Structural response of aluminum core-shell particles in detonation environment

doi:10.1088/1674-1056/28/8/088201

Abstract Natural aluminum particles have the core-shell structure. The structure response refers to the mechanical behavior of the aluminum particle structure caused by external influences. The dynamic behavior of the structural response of aluminum core-shell particles before combustion is of great importance for the aluminum powder burning mechanism and its applications. In this paper, an aluminum particle combustion experiment in a detonation environment is conducted and analyzed; the breakage factors of aluminum particles shell in detonation environment are analyzed. The experiment results show that the aluminum particle burns in a gaseous state and condenses into a sub-micron particle cluster. The calculation and simulation demonstrate that the rupture of aluminum particle shell in the detonation environment is mainly caused by the impact of the detonation wave. The detonation wave impacts the aluminum particles, resulting in shell cracking, and due to the shrinkage-expansion of the aluminum core and stripping of the detonation product, the cracked shell is fractured and peeled with the aluminum reacting with the detonation product.

Keywords: aluminum core-shell particles structural response aluminum combustion aluminized explosives

Received: 21 May 2019
Revised: 13 June 2019
Accepted manuscript online:

PACS:	82.33.Vx	(Reactions in flames, combustion, and explosions)
	47.40.Rs	(Detonation waves)
	47.70.Pq	(Flames; combustion)
	65.80.-g	(Thermal properties of small particles, nanocrystals, nanotubes, and other related systems)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11772058).

Corresponding Authors: Jian-Xin Nie
E-mail: niejx@bit.edu.cn

Cite this article:

Qing-Jie Jiao(焦清介), Qiu-Shi Wang(王秋实), Jian-Xin Nie(聂建新), Hong-Bo Pei(裴红波) Structural response of aluminum core-shell particles in detonation environment 2019 Chin. Phys. B 28 088201

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