中国物理B ›› 2019, Vol. 28 ›› Issue (8): 88201-088201.doi: 10.1088/1674-1056/28/8/088201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Structural response of aluminum core-shell particles in detonation environment

Qing-Jie Jiao(焦清介), Qiu-Shi Wang(王秋实), Jian-Xin Nie(聂建新), Hong-Bo Pei(裴红波)   

  1. 1 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;
    2 China Academy of Engineering Physics, Institute of Fluid Physics, Mianyang 621900, China
  • 收稿日期:2019-05-21 修回日期:2019-06-13 出版日期:2019-08-05 发布日期:2019-08-05
  • 通讯作者: Jian-Xin Nie E-mail:niejx@bit.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11772058).

Structural response of aluminum core-shell particles in detonation environment

Qing-Jie Jiao(焦清介)1, Qiu-Shi Wang(王秋实)1, Jian-Xin Nie(聂建新)1, Hong-Bo Pei(裴红波)2   

  1. 1 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;
    2 China Academy of Engineering Physics, Institute of Fluid Physics, Mianyang 621900, China
  • Received:2019-05-21 Revised:2019-06-13 Online:2019-08-05 Published:2019-08-05
  • Contact: Jian-Xin Nie E-mail:niejx@bit.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11772058).

摘要: 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.

关键词: aluminum core-shell particles, structural response, aluminum combustion, aluminized explosives

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.

Key words: aluminum core-shell particles, structural response, aluminum combustion, aluminized explosives

中图分类号:  (Reactions in flames, combustion, and explosions)

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