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| Research on Thermal Properties and Failure of Ball Milled Aluminum/Polytetrafluoroethylene |
| Received:January 15, 2022 Revised:January 26, 2022 |
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| DOI：10.7643/issn.1672-9242.2022.02.007 |
| KeyWord:high-energy ball milling aluminum powder polytetrafluoroethylene exothermic property accelerated aging test failure |
| Author | Institution |
| ZHOU Hang |
Shijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang , China |
| ZHEN Jian-wei |
Shijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang , China |
| DU Shi-guo |
Shijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang , China |
| LI Chen |
Institute of Chemical Defense, Academy of Military Science, Zhijiang , China |
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| Abstract: |
| In order to study the storage capacity of high activity Aluminum/Polytetrafluoroethylene (Al/PTFE) energetic materials at room temperature, Al/PTFE composites were prepared by the method of high-energy ball milling. The accelerated temperature aging test of the prepared Al/PTFE composites was carried out. The exothermic properties of the materials in different aging periods were studied by the differential thermal analysis method, and its failure time was evaluated. The study results suggest that the reaction mode between the samples prepared by ball milling is a gas-solid reaction. The sample prepared by dry ball-milling has high heat release as well as long storage life, and its heat release is 1.82 kJ/g, and the heat release performance loss of the reaction is less than 20% within 4 years of aging. The sample prepared by wet ball-milling has exceptionally high reactivity and a heat release of 2.86 kJ/g, but its obvious failure occurs after one year of aging. The results of samples analysis show that the sample obtained by dry ball-milling has a low exothermic capacity. But it can keep the reactivity at a longer period. The method of dry ball-milling is more suitable for long-term storage. |
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