Thermodynamics and performance of Al/CuO nanothermite with different storage time
| Autor: | Jianbing Xu, Yinghua Ye, Ruiqi Shen, Zhang Zehua, Yang Tenglong, Yun Shen, Li Fuwei, Wang Cheng'ai, Yueting Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Materials science Scanning electron microscope Mechanical Engineering Metals and Alloys Computational Mechanics Analytical chemistry Autoignition temperature 02 engineering and technology Activation energy 01 natural sciences 010305 fluids & plasmas law.invention Ignition system 020901 industrial engineering & automation Differential scanning calorimetry Military Science X-ray photoelectron spectroscopy law Transmission electron microscopy 0103 physical sciences Ceramics and Composites Diffractometer |
| Zdroj: | Defence Technology, Vol 17, Iss 3, Pp 741-747 (2021) |
| ISSN: | 2214-9147 |
| Popis: | The storage stability of energetic materials is important for its application. Here, the storage stability of Al/CuO nanothermite, which was prepared by electrospray method and stored with different storage time, was systematically researched. The activation energy of Al/CuO nanothermite was calculated by differential scanning calorimetry (DSC). The ignition temperature and the curve pressure history of Al/CuO nanothermite was measured using ignition temperature measuring device and constant-volume pressurization tests, respectively. Further, the thermites were characterized by X-ray Diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and Transmission electron microscopy (TEM). The results show that the morphology of the thermites did not change significantly. The activation energy was decreased from 254.1 kJ/mol to 181.8 kJ/mol after storage for 13 months. When stored for 0, 7 and 13 months, the peak pressures of Al/CuO nanothermite were 685.8 kPa, 626.3 kPa and 625.5 kPa, respectively. In addition to the ignition temperature, it was 775 °C, 739 °C and 754 °C, respectively. This result indicated that the ignition and combustion properties of Al/CuO nanothermite are obviously reduced when stored for a long time, at room temperature. |
| Databáze: | OpenAIRE |
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