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature

altmetric image

Publications

Thermal Decomposition Mechanism of 1,3,5,7-Tetranitro-1,3,5,7-tetrazocane Accelerated by Nano-Aluminum Hydride (AlH<sub>3</sub>): ReaxFF-Lg Molecular Dynamics Simulation.

Zhao Ying Y   Mei Zheng Z   Zhao Feng-Qi FQ   Xu Si-Yu SY   Ju Xue-Hai XH  

ACS omega 20200901 36


ReaxFF-low-gradient reactive force field with CHONAl parameters is used to simulate thermal decomposition of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) and AlH<sub>3</sub> composite. Perfect AlH<sub>3</sub> and surface-passivated AlH<sub>3</sub> particles were constructed to mix with HMX. The simulation results indicate HMX is adsorbed on the surface of particles to form O-Al and N-Al bonds. The decomposition of HMX and AlH<sub>3</sub> composite is an exothermic reaction without energy barrier  ...[more]

Similar Datasets

| S-EPMC6102661 | biostudies-literature
| S-EPMC4707061 | biostudies-literature
| S-EPMC5764161 | biostudies-literature
| S-EPMC7023237 | biostudies-literature
| S-EPMC7841798 | biostudies-literature
| S-EPMC4508024 | biostudies-literature
| S-EPMC3155356 | biostudies-literature
| S-EPMC9730309 | biostudies-literature
| S-EPMC9078507 | biostudies-literature
| S-EPMC8065102 | biostudies-literature