Photo-responsive behaviors and structural evolution of carbon-nanotube-supported energetic materials under a photoflash
| Autor: | Xu Xiang, Zheng Wang, Guang Hua, Xia Wang, Shi-Biao Xiang |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Nanocomposite Mechanical Engineering Composite number Oxide Autoignition temperature Carbon nanotube Condensed Matter Physics law.invention Ignition system chemistry.chemical_compound symbols.namesake chemistry Mechanics of Materials law symbols General Materials Science Composite material Raman spectroscopy High-resolution transmission electron microscopy |
| Zdroj: | Materials Letters. 88:27-29 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2012.08.049 |
| Popis: | The photo-responsive behaviors of energetic materials (metal/oxidant) supported by CNTs were investigated under a common photoflash. The remarkable ignition (and/or combustion) was observed in the metal/oxidant/CNT composite with an appropriate ratio, while no obvious change was found in the absence of CNT under the identical flash conditions. The structural characterization indicated that the metallic Zr was oxidized into the corresponding metal oxide (ZrO 2 ) after ignition due to high temperature and the exposure to air ambient. The CNTs showed increased structural defects, indicated by HRTEM and Raman spectra. The enhanced photo-response can be attributed to the absorption capability of CNTs to flash energy and high thermal conductivity, leading to a rapid increase in the internal temperature of composite materials up to ignition temperature within a very short time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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