1. Reactions of Al-PTFE under Impact and Quasi-Static Compression
- Author
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Shuangzhang Wu, Bin Feng, Yiming Mao, Huai-xi Wang, Yuchun Li, and Xiang Fang
- Subjects
Inert ,Toughness ,Crystallinity ,Materials science ,Article Subject ,lcsh:TA401-492 ,General Engineering ,lcsh:Materials of engineering and construction. Mechanics of materials ,General Materials Science ,Composite material ,Compression (physics) ,Quasistatic process ,Dynamic testing - Abstract
Conventionally, the Al-PTFE is thought to be inert under quasi-static or static loads. However, here we reported an initiation phenomenon of Al-PTFE under quasi-static compression. Quasi-static tests suggest that reacted Al-PTFE samples had much higher toughness than unreacted samples. Dynamic test showed that the energy level needed to initiate the material was similar for quasi-static compression (88–100 J) and dynamic impact (77–91 J). The difference in density indicates that unreacted Al-PTFE has a higher crystallinity, which leads to the lower toughness. SEM images show numerous PTFE fibrils in unreacted composites which made the sample harder to crack and initiate.
- Published
- 2015