Methods of the Synthesis of Aluminum Borides from Elemental Substances for Use as High-Energy Materials: A Review

Guseinov, Sh. L.; Fedorov, S. G.; Стороженко, П. А.

doi:10.1134/s0040579520040089

Cited by 1 publication

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aluminum borides and aluminum–boron composite powders have significant practical interest as energetic additives to fuels, explosives and propellants due to their high heat of combustion and satisfactory combustion kinetics [1]. In particular, a preliminary assessment of energy parameters of explosives with a composition of 10%Al–90%HMX and 10%“Al2B”–90%HMX, performed according to the methods described in [2–4], indicates a considerable advantage of the latter to provide a higher detonation pressure.…”

Section: Introductionmentioning

confidence: 99%

Metastable aluminum boride: density functional theory study of prerequisites of formation

Flyagina,

Markov,

Malkin

et al. 2023

Int J of Quantum Chemistry

View full text Add to dashboard Cite

Aluminum borides have significant practical interest as energetic additives to fuels, explosives and propellants due to their favorable thermodynamic and kinetic characteristics. Density functional theory calculations with periodic boundary conditions have been performed to evaluate the enthalpy of formation of two aluminum borides: the well‐known aluminum diboride AlB2 and the metastable Al1.28B phase, which precedes the formation of AlB2 during heat treatment of mechanically activated composite aluminum‐boron powders, as well as aluminum ion‐implanted with boron. The calculated formation enthalpy of AlB2 is −3.6 kcal/mol, which agrees well with estimates from literature. The enthalpy of formation of Al1.28B, calculated for the first time, is 4.8 ± 0.4 kcal/mol. To understand the prerequisites for the formation of Al1.28B observed in experiments, the enthalpy of formation of supersaturated solid solutions of B in Al has been evaluated. The reasons for the preferential formation of the metastable Al1.28B phase over the thermodynamically stable AlB2 phase are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%