Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3070119
Keywords
aluminium; cobalt; digital photography; foils; multilayers; reaction kinetics; surface chemistry; surface morphology
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Funding
- Sandia Laboratory Directed Research & Development program
- Sandia Corporation
- Lockheed Martin Co.
- United States Department of Energy's National Nuclear Security Administration [DE-AC0494AL85000]
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Propagating reactions in initially planar cobalt/aluminum exothermic multilayer foils have been investigated using high-speed digital photography. Real-time observations of reactions indicate that unsteady (spinlike) reaction propagation leads to the formation of highly periodic surface morphologies with length scales ranging from 1 mu m to 1 mm. The characteristics of propagating spinlike reactions and corresponding reacted foil morphologies depend on the bilayer thickness of multilayer foils.
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