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Polymers 2018, 10(1), 56; doi:10.3390/polym10010056

Influence of Temperature on the Mechanical Properties and Reactive Behavior of Al-PTFE under Quasi-Static Compression

College of Field Engineering, PLA Army Engineering University, Nanjing 210007, China
China Huayin Ordnance Test Center, Huayin 714200, China
Authors to whom correspondence should be addressed.
Received: 1 December 2017 / Revised: 27 December 2017 / Accepted: 5 January 2018 / Published: 10 January 2018
(This article belongs to the Special Issue Mechanics of Emerging Polymers with Unprecedented Networks)
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Al-PTFE (aluminum-polytetrafluoroethylene) is a typical kind of Reactive Material (RM), which has a variety of potential applications in weapon systems. In this paper, quasi-static compression experiments were carried out for a pressed and sintered mixture of Al and PTFE powders using a microcomputer-controlled electronic universal testing machine. The results show that both the mechanical property and reactive behavior of Al-PTFE are strongly temperature-dependent. The material undergoes a brittle-ductile transition associated with a temperature-induced crystalline phase transformation of the PTFE matrix. At low temperatures (−18, 0, and 16 °C), samples of Al-PTFE failed with shear crack and no reaction was observed. As the temperature increased (22, 35, and 80 °C), Al-PTFE exhibited a high toughness and violent reaction occurred in all of the tested samples. Scanning electron microscope observations showed different fracture mechanisms of the PTFE matrix and the increase in toughness was due to the formation of PTFE fibrils which could dissipate energy and bridge crack plane during plastic deformation. View Full-Text
Keywords: Al-PTFE; quasi-static compression; mechanical response; reactive behavior; temperature Al-PTFE; quasi-static compression; mechanical response; reactive behavior; temperature

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wang, H.-X.; Fang, X.; Feng, B.; Gao, Z.-R.; Wu, S.-Z.; Li, Y.-C. Influence of Temperature on the Mechanical Properties and Reactive Behavior of Al-PTFE under Quasi-Static Compression. Polymers 2018, 10, 56.

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