Investigation on the microstructures, mechanical properties and impact initiation characteristics of Al/PTFE reactive materials reinforced by TiH2 particles
Aluminum/Polytetrafluoroethylene (Al/PTFE) is a representative energetic material, which can be used in many fields including defense weapon fragments, insensitive penetrator or oil-well perforation. However, the insufficient mechanical strength of traditional ingredient has seriously restricted its...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423026315 |
| _version_ | 1797301521475436544 |
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| author | Xiangchun Xu Hongjie Fang Qingchun Zhang Juemin Song Zheng Li Junxue Bao Daipeng Zeng Gang Liu Xiansheng Wang Kun Yu |
| author_facet | Xiangchun Xu Hongjie Fang Qingchun Zhang Juemin Song Zheng Li Junxue Bao Daipeng Zeng Gang Liu Xiansheng Wang Kun Yu |
| author_sort | Xiangchun Xu |
| collection | DOAJ |
| description | Aluminum/Polytetrafluoroethylene (Al/PTFE) is a representative energetic material, which can be used in many fields including defense weapon fragments, insensitive penetrator or oil-well perforation. However, the insufficient mechanical strength of traditional ingredient has seriously restricted its penetration ability, and traditional additives improve its compressive strength at the expense of reactivity. Hence, innovative component design and advanced manufacturing technology should be applied to Al/PTFE composite. In this investigation, TiH2 as a new reinforcement is introduced into Al/PTFE to improve both strength and reactivity. Quasi-static and dynamic compressive tests were conducted, and the impact reaction process was recorded by high-speed camera. The results shown Al/PTFE/TiH2 composites are all elasto-plastic materials, significant strain hardening and strain rate hardening phenomenon were observed. The compressive strength increased first and then decreased with increase in TiH2 content, reached the maximum of 185.1 MPa at the strain rate of 5000 s−1 when TiH2 content was 30 %, which increased by 30.4 % compared to traditional Al/PTFE. A newly-developed drop-weight device was used to quantitatively characterize reactivity, and the reaction efficiency reached 8.2 % when TiH2 content was 30 %, increased by 43.2 % compared to Al/PTFE. The formation of oriented PTFE nano-fibers was considered the important strengthening mechanism. The established Johnson–Cook model was agreed well with experimental results. Combining the results of thermogravimetry-differential scanning calorimetry (TG-DSC) tests with X-ray diffraction (XRD) analysis of reaction residues, the reaction mechanism was clarified. The impact initiation reaction was in a mechano-chemical manner and the reactivity was speculated to be the results of multiple actions between Al/PTFE and TiH2. |
| first_indexed | 2024-03-07T23:23:47Z |
| format | Article |
| id | doaj.art-636711cf023f4ee395dd90720a93abab |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:23:47Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-636711cf023f4ee395dd90720a93abab2024-02-21T05:26:41ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012737413750Investigation on the microstructures, mechanical properties and impact initiation characteristics of Al/PTFE reactive materials reinforced by TiH2 particlesXiangchun Xu0Hongjie Fang1Qingchun Zhang2Juemin Song3Zheng Li4Junxue Bao5Daipeng Zeng6Gang Liu7Xiansheng Wang8Kun Yu9School of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Mechanical and Electrical Engineering, Zaozhuang University, Zaozhuang 277160, ChinaState Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, ChinaHunan Hydrodynamic New Materials Co. Ltd, Xiangtan 411101, ChinaHunan Hydrodynamic New Materials Co. Ltd, Xiangtan 411101, ChinaInstitute of Fluent Physics, China Academy of Engineering Physics, Mianyang 621900, ChinaInstitute of Fluent Physics, China Academy of Engineering Physics, Mianyang 621900, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, China; Corresponding author.Aluminum/Polytetrafluoroethylene (Al/PTFE) is a representative energetic material, which can be used in many fields including defense weapon fragments, insensitive penetrator or oil-well perforation. However, the insufficient mechanical strength of traditional ingredient has seriously restricted its penetration ability, and traditional additives improve its compressive strength at the expense of reactivity. Hence, innovative component design and advanced manufacturing technology should be applied to Al/PTFE composite. In this investigation, TiH2 as a new reinforcement is introduced into Al/PTFE to improve both strength and reactivity. Quasi-static and dynamic compressive tests were conducted, and the impact reaction process was recorded by high-speed camera. The results shown Al/PTFE/TiH2 composites are all elasto-plastic materials, significant strain hardening and strain rate hardening phenomenon were observed. The compressive strength increased first and then decreased with increase in TiH2 content, reached the maximum of 185.1 MPa at the strain rate of 5000 s−1 when TiH2 content was 30 %, which increased by 30.4 % compared to traditional Al/PTFE. A newly-developed drop-weight device was used to quantitatively characterize reactivity, and the reaction efficiency reached 8.2 % when TiH2 content was 30 %, increased by 43.2 % compared to Al/PTFE. The formation of oriented PTFE nano-fibers was considered the important strengthening mechanism. The established Johnson–Cook model was agreed well with experimental results. Combining the results of thermogravimetry-differential scanning calorimetry (TG-DSC) tests with X-ray diffraction (XRD) analysis of reaction residues, the reaction mechanism was clarified. The impact initiation reaction was in a mechano-chemical manner and the reactivity was speculated to be the results of multiple actions between Al/PTFE and TiH2.http://www.sciencedirect.com/science/article/pii/S2238785423026315Energetic materialsAl/PTFE/TiH2Dynamic mechanical propertiesImpact reaction mechanismImpact energy release |
| spellingShingle | Xiangchun Xu Hongjie Fang Qingchun Zhang Juemin Song Zheng Li Junxue Bao Daipeng Zeng Gang Liu Xiansheng Wang Kun Yu Investigation on the microstructures, mechanical properties and impact initiation characteristics of Al/PTFE reactive materials reinforced by TiH2 particles Journal of Materials Research and Technology Energetic materials Al/PTFE/TiH2 Dynamic mechanical properties Impact reaction mechanism Impact energy release |
| title | Investigation on the microstructures, mechanical properties and impact initiation characteristics of Al/PTFE reactive materials reinforced by TiH2 particles |
| title_full | Investigation on the microstructures, mechanical properties and impact initiation characteristics of Al/PTFE reactive materials reinforced by TiH2 particles |
| title_fullStr | Investigation on the microstructures, mechanical properties and impact initiation characteristics of Al/PTFE reactive materials reinforced by TiH2 particles |
| title_full_unstemmed | Investigation on the microstructures, mechanical properties and impact initiation characteristics of Al/PTFE reactive materials reinforced by TiH2 particles |
| title_short | Investigation on the microstructures, mechanical properties and impact initiation characteristics of Al/PTFE reactive materials reinforced by TiH2 particles |
| title_sort | investigation on the microstructures mechanical properties and impact initiation characteristics of al ptfe reactive materials reinforced by tih2 particles |
| topic | Energetic materials Al/PTFE/TiH2 Dynamic mechanical properties Impact reaction mechanism Impact energy release |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423026315 |
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