Cover Picture: Energy Performance and Aging of RDX‐based TiH₂, MgH₂ Explosive Composites (Prop., Explos., Pyrotech. 7/2018)

Abstract

The cover picture shows the RDX based MgH2 (MHR‐10) and TiH2 (THR‐10) explosive charges aging in the ambient environment. During the 2‐year storage tests, the weights and sizes of MHR‐10 charges were increased significantly because of the hydrolysis and decomposition of MgH2 . Micro‐cracks and defects due to hydrogen generation resulted in a remarkably strength loss of the MHR‐10 charges. Whereas, further degradation of TiH2 was prevented by the formation of the external TiO2 film, which ensured the compatibility and stability of the THR‐10 explosive composites. Though the energy performance of the studied fresh RDX based metal hydride explosives was promoted (illustrated by underwater explosion tests), the storage stability of MHR‐10 was unsatisfied for practical application. Details are discussed in the article by Bing Xue et al. on page 671 ff.

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

“…However, some studies have found that metal hydrides can replace metals as better additives to mix with EMs. 6 , 7 Compared with metal power, metal hydrides possess high hydrogen storage capacity and higher combustion heat. Their decomposition can release large amounts of hydrogen, which allows them to release more energy and decline the average molecular weight of the gas in the combustion process.…”