Probing the Reaction Dynamics of Thermite Nanolaminates
| Autor: | Edward J. Mily, Garth C. Egan, Jon Paul Maria, Michael R. Zachariah |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Diffusion Analytical chemistry chemistry.chemical_element Thermite Autoignition temperature Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Ignition system General Energy chemistry law Sputtering Temperature jump Reactivity (chemistry) Physical and Theoretical Chemistry Platinum |
| Zdroj: | The Journal of Physical Chemistry C. 119:20401-20408 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Al/CuO reactive nanolaminate ignition was studied using temperature jump (T-Jump) heating for rates greater than 105 K/s. Multilayer samples were sputter deposited onto thin platinum filaments in alternating layers of Al and CuO. The filaments were resistively heated in a time-of-flight mass spectrometer (ToF-MS), while ignition and reaction were observed with high-speed video. A total deposited thickness of 1800 nm was maintained for all samples, while the number of bilayers was varied from 1 to 12. Increasing this value decreased the diffusion distances and increased the amount of interfacial area across which reaction could occur, while keeping the overall energy of the system constant. From 2 to 6 bilayers, the ignition temperature decreased from 1250 to 670 K and the overall reactivity increased. Past 6 bilayers, the ignition temperature only decreased slightly and there was little impact on the overall reactivity. This behavior is consistent with a mass-transport model where the predominant diffusin... |
| Databáze: | OpenAIRE |
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