Direct observation of spinlike reaction fronts in planar energetic multilayer foils

McDonald, Joel P.; Hodges, V. Carter; Jones Jr., Eric D.; Adams, David P.
January 2009
Applied Physics Letters;1/19/2009, Vol. 94 Issue 3, pN.PAG
Academic Journal
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 μm 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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