Influence of particle size on the breaking of aluminum particle shells

doi:10.1088/1674-1056/ac5615

中国物理B ›› 2022, Vol. 31 ›› Issue (7): 76107-076107.doi: 10.1088/1674-1056/ac5615

Influence of particle size on the breaking of aluminum particle shells

Tian-Yi Wang(王天一)¹, Zheng-Qing Zhou(周正青)^1,†, Jian-Ping Peng(彭剑平)², Yu-Kun Gao(高玉坤)¹, and Ying-Hua Zhang(张英华)¹

1 School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2 Zhaojin Mining Industry Co., Ltd, Zhaoyuan 265400, China

收稿日期:2021-10-24 修回日期:2021-12-30 接受日期:2022-02-17 出版日期:2022-06-09 发布日期:2022-06-18
通讯作者: Zheng-Qing Zhou E-mail:zhouzhengqing@ustb.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11802160).

Influence of particle size on the breaking of aluminum particle shells

Tian-Yi Wang(王天一)¹, Zheng-Qing Zhou(周正青)^1,†, Jian-Ping Peng(彭剑平)², Yu-Kun Gao(高玉坤)¹, and Ying-Hua Zhang(张英华)¹

1 School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2 Zhaojin Mining Industry Co., Ltd, Zhaoyuan 265400, China

Received:2021-10-24 Revised:2021-12-30 Accepted:2022-02-17 Online:2022-06-09 Published:2022-06-18
Contact: Zheng-Qing Zhou E-mail:zhouzhengqing@ustb.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11802160).

摘要/Abstract

摘要： Rupturing the alumina shell (shell-breaking) is a prerequisite for releasing energy from aluminum powder. Thermal stress overload in a high-temperature environment is an important factor in the rupture of the alumina shell. COMSOL Multiphysics was used to simulate and analyze the shell-breaking response of micron-scale aluminum particles with different particle sizes at 650 ℃ in vacuum. The simulation results show that the thermal stability time and shell-breaking response time of 10 μm-100 μm aluminum particles are 0.15 μs-11.44 μs and 0.08 μs-3.94 μs, respectively. They also reveal the direct causes of shell breaking for aluminum particles with different particle sizes. When the particle size is less than 80 μm, the shell-breaking response is a direct result of compressive stress overload. When the particle size is between 80 μm and 100 μm, the shell-breaking response is a direct result of tensile stress overload. This article provides useful guidance for research into the energy release of aluminum powder.

关键词: aluminum particle, shell-core structure, thermal stress, shell-breaking

Abstract: Rupturing the alumina shell (shell-breaking) is a prerequisite for releasing energy from aluminum powder. Thermal stress overload in a high-temperature environment is an important factor in the rupture of the alumina shell. COMSOL Multiphysics was used to simulate and analyze the shell-breaking response of micron-scale aluminum particles with different particle sizes at 650 ℃ in vacuum. The simulation results show that the thermal stability time and shell-breaking response time of 10 μm-100 μm aluminum particles are 0.15 μs-11.44 μs and 0.08 μs-3.94 μs, respectively. They also reveal the direct causes of shell breaking for aluminum particles with different particle sizes. When the particle size is less than 80 μm, the shell-breaking response is a direct result of compressive stress overload. When the particle size is between 80 μm and 100 μm, the shell-breaking response is a direct result of tensile stress overload. This article provides useful guidance for research into the energy release of aluminum powder.

Key words: aluminum particle, shell-core structure, thermal stress, shell-breaking

中图分类号: (Alloys )

61.66.Dk

62.20.mq (Buckling) 68.35.Rh (Phase transitions and critical phenomena) 61.43.Gt (Powders, porous materials)

Tian-Yi Wang(王天一), Zheng-Qing Zhou(周正青), Jian-Ping Peng(彭剑平),Yu-Kun Gao(高玉坤), and Ying-Hua Zhang(张英华). Influence of particle size on the breaking of aluminum particle shells[J]. 中国物理B, 2022, 31(7): 76107-076107.

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Influence of particle size on the breaking of aluminum particle shells

Influence of particle size on the breaking of aluminum particle shells

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