Mitigating the negative catalytic effect of CuO by FAS-17 coated Al nanopowder:Isothermal ageing of Al/CuO nanothermite at 71 ℃ and 60％relative humidity

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外文摘要：The safety and reliability of weapon systems would be significantly affected by changes in the perfor-mance of energetic materials due to ambient temperature and humidity.Nanothermites have promising applications due to their excellent reactivity.Therefore it becomes extremely important to understand their aging and failure process in the environment before using them.Here,the aging and failure process of Al/CuO in 71 ℃/60％RH were investigated,and showed that CuO nanoparticles negatively catalyze Al nanopowders,resulting in rapid hydration.The anti-aging effect of FAS-17-coated Al nanopowder was also examined.The aging process of Al,Al/CuO,and Al@FAS-17/CuO in high humidity and heat envi-ronment were revealed by quasi-in situ SEM and TEM methods.Compared with the aging of pure Al,the Al nanopowder in the nanothermites strongly agglomerated with the CuO nanopowder and hydrated earlier.This may be caused by CuO catalyzed hydration of Al nanopowder.The energy release experi-ments showed that the performance of Al/CuO decreased rapidly and failed to ignite after 4 h of aging.In contrast,the Al@FAS-17/CuO thermite can achieve long-term stability of up to 60 h in the same envi-ronment by simple cladding of FAS-17.It is found that FAS-17 coated Al nanopowder can prevent both particle agglomeration and water erosion,which is an effective means to make nanothermites appli-cation in high humidity and heat environment.

外文关键词：

Al/CuO nanothermiteFAS-17 coatingAging and failure process

作者：

Fuwei Li、Qian Wang、Jian Cheng、Zehua Zhang、Yuxuan Zhou、Keer Ouyang、Jianbing Xu、Yinghua Ye、Ruiqi Shen

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作者单位：

School of Chemistry and Chemical Engineering,Nanjing University of Science & Technology,Nanjing 210094,China

Micro-Nano Energetic Devices Key Laboratory,Ministry of Industry and Information Technology,Nanjing 210094,Jiangsu,China

Institute of Space Propulsion,Nanjing University of Science and Technology,Nanjing 210094,China

基金：

国家自然科学基金

项目编号：

22275092

出版年：

2024

DOI：

10.1016/j.dt.2023.11.003

防务技术

中国兵工学会

防务技术

CSTPCD

影响因子：0.358

ISSN：2214-9147

年,卷(期)：2024.34(4)