Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell construction
A facile and economical approach was developed for the large-scale production of powdered core-shell structured PTFE/Al (CS-PA) energetic materials through ultrasonic-assisted mixing. The low-cost micrometer-sized PTFE and Al particles were used as starting materials. Under high-power ultrasonic wav...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-08-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914721001392 |
| _version_ | 1828443783583236096 |
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| author | Zhou-yang Wu Jin-xu Liu Song Zhang Xian-qing Liu Xiao Xu Wei-zhe Ma Shu-kui Li Chuan He |
| author_facet | Zhou-yang Wu Jin-xu Liu Song Zhang Xian-qing Liu Xiao Xu Wei-zhe Ma Shu-kui Li Chuan He |
| author_sort | Zhou-yang Wu |
| collection | DOAJ |
| description | A facile and economical approach was developed for the large-scale production of powdered core-shell structured PTFE/Al (CS-PA) energetic materials through ultrasonic-assisted mixing. The low-cost micrometer-sized PTFE and Al particles were used as starting materials. Under high-power ultrasonic waves, the PTFE powder was dispersed into nano-to sub-micrometer-sized particles and then encapsulated the Al microparticles to form the core-shell structure. The heat of combustion, burning rate, and pressurization rate of the powdered CS-PA were measured. The thermal-initiated reaction behavior was further evaluated using thermogravimetry-differential scanning calorimetry. Subsequently, the bulk CS-PA with a uniform microstructure was obtained via cold isostatic pressing of the powdered CS-PA followed by vacuum sintering. For the bulk CS-PA, the quasi-static compression behavior was characterized, and the impact-initiated reaction processes were conducted using the Split Hopkinson Pressure Bar (SHPB) and evaluated by a high-speed camera. Compared to physically mixed PTFE/Al materials, the powdered and bulk CS-PA demonstrated enhanced thermal- and impact-initiated reaction characteristics respectively, proving the effectiveness of our approach for constructing core-shell structures. |
| first_indexed | 2024-12-10T21:34:09Z |
| format | Article |
| id | doaj.art-6878087172a643efa77a5f7a2b37c935 |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-12-10T21:34:09Z |
| publishDate | 2022-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-6878087172a643efa77a5f7a2b37c9352022-12-22T01:32:41ZengKeAi Communications Co., Ltd.Defence Technology2214-91472022-08-0118813621368Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell constructionZhou-yang Wu0Jin-xu Liu1Song Zhang2Xian-qing Liu3Xiao Xu4Wei-zhe Ma5Shu-kui Li6Chuan He7School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; Corresponding author.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaScience and Technology on Transient Impact Laboratory, No. 208 Research Institute of China Ordnance Industries, 102202, ChinaScience and Technology on Transient Impact Laboratory, No. 208 Research Institute of China Ordnance Industries, 102202, ChinaScience and Technology on Transient Impact Laboratory, No. 208 Research Institute of China Ordnance Industries, 102202, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; Department of Materials Science and Engineering, Shenzhen MSU-BIT University, Shenzhen, 518172, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; Corresponding author.A facile and economical approach was developed for the large-scale production of powdered core-shell structured PTFE/Al (CS-PA) energetic materials through ultrasonic-assisted mixing. The low-cost micrometer-sized PTFE and Al particles were used as starting materials. Under high-power ultrasonic waves, the PTFE powder was dispersed into nano-to sub-micrometer-sized particles and then encapsulated the Al microparticles to form the core-shell structure. The heat of combustion, burning rate, and pressurization rate of the powdered CS-PA were measured. The thermal-initiated reaction behavior was further evaluated using thermogravimetry-differential scanning calorimetry. Subsequently, the bulk CS-PA with a uniform microstructure was obtained via cold isostatic pressing of the powdered CS-PA followed by vacuum sintering. For the bulk CS-PA, the quasi-static compression behavior was characterized, and the impact-initiated reaction processes were conducted using the Split Hopkinson Pressure Bar (SHPB) and evaluated by a high-speed camera. Compared to physically mixed PTFE/Al materials, the powdered and bulk CS-PA demonstrated enhanced thermal- and impact-initiated reaction characteristics respectively, proving the effectiveness of our approach for constructing core-shell structures.http://www.sciencedirect.com/science/article/pii/S2214914721001392PTFE/AlCore-shell structureEnergetic materialsUltrasonic-assisted mixing |
| spellingShingle | Zhou-yang Wu Jin-xu Liu Song Zhang Xian-qing Liu Xiao Xu Wei-zhe Ma Shu-kui Li Chuan He Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell construction Defence Technology PTFE/Al Core-shell structure Energetic materials Ultrasonic-assisted mixing |
| title | Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell construction |
| title_full | Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell construction |
| title_fullStr | Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell construction |
| title_full_unstemmed | Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell construction |
| title_short | Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell construction |
| title_sort | enhanced thermal and impact initiated reactions of ptfe al energetic materials through ultrasonic assisted core shell construction |
| topic | PTFE/Al Core-shell structure Energetic materials Ultrasonic-assisted mixing |
| url | http://www.sciencedirect.com/science/article/pii/S2214914721001392 |
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